//
//  Copyright (C) 2019-2023 Greg Landrum and other RDKit contributors
//
//   @@ All Rights Reserved @@
//  This file is part of the RDKit.
//  The contents are covered by the terms of the BSD license
//  which is included in the file license.txt, found at the root
//  of the RDKit source tree.
//
#include <catch2/catch_all.hpp>
#include <numeric>
#include <random>

#include <GraphMol/RDKitBase.h>

#include <RDGeneral/hash/hash.hpp>
#include <GraphMol/Chirality.h>
#include <GraphMol/SmilesParse/SmilesParse.h>
#include <GraphMol/MolDraw2D/MolDraw2D.h>
#include <GraphMol/MolDraw2D/MolDraw2DSVG.h>
#include <GraphMol/MolDraw2D/MolDraw2DUtils.h>
#include <GraphMol/MolDraw2D/MolDraw2DDetails.h>
#include <GraphMol/MolDraw2D/DrawMol.h>
#include <GraphMol/FileParsers/FileParsers.h>
#include <GraphMol/FileParsers/PNGParser.h>
#include <boost/algorithm/string/split.hpp>
#include <GraphMol/ChemReactions/Reaction.h>
#include <GraphMol/ChemReactions/ReactionParser.h>
#include <GraphMol/CIPLabeler/CIPLabeler.h>
#include <GraphMol/Depictor/RDDepictor.h>
#include <Geometry/point.h>
#include <GraphMol/test_fixtures.h>

#include <regex>

#ifdef RDK_BUILD_CAIRO_SUPPORT
#include <cairo.h>
#include "MolDraw2DCairo.h"
#endif

// a lot of the tests check <text> flags in the SVG.  That doesn't
// happen with the Freetype versions
static const bool NO_FREETYPE = true;

namespace {

// if the generated SVG hashes to the value we're expecting, delete
// the file.  That way, only the files that need inspection will be
// left at the end of the run.
// The hand-drawn pictures will fail this frequently due to the use
// of random numbers to draw the lines.  As well as all the testHandDrawn
// files, this includes testBrackets-5a.svg and testPositionVariation-1b.svg
const bool DELETE_WITH_GOOD_HASH = true;
// The expected hash code for a file may be included in these maps, or
// provided in the call to check_file_hash().
// These values are for a build with FreeType, so expect them all to be
// wrong when building without.
const std::map<std::string, std::hash_result_t> SVG_HASHES = {
    {"testAtomTags_1.svg", 3187798125U},
    {"testAtomTags_2.svg", 822910240U},
    {"testAtomTags_3.svg", 2244078420U},
    {"contourMol_1.svg", 3634867913U},
    {"contourMol_2.svg", 1815941817U},
    {"contourMol_3.svg", 2579392727U},
    {"contourMol_4.svg", 2914799663U},
    {"contourMol_5.svg", 3792684719U},
    {"contourMol_6.svg", 1743220181U},
    {"contourMol_7.svg", 2221193310U},
    {"testDativeBonds_1.svg", 1984402893U},
    {"testDativeBonds_2.svg", 1091476418U},
    {"testDativeBonds_3.svg", 1602774141U},
    {"testDativeBonds_2a.svg", 2463158006U},
    {"testDativeBonds_2b.svg", 3095643972U},
    {"testDativeBonds_2c.svg", 1745138239U},
    {"testDativeBonds_2d.svg", 3279423301U},
    {"testZeroOrderBonds_1.svg", 3733430366U},
    {"testFoundations_1.svg", 2283802316U},
    {"testFoundations_2.svg", 2468031318U},
    {"testTest_1.svg", 2468031318U},
    {"testKekulizationProblems_1.svg", 2284161107U},
    {"testAtomBondIndices_1.svg", 2702803018U},
    {"testAtomBondIndices_2.svg", 1564350363U},
    {"testAtomBondIndices_3.svg", 1346662812U},
    {"testAtomBondIndices_4.svg", 662361891U},
    {"testAtomBondIndices_5.svg", 1502163147U},
    {"testAtomBondIndices_6.svg", 1659568104U},
    {"testGithub3226_1.svg", 831257877U},
    {"testGithub3226_2.svg", 3517325227U},
    {"testGithub3226_3.svg", 3609721552U},
    {"testGithub3369_1.svg", 1227653771U},
    {"testIncludeRadicals_1a.svg", 1829641340U},
    {"testIncludeRadicals_1b.svg", 4184066907U},
    {"testLegendsAndDrawing-1.svg", 3563802758U},
    {"testGithub3577-1.svg", 763116213U},
    {"testHandDrawn-1.svg", 2253418236U},
    {"testHandDrawn-2.svg", 794717511U},
    {"testHandDrawn-3.svg", 3982694296U},
    {"testHandDrawn-4.svg", 2146113517U},
    {"testHandDrawn-5a.svg", 1567781555U},
    {"testHandDrawn-5b.svg", 66354106U},
    {"testBrackets-1a.svg", 4189399574U},
    {"testBrackets-1b.svg", 3773894816U},
    {"testBrackets-1c.svg", 4189399574U},
    {"testBrackets-1d.svg", 3773894816U},
    {"testBrackets-1e.svg", 2492125470U},
    {"testBrackets-2a.svg", 1050851904U},
    {"testBrackets-2b.svg", 776446765U},
    {"testBrackets-2c.svg", 1050851904U},
    {"testBrackets-2d.svg", 776446765U},
    {"testBrackets-3a.svg", 3096284602U},
    {"testBrackets-4a.svg", 3837821771U},
    {"testBrackets-4b.svg", 1477006167U},
    {"testBrackets-5a.svg", 1447240271U},
    {"testBrackets-5768.svg", 2559120196U},
    {"testSGroupData-1a.svg", 426096222U},
    {"testSGroupData-1b.svg", 1688385103U},
    {"testSGroupData-2a.svg", 195363059U},
    {"testSGroupData-2b.svg", 942041938U},
    {"testSGroupData-3a.svg", 62481132U},
    {"testPositionVariation-1.svg", 1347003808U},
    {"testPositionVariation-1b.svg", 3269244452U},
    {"testPositionVariation-2.svg", 473948585U},
    {"testPositionVariation-3.svg", 4039188982U},
    {"testPositionVariation-4.svg", 3407574474U},
    {"testNoAtomLabels-1.svg", 4255907058U},
    {"testNoAtomLabels-2.svg", 3643749531U},
    {"testQueryBonds-1a.svg", 1525751327U},
    {"testQueryBonds-1b.svg", 2239724223U},
    {"testQueryBonds-1c.svg", 2434786487U},
    {"testQueryBonds-2.svg", 3399320861U},
    {"testLinkNodes-2-0.svg", 145749789U},
    {"testLinkNodes-2-30.svg", 3203923109U},
    {"testLinkNodes-2-60.svg", 2004079267U},
    {"testLinkNodes-2-90.svg", 171994932U},
    {"testLinkNodes-2-120.svg", 673333745U},
    {"testLinkNodes-2-150.svg", 51965551U},
    {"testLinkNodes-2-180.svg", 433020402U},
    {"testMolAnnotations-1.svg", 1638024035U},
    {"testMolAnnotations-2a.svg", 3029896996U},
    {"testMolAnnotations-2b.svg", 3110016833U},
    {"testMolAnnotations-2c.svg", 611992302U},
    {"testMolAnnotations-3a.svg", 55379064U},
    {"testMolAnnotations-3b.svg", 936144383U},
    {"testMolAnnotations-3c.svg", 3983292921U},
    {"testMolAnnotations-3d.svg", 748075045U},
    {"testMolAnnotations-4a.svg", 3474490519U},
    {"testLinkNodes-1-0.svg", 3845035394U},
    {"testLinkNodes-1-30.svg", 3207457801U},
    {"testLinkNodes-1-60.svg", 2620138210U},
    {"testLinkNodes-1-90.svg", 1457485851U},
    {"testLinkNodes-1-120.svg", 4267267665U},
    {"testLinkNodes-1-150.svg", 574622776U},
    {"testLinkNodes-1-180.svg", 2541146503U},
    {"testGithub3744.svg", 387800653U},
    {"testAtomLists-1.svg", 1887579391U},
    {"testAtomLists-2.svg", 555139782U},
    {"testIsoDummyIso.svg", 2405371137U},
    {"testNoIsoDummyIso.svg", 748558214U},
    {"testIsoNoDummyIso.svg", 3054263824U},
    {"testNoIsoNoDummyIso.svg", 1185561148U},
    {"testDeuteriumTritium.svg", 1867318569U},
    {"testHydrogenBonds1.svg", 2605974904U},
    {"testHydrogenBonds2.svg", 645414593U},
    {"testGithub3912.1.svg", 2513727029U},
    {"testGithub3912.2.svg", 3814673891U},
    {"testGithub2976.svg", 4194649417U},
    {"testReactionCoords.svg", 798999015U},
    {"testAnnotationColors.svg", 3297011749U},
    {"testGithub4323_1.svg", 2536621192U},
    {"testGithub4323_2.svg", 2120846759U},
    {"testGithub4323_3.svg", 4156867630U},
    {"testGithub4323_4.svg", 3824125601U},
    {"testGithub4238_1.svg", 842841477U},
    {"testGithub4508_1.svg", 2047652713U},
    {"testGithub4508_1b.svg", 2681019776U},
    {"testGithub4508_2.svg", 1382076550U},
    {"testGithub4508_2b.svg", 4005636724U},
    {"testGithub4538.svg", 2550818801U},
    {"testDarkMode.1.svg", 4157562958U},
    {"testMonochrome.1.svg", 482290994U},
    {"testMonochrome.2.svg", 2128285153U},
    {"testAvalon.1.svg", 477303888U},
    {"testCDK.1.svg", 1764612361U},
    {"testGithub4519_1.svg", 736612670U},
    {"testGithub4519_2.svg", 171503813U},
    {"testGithub4519_3.svg", 3396792960U},
    {"testGithub4519_4.svg", 3875957215U},
    {"testBaseFontSize.1a.svg", 1295117205U},
    {"testBaseFontSize.1b.svg", 3595811515U},
    {"testBaseFontSize.2a.svg", 2958687877U},
    {"testBaseFontSize.2b.svg", 1786972332U},
    {"testFlexiCanvas.1a.svg", 2633733362U},
    {"testFlexiCanvas.1b.svg", 1541095928U},
    {"testFlexiCanvas.1c.svg", 3204351481U},
    {"testFlexiCanvas.1d.svg", 1753089731U},
    {"testFlexiCanvas.2.svg", 665664909U},
    {"testSemiFlexiCanvas.1a.svg", 1541095928U},
    {"testSemiFlexiCanvas.1b.svg", 3020732451U},
    {"testSemiFlexiCanvas.1c.svg", 4178696811U},
    {"testFlexiCanvas.3.svg", 3544316588U},
    {"testFlexiCanvas.4a.svg", 1486952473U},
    {"testFlexiCanvas.4b.svg", 1957607740U},
    {"testFlexiCanvas.4c.svg", 3955371857U},
    {"testFlexiCanvas.4d.svg", 1137945621U},
    {"testFlexiCanvas.5a.svg", 3968863584U},
    {"testFlexiCanvas.5b.svg", 649567318U},
    {"testFlexiCanvas.5c.svg", 1826396133U},
    {"testFlexiCanvas.5d.svg", 1730603480U},
    {"testFlexiCanvas.6a.svg", 3085867303U},
    {"testFlexiCanvas.6b.svg", 2819164642U},
    {"testFlexiCanvas.6c.svg", 3085867303U},
    {"testFlexiCanvas.6d.svg", 3085867303U},
    {"testFlexiCanvas.7a.svg", 514767495U},
    {"testFlexiCanvas.7b.svg", 4275125955U},
    {"testFlexiCanvas.7c.svg", 514767495U},
    {"testFlexiCanvas.7d.svg", 514767495U},
    {"testGithub4764.sz1.svg", 3611125861U},
    {"testGithub4764.sz2.svg", 1936114454U},
    {"testGithub4764.sz3.svg", 2712214121U},
    {"testDrawArc1.svg", 3279637525U},
    {"testMetalWedges.svg", 2896721486U},
    {"testVariableLegend_1.svg", 1208675629U},
    {"testVariableLegend_2.svg", 799897710U},
    {"testVariableLegend_3.svg", 2599269417U},
    {"testGithub_5061.svg", 2050932431U},
    {"testGithub_5185.svg", 3800073130U},
    {"testGithub_5269_1.svg", 4160868253U},
    {"testGithub_5269_2.svg", 488926221U},
    {"test_classes_wavy_bonds.svg", 1694809514U},
    {"testGithub_5383_1.svg", 1391972140U},
    {"github5156_1.svg", 2145907703U},
    {"github5156_2.svg", 4184795863U},
    {"github5156_3.svg", 420595965U},
    {"test_molblock_wedges.svg", 1106580037U},
    {"github5383_1.svg", 1815941817U},
    {"acs1996_1.svg", 1111630317U},
    {"acs1996_2.svg", 908745273U},
    {"acs1996_3.svg", 879041204U},
    {"acs1996_4.svg", 1550424006U},
    {"acs1996_5.svg", 3624853279U},
    {"acs1996_6.svg", 3810124161U},
    {"acs1996_7.svg", 1113821459U},
    {"acs1996_8.svg", 4110469272U},
    {"acs1996_9.svg", 231896677U},
    {"acs1996_10.svg", 2229333301U},
    {"acs1996_11.svg", 4107969968U},
    {"acs1996_12.svg", 2930884583U},
    {"test_unspec_stereo.svg", 3923423666U},
    {"light_blue_h_no_label_1.svg", 1615074554U},
    {"test_github_5534.svg", 4139208597U},
    {"bond_highlights_1.svg", 3461339568U},
    {"bond_highlights_2.svg", 4196744632U},
    {"bond_highlights_3.svg", 1492806612U},
    {"bond_highlights_4.svg", 1492806612U},
    {"bond_highlights_5.svg", 1018090699U},
    {"bond_highlights_6.svg", 2808634572U},
    {"bond_highlights_7.svg", 2160801877U},
    {"bond_highlights_8.svg", 3119784980U},
    {"bond_highlights_9.svg", 3999278931U},
    {"testGithub5486_1.svg", 3146085634U},
    {"testGithub5511_1.svg", 3975118836U},
    {"testGithub5511_2.svg", 1730094503U},
    {"test_github5767.svg", 3943519724U},
    {"test_github5704_1.svg", 1676917819U},
    {"test_github5704_2.svg", 2959183882U},
    {"test_github5704_3.svg", 1303839406U},
    {"test_github5704_4.svg", 578468407U},
    {"test_github5943.svg", 1113511714U},
    {"test_github5947.svg", 3122633523U},
    {"test_github5767.svg", 3943519724U},
    {"test_github5949.svg", 420848566U},
    {"test_github5974.svg", 1522014196U},
    {"test_github5963.svg", 941197725U},
    {"test_github6025.svg", 2316385019U},
    {"test_github5963.svg", 941197725U},
    {"test_github6027_1.svg", 1504848694U},
    {"test_github6027_2.svg", 765638922U},
    {"test_complex_query_atoms_1.svg", 1058348348U},
    {"test_complex_query_atoms_2.svg", 3820627663U},
    {"test_complex_query_atoms_3.svg", 2574610745U},
    {"test_complex_query_atoms_4.svg", 2574610745U},
    {"test_complex_query_atoms_5.svg", 2239402605U},
    {"test_complex_query_atoms_6.svg", 2784917732U},
    {"test_complex_query_atoms_7.svg", 4016570948U},
    {"test_complex_query_atoms_8.svg", 1215989604U},
    {"test_complex_query_atoms_9.svg", 774489308U},
    {"test_complex_query_atoms_10.svg", 1888858967U},
    {"test_complex_query_atoms_11.svg", 2202417832U},
    {"test_complex_query_atoms_12.svg", 4094464645U},
    {"test_complex_query_atoms_13.svg", 2082462146U},
    {"test_complex_query_atoms_14.svg", 3306293765U},
    {"test_complex_query_atoms_15.svg", 422354297U},
    {"test_complex_query_atoms_16.svg", 1559600050U},
    {"test_github6041b.svg", 444537337U},
    {"test_github6111_1.svg", 57798875U},
    {"test_github6112.svg", 3278777629U},
    {"test_github6160_1.svg", 1248002094U},
    {"test_github6160_2.svg", 3845316354U},
    {"test_github6160_3.svg", 332436229U},
    {"test_github6170.svg", 1561786551U},
    {"test_getMolSize.svg", 894431558U},
    {"test_github6200_1.svg", 1975293465U},
    {"test_github6200_2.svg", 2658818798U},
    {"test_queryColour_1.svg", 778322651U},
    {"test_queryColour_2.svg", 45913095U},
    {"github6336_1.svg", 612606818U},
    {"github6416.svg", 3814405016U},
    {"test_github6397_1.svg", 4203615821U},
    {"test_github6397_2.svg", 2405824082U},
    {"test_github6397_3.svg", 759740391U},
    {"test_github6397_4.svg", 3123896712U},
    {"test_github6397_5.svg", 148587580U},
    {"test_github6400_1.svg", 2792561051U},
    {"github6504_1.svg", 3649936662U},
    {"github6504_2.svg", 106020287U},
    {"github6569_1.svg", 1698514747U},
    {"github6569_2.svg", 3269796969U},
    {"lasso_highlights_1.svg", 3709434534U},
    {"lasso_highlights_2.svg", 757121560U},
    {"lasso_highlights_3.svg", 556406365U},
    {"lasso_highlights_4.svg", 4148844874U},
    {"lasso_highlights_5.svg", 3920196793U},
    {"lasso_highlights_6.svg", 2113147733U},
    {"lasso_highlights_7.svg", 514868036U},
    {"lasso_highlights_8.svg", 3231367552U},
    {"testGithub6685_1.svg", 1012747673U},
    {"testGithub6685_2.svg", 4003431099U},
    {"testGithub6685_3.svg", 3019254647U},
    {"testGithub6685_4.svg", 1239628830U},
    {"bad_lasso_1.svg", 726527516U},
    {"AtropCanon1.svg", 1371378369U},
    {"AtropManyChiralsEnhanced.svg", 2256768013U},
    {"testGithub6968.svg", 577496246U},
    {"testGithub7036_1.svg", 303621762U},
    {"testGithub7036_2.svg", 2411796331U},
    {"testWedgeNonSingleBonds-1.svg", 2116685919U},
    {"testWedgeNonSingleBonds-2.svg", 1174395532U},
    {"testWedgeNonSingleBonds-3.svg", 2542970771U},
    {"testWedgeNonSingleBonds-4.svg", 700876833U},
    {"testWedgeNonSingleBonds-5.svg", 2012191155U},
    {"testWedgeNonSingleBonds-6.svg", 2517061935U},
    {"testWedgeNonSingleBonds-7.svg", 157069219U},
    {"testWedgeNonSingleBonds-8.svg", 3431784338U},
    {"testWedgingShouldBeOnSingleBond.svg", 1002741488U},
    {"testDuplicateEnhancedStereoLabelsAddAnnotationTrue.svg", 1462263453U},
    {"testDuplicateEnhancedStereoLabelsAddAnnotationFalse.svg", 2980189527U},
    {"testComplexQueryAtomMap.svg", 722421835U},
    {"testGithub_7739_1.svg", 2615562225U},
    {"testGithub_7739_2.svg", 2225049332U},
    {"testGithub_7739_3.svg", 1037942338U},
    {"testGithub_7739_4.svg", 3549083171U},
    {"testGithub_7739_5.svg", 1114216032U},
    {"testHighlightHeteroAtoms_1.svg", 1769258632U},
    {"testHighlightHeteroAtoms_2.svg", 893937335U},
    {"testAtomAbbreviationsClash.svg", 1847939197U},
    {"testBlackAtomsUnderHighlight.svg", 3916069581U},
    {"testSmallReactionCanvas.svg", 2238356155U},
    {"testReactionProductSmoothCorners.svg", 882352670U},
    {"testOptionalAtomListBrackets_1.svg", 4239908626U},
    {"testOptionalAtomListBrackets_2.svg", 3881772214U},
    {"testOptionalAtomListBrackets_3.svg", 2945415850U},
    {"testComponentPadding_1.svg", 2488754565U},
    {"testComponentPadding_2.svg", 2544322406U},
    {"testReactionPanels.svg", 1616500155U},
    {"testAtomAndBondLabels_1.svg", 288825710U},
    {"testAtomAndBondLabels_2.svg", 3501435082U},
    {"testAtomAndBondLabels_3.svg", 3056536314U},
    {"testAtomAndBondLabels_4.svg", 229616498U},
    {"testStandardColoursHighlightedAtoms_1.svg", 4265528904U},
    {"testStandardColoursHighlightedAtoms_2.svg", 2285000572U},
    {"testArrowheads.svg", 3318006834U},
    {"testOffsetHighlightedMols.svg", 3147614756U},
    {"testDrawingExtentsInclude_default.svg", 1604243819U},
    {"testDrawingExtentsIncludeWithHighlights_default.svg", 1595689626U},
    {"testDrawingExtentsInclude_allButHighlights.svg", 1604243819U},
    {"testDrawingExtentsIncludeWithHighlights_allButHighlights.svg",
     436783789U},
    {"test_Github9280_1.0.svg", 1658116840U},
    {"test_Github9280_2.0.svg", 1805554327U},
    {"test_Github9280_0.3.svg", 893100468U},
    {"test_Github9280_0.2.svg", 770838895U}};

// These PNG hashes aren't completely reliable due to floating point cruft,
// but they can still reduce the number of drawings that need visual
// inspection.  At present, the files
// testPNGMetadata_2.png
// give different results on my MBP and Ubuntu 20.04 VM.  The SVGs work
// better because the floats are all output to only 1 decimal place so there
// is a much smaller chance of different systems producing different files.
const std::map<std::string, std::hash_result_t> PNG_HASHES = {
    {"testGithub3226_1.png", 3165135374U},
    {"testGithub3226_2.png", 643975155U},
    {"testGithub3226_3.png", 3119571946U},
    {"testPNGMetadata_1.png", 997629701U},
    {"testPNGMetadata_2.png", 1797853056U},
    {"testHandDrawn-1.png", 3894611804U},
    {"testHandDrawn-2.png", 1443443188U},
    {"testHandDrawn-3.png", 865629432U},
    {"testHandDrawn-4.png", 3919767093U},
    {"testHandDrawn-5.png", 828378555U},
    {"testGithub4323_1.png", 3075787867U},
    {"testGithub4323_3.png", 381907253U},
    {"testFlexiCanvas.2a.png", 2609920321U},
    {"testFlexiCanvas.2b.png", 3615599154U},
    {"testGithub4764.sz1.png", 2179222277U},
    {"testGithub4764.sz2.png", 444262090U},
    {"testGithub4764.sz3.png", 3567162200U},
    {"testGithub4238_1.png", 2623427676U},
    {"github5383_1.png", 2893520928U},
    {"acs1996_1.png", 2329725800U},
    {"acs1996_2.png", 2996350718U},
    {"github6336_1.png", 2958833204U}};

std::hash_result_t hash_file(const std::string &filename) {
  std::ifstream ifs(filename, std::ios_base::binary);
  std::string file_contents(std::istreambuf_iterator<char>{ifs}, {});
  if (filename.substr(filename.length() - 4) == ".svg") {
    // deal with MSDOS newlines.
    file_contents.erase(
        remove(file_contents.begin(), file_contents.end(), '\r'),
        file_contents.end());
  }
  return gboost::hash_range(file_contents.begin(), file_contents.end());
}

void check_file_hash(const std::string &filename,
                     std::hash_result_t exp_hash = 0U) {
  //    std::cout << filename << " : " << hash_file(filename) << "U" <<
  //    std::endl;

  std::map<std::string, std::hash_result_t>::const_iterator it;
  if (filename.substr(filename.length() - 4) == ".svg") {
    it = SVG_HASHES.find(filename);
  } else {
    it = PNG_HASHES.find(filename);
  }
  std::hash_result_t file_hash = hash_file(filename);
  if (exp_hash == 0U) {
    exp_hash = it == SVG_HASHES.end() ? 0U : it->second;
  }
  if (it != SVG_HASHES.end() && file_hash == exp_hash) {
    if (DELETE_WITH_GOOD_HASH) {
      std::remove(filename.c_str());
    }
  } else {
    std::cout << "file " << filename << " gave hash " << file_hash
              << "U not the expected " << exp_hash << "U" << std::endl;
  }
}
}  // namespace

using namespace RDKit;

TEST_CASE("prepareAndDrawMolecule", "[drawing]") {
  SECTION("basics") {
    auto m1 = "C1N[C@@H]2OCC12"_smiles;
    REQUIRE(m1);

    // we will be able to recognize that the prep worked because there
    // will be an H in the output:
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    CHECK(text.find(">H</text>") != std::string::npos);
  }
  SECTION("kekulize") {
    auto m1 = "c1ccccc1"_smiles;
    REQUIRE(m1);

    {
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      CHECK(text.find("stroke-dasharray") == std::string::npos);
    }
    {
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, "", nullptr, nullptr,
                                             nullptr, nullptr, nullptr, -1,
                                             false);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      CHECK(text.find("stroke-dasharray") != std::string::npos);
    }
  }
}

TEST_CASE("tag atoms in SVG", "[drawing][SVG]") {
  SECTION("basics") {
    auto m1 = "C1N[C@@H]2OCC12"_smiles;
    REQUIRE(m1);

    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    std::map<std::string, std::string> actions;
    actions["onclick"] = "alert";
    double radius = 0.2;
    drawer.tagAtoms(*m1, radius, actions);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testAtomTags_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomTags_1.svg");

    CHECK(text.find("<circle") != std::string::npos);
    CHECK(text.find("<circle") != std::string::npos);
    CHECK(text.find("atom-selector") != std::string::npos);
    CHECK(text.find("bond-selector") != std::string::npos);
  }
  SECTION("inject prop to class") {
    auto m1 = "C1N[C@@H]2OCC12"_smiles;
    REQUIRE(m1);

    for (auto atom : m1->atoms()) {
      auto prop = boost::format("__prop_class_atom_%d") % atom->getIdx();
      atom->setProp("_tagClass", prop.str());
    }
    for (auto bond : m1->bonds()) {
      auto prop = boost::format("__prop_class_bond_%d") % bond->getIdx();
      bond->setProp("_tagClass", prop.str());
    }

    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    drawer.tagAtoms(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testAtomTags_2.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomTags_2.svg");

    size_t i = 0;
    size_t c = 0;
    while (true) {
      auto i2 = text.find("__prop_class_atom_", i);
      if (i2 == std::string::npos) {
        break;
      }
      i = i2 + 1;
      c++;
    }
    CHECK(c == 6);

    i = 0;
    c = 0;
    while (true) {
      auto i2 = text.find("__prop_class_bond_", i);
      if (i2 == std::string::npos) {
        break;
      }
      i = i2 + 1;
      c++;
    }
    CHECK(c == 7);
  }
}

TEST_CASE("metadata in SVG", "[drawing][SVG]") {
  SECTION("inject prop to metada") {
    auto m1 = "C1N[C@@H]2OCC12"_smiles;
    REQUIRE(m1);

    for (auto atom : m1->atoms()) {
      auto prop = boost::format("__prop_metadata_atom_%d") % atom->getIdx();
      atom->setProp("_metaData-atom-inject-prop", prop.str());
    }
    for (auto bond : m1->bonds()) {
      auto prop = boost::format("__prop_metadata_bond_%d") % bond->getIdx();
      bond->setProp("_metaData-bond-inject-prop", prop.str());
    }

    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    drawer.addMoleculeMetadata(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testAtomTags_3.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomTags_3.svg");

    size_t i = 0;
    size_t c = 0;
    while (true) {
      auto i2 = text.find("atom-inject-prop=\"__prop_metadata_atom_", i);
      if (i2 == std::string::npos) {
        break;
      }
      i = i2 + 1;
      c++;
    }
    CHECK(c == 6);

    i = 0;
    c = 0;
    while (true) {
      auto i2 = text.find("bond-inject-prop=\"__prop_metadata_bond_", i);
      if (i2 == std::string::npos) {
        break;
      }
      i = i2 + 1;
      c++;
    }
    CHECK(c == 7);
  }
}

TEST_CASE("contour data", "[drawing][conrec]") {
  auto m1 = "C1N[C@@H]2OCC12"_smiles;
  REQUIRE(m1);
  SECTION("grid basics") {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);

    const size_t gridSz = 100;
    auto grid = std::make_unique<double[]>(gridSz * gridSz);
    std::vector<double> xps(gridSz);
    std::vector<double> yps(gridSz);

    double minX = 1000, minY = 1000, maxX = -1000, maxY = -1000;
    const auto conf = m1->getConformer();
    for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
      minX = std::min(minX, conf.getAtomPos(i).x);
      minY = std::min(minY, conf.getAtomPos(i).y);
      maxX = std::max(maxX, conf.getAtomPos(i).x);
      maxY = std::max(maxY, conf.getAtomPos(i).y);
    }
    double x1 = minX - 0.5, y1 = minY - 0.5, x2 = maxX + 0.5, y2 = maxY + 0.5;
    double dx = (x2 - x1) / gridSz, dy = (y2 - y1) / gridSz;
    double maxV = 0.0;
    for (size_t ix = 0; ix < gridSz; ++ix) {
      auto px = x1 + ix * dx;
      xps[ix] = px;
      for (size_t iy = 0; iy < gridSz; ++iy) {
        auto py = y1 + iy * dy;
        if (ix == 0) {
          yps[iy] = py;
        }
        RDGeom::Point2D loc(px, py);
        double val = 0.0;
        for (size_t ia = 0; ia < conf.getNumAtoms(); ++ia) {
          auto dv = loc - RDGeom::Point2D(conf.getAtomPos(ia).x,
                                          conf.getAtomPos(ia).y);
          auto r = dv.length();
          if (r > 0.1) {
            val += 1 / r;
          }
        }
        maxV = std::max(val, maxV);
        grid[ix * gridSz + iy] = val;
      }
    }

    std::vector<double> levels;
    drawer.clearDrawing();
    MolDraw2DUtils::contourAndDrawGrid(drawer, grid.get(), xps, yps, 10, levels,
                                       MolDraw2DUtils::ContourParams(),
                                       m1.get());
    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("contourMol_1.svg");
    outs << text;
    outs.close();
    check_file_hash("contourMol_1.svg");
  }
  SECTION("gaussian basics") {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawOptions().padding = 0.1;

    const auto conf = m1->getConformer();
    std::vector<Point2D> cents(conf.getNumAtoms());
    std::vector<double> weights(conf.getNumAtoms());
    std::vector<double> widths(conf.getNumAtoms());
    for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
      cents[i] = Point2D(conf.getAtomPos(i).x, conf.getAtomPos(i).y);
      weights[i] = 1;
      widths[i] = 0.4 * PeriodicTable::getTable()->getRcovalent(
                            m1->getAtomWithIdx(i)->getAtomicNum());
    }

    std::vector<double> levels;
    drawer.clearDrawing();
    MolDraw2DUtils::contourAndDrawGaussians(
        drawer, cents, weights, widths, 10, levels,
        MolDraw2DUtils::ContourParams(), m1.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("contourMol_2.svg");
    outs << text;
    outs.close();
    check_file_hash("contourMol_2.svg");
  }
  SECTION("gaussian fill") {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawOptions().padding = 0.1;

    const auto conf = m1->getConformer();
    std::vector<Point2D> cents(conf.getNumAtoms());
    std::vector<double> weights(conf.getNumAtoms());
    std::vector<double> widths(conf.getNumAtoms());
    for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
      cents[i] = Point2D(conf.getAtomPos(i).x, conf.getAtomPos(i).y);
      weights[i] = i % 2 ? -.5 : 1;
      widths[i] = 0.4 * PeriodicTable::getTable()->getRcovalent(
                            m1->getAtomWithIdx(i)->getAtomicNum());
    }

    std::vector<double> levels;
    MolDraw2DUtils::ContourParams cps;
    cps.fillGrid = true;
    drawer.clearDrawing();
    MolDraw2DUtils::contourAndDrawGaussians(drawer, cents, weights, widths, 10,
                                            levels, cps, m1.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("contourMol_3.svg");
    outs << text;
    outs.close();
    check_file_hash("contourMol_3.svg");
  }

  SECTION("gaussian fill 2") {
    auto m2 = "C1N[C@@H]2OCC12C=CC"_smiles;
    REQUIRE(m2);

    MolDraw2DSVG drawer(450, 250, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m2);
    drawer.drawOptions().padding = 0.1;

    const auto conf = m2->getConformer();
    std::vector<Point2D> cents(conf.getNumAtoms());
    std::vector<double> weights(conf.getNumAtoms());
    std::vector<double> widths(conf.getNumAtoms());
    for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
      cents[i] = Point2D(conf.getAtomPos(i).x, conf.getAtomPos(i).y);
      weights[i] = i % 2 ? -0.5 : 1;
      widths[i] = 0.3 * PeriodicTable::getTable()->getRcovalent(
                            m2->getAtomWithIdx(i)->getAtomicNum());
    }

    std::vector<double> levels;
    MolDraw2DUtils::ContourParams cps;
    cps.fillGrid = true;
    cps.gridResolution = 0.5;
    drawer.clearDrawing();
    MolDraw2DUtils::contourAndDrawGaussians(drawer, cents, weights, widths, 10,
                                            levels, cps, m2.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m2);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("contourMol_4.svg");
    outs << text;
    outs.close();
    check_file_hash("contourMol_4.svg");
  }

  SECTION("gaussian no fill") {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawOptions().padding = 0.1;

    const auto conf = m1->getConformer();
    std::vector<Point2D> cents(conf.getNumAtoms());
    std::vector<double> weights(conf.getNumAtoms());
    std::vector<double> widths(conf.getNumAtoms());
    for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
      cents[i] = Point2D(conf.getAtomPos(i).x, conf.getAtomPos(i).y);
      weights[i] = i % 2 ? -1 : 1;
      widths[i] = 0.4 * PeriodicTable::getTable()->getRcovalent(
                            m1->getAtomWithIdx(i)->getAtomicNum());
    }

    std::vector<double> levels;
    MolDraw2DUtils::ContourParams cps;
    cps.contourColour = DrawColour(.2, .2, .2);
    drawer.clearDrawing();
    MolDraw2DUtils::contourAndDrawGaussians(drawer, cents, weights, widths, 10,
                                            levels, cps, m1.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("contourMol_5.svg");
    outs << text;
    outs.close();
    check_file_hash("contourMol_5.svg");
  }

  SECTION("Threshold testing") {
    MolDraw2DUtils::prepareMolForDrawing(*m1);

    const auto conf = m1->getConformer();
    std::vector<Point2D> cents(conf.getNumAtoms());
    std::vector<double> weights(conf.getNumAtoms());
    std::vector<double> widths(conf.getNumAtoms());
    for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
      cents[i] = Point2D(conf.getAtomPos(i).x, conf.getAtomPos(i).y);
      weights[i] = i % 2 ? 4 : 1;
      widths[i] = 0.4 * PeriodicTable::getTable()->getRcovalent(
                            m1->getAtomWithIdx(i)->getAtomicNum());
    }

    std::vector<double> levels;
    MolDraw2DUtils::ContourParams cps;
    cps.fillGrid = true;
    cps.colourMap = {
        DrawColour(1.0, 1.0, 1.0),
        DrawColour(0.5, 1.0, 0.5),
        DrawColour(0.0, 1.0, 0.0),
    };

    cps.useFillThreshold = true;

    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().padding = 0.1;
      drawer.clearDrawing();
      MolDraw2DUtils::contourAndDrawGaussians(drawer, cents, weights, widths,
                                              10, levels, cps, m1.get());

      drawer.drawOptions().clearBackground = false;
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("contourMol_6.svg");
      outs << text;
      outs.close();
      check_file_hash("contourMol_6.svg");
    }

    cps.fillThresholdIsFraction = false;
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().padding = 0.1;
      drawer.clearDrawing();
      MolDraw2DUtils::contourAndDrawGaussians(drawer, cents, weights, widths,
                                              10, levels, cps, m1.get());

      drawer.drawOptions().clearBackground = false;
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("contourMol_7.svg");
      outs << text;
      outs.close();
      check_file_hash("contourMol_7.svg");
    }
  }
}

TEST_CASE("dative bonds", "[drawing][organometallics]") {
  SECTION("basics") {
    auto m1 = "N->[Pt]"_smiles;
    REQUIRE(m1);
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testDativeBonds_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testDativeBonds_1.svg");

    std::regex d1(
        "<path class='bond-0 atom-0 atom-1' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)' style='fill:none;fill-rule:evenodd;stroke:#0000FF");
    auto dat1 = *std::sregex_iterator(text.begin(), text.end(), d1);
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(78.2, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(88.0, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(113.4, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(88.0, 0.1));
  }
  SECTION("more complex") {
    auto m1 = "N->1[C@@H]2CCCC[C@H]2N->[Pt]11OC(=O)C(=O)O1"_smiles;
    REQUIRE(m1);
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testDativeBonds_2.svg");
    outs << text;
    outs.close();
    check_file_hash("testDativeBonds_2.svg");

    std::regex d1(
        "<path class='bond-7 atom-7 atom-8' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)' style='fill:none;fill-rule:evenodd;stroke:#0000FF");
    auto dat1 = *std::sregex_iterator(text.begin(), text.end(), d1);
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(100.9, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(77.5, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(95.8, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(84.7, 0.1));
  }
  SECTION("test colours") {
    // the dative bonds point the wrong way, but the point is to test
    // if the tip of the arrow is blue.
    auto m1 = "[Cu++]->1->2.N1CCN2"_smiles;
    REQUIRE(m1);
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testDativeBonds_3.svg");
    outs << text;
    outs.close();
    check_file_hash("testDativeBonds_3.svg");

    std::regex d1(
        "<path class='bond-2 atom-3 atom-4' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)' style='fill:none;fill-rule:evenodd;stroke:#0000FF");
    auto dat1 = *std::sregex_iterator(text.begin(), text.end(), d1);
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(53.5, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(140.2, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(80.7, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(149.0, 0.1));
  }
  SECTION("dative series") {
    auto m1 = "N->1[C@@H]2CCCC[C@H]2N->[Pt]11OC(=O)C(=O)O1"_smiles;
    REQUIRE(m1);
    {
      MolDraw2DSVG drawer(150, 150, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareMolForDrawing(*m1);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testDativeBonds_2a.svg");
      outs << text;
      outs.close();
      check_file_hash("testDativeBonds_2a.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareMolForDrawing(*m1);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testDativeBonds_2b.svg");
      outs << text;
      outs.close();
      check_file_hash("testDativeBonds_2b.svg");
    }
    {
      MolDraw2DSVG drawer(350, 350, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareMolForDrawing(*m1);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testDativeBonds_2c.svg");
      outs << text;
      outs.close();
      check_file_hash("testDativeBonds_2c.svg");
    }
    {
      MolDraw2DSVG drawer(450, 450, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareMolForDrawing(*m1);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testDativeBonds_2d.svg");
      outs << text;
      outs.close();
      check_file_hash("testDativeBonds_2d.svg");
    }
  }
}

TEST_CASE("zero-order bonds", "[drawing][organometallics]") {
  SECTION("basics") {
    auto m1 = "N-[Pt]"_smiles;
    REQUIRE(m1);
    m1->getBondWithIdx(0)->setBondType(Bond::ZERO);
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testZeroOrderBonds_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testZeroOrderBonds_1.svg");

    CHECK(text.find("stroke-dasharray:2,2") != std::string::npos);
  }
}

TEST_CASE("copying drawing options", "[drawing]") {
  auto m1 = "C1N[C@@H]2OCC12"_smiles;
  REQUIRE(m1);
  SECTION("foundations") {
    {
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testFoundations_1.svg");
      outs << text;
      outs.close();
      check_file_hash("testFoundations_1.svg");
      CHECK(text.find("fill:#0000FF' >N</text>") != std::string::npos);
    }
    {
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      assignBWPalette(drawer.drawOptions().atomColourPalette);
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testFoundations_2.svg");
      outs << text;
      outs.close();
      check_file_hash("testFoundations_2.svg");
      CHECK(text.find("fill:#0000FF' >N</text>") == std::string::npos);
      CHECK(text.find("fill:#000000' >N</text>") != std::string::npos);
    }
  }
  SECTION("test") {
    {
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      MolDrawOptions options = drawer.drawOptions();
      assignBWPalette(options.atomColourPalette);
      drawer.drawOptions() = options;
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testTest_1.svg");
      outs << text;
      outs.close();
      check_file_hash("testTest_1.svg");
      CHECK(text.find("fill:#0000FF' >N</text>") == std::string::npos);
      CHECK(text.find("fill:#000000' >N</text>") != std::string::npos);
    }
  }
}

TEST_CASE("bad DrawMolecules() when molecules are not kekulized",
          "[drawing][bug]") {
  auto m1 = "CCN(CC)CCn1nc2c3ccccc3sc3c(CNS(C)(=O)=O)ccc1c32"_smiles;
  REQUIRE(m1);
  SECTION("foundations") {
    MolDraw2DSVG drawer(500, 200, 250, 200, NO_FREETYPE);
    drawer.drawOptions().prepareMolsBeforeDrawing = false;
    RWMol dm1(*m1);
    RWMol dm2(*m1);
    bool kekulize = false;
    MolDraw2DUtils::prepareMolForDrawing(dm1, kekulize);
    kekulize = true;
    MolDraw2DUtils::prepareMolForDrawing(dm2, kekulize);
    MOL_PTR_VECT ms{&dm1, &dm2};
    drawer.drawMolecule(dm1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testKekulizationProblems_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testKekulizationProblems_1.svg");

    // this is a very crude test - really we just need to look at the SVG - but
    // it's better than nothing.
    CHECK(text.find(
              "<path class='bond-18' d='M 169.076,79.056 L 191.285,69.2653' "
              "style='fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:"
              "2px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1;"
              "stroke-dasharray:6,6' />") == std::string::npos);
  }
}
TEST_CASE("draw atom/bond indices", "[drawing]") {
  auto m1 = "C[C@H](F)N"_smiles;
  REQUIRE(m1);
  CIPLabeler::assignCIPLabels(*m1);
  auto m2 = "C[C@@H](F)N"_smiles;
  REQUIRE(m2);
  CIPLabeler::assignCIPLabels(*m2);
  SECTION("foundations") {
    {
      MolDraw2DSVG drawer(250, 200, -1, -1, NO_FREETYPE);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testAtomBondIndices_1.svg");
      outs << text;
      outs.close();
      check_file_hash("testAtomBondIndices_1.svg");
      CHECK(text.find(">1</text>") == std::string::npos);
      CHECK(text.find(">(</text>") == std::string::npos);
      CHECK(text.find(">S</text>") == std::string::npos);
      CHECK(text.find(">)</text>") == std::string::npos);
    }
    {
      MolDraw2DSVG drawer(250, 200, -1, -1, NO_FREETYPE);
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testAtomBondIndices_2.svg");
      outs << text;
      outs.close();
      check_file_hash("testAtomBondIndices_2.svg");
      CHECK(text.find(">1</text>") != std::string::npos);
      // it only appears once though:
      CHECK(text.find(">1</text>", text.find(">1</text>") + 1) ==
            std::string::npos);
      CHECK(text.find("1,(S)") == std::string::npos);
    }
    {
      MolDraw2DSVG drawer(250, 200, -1, -1, NO_FREETYPE);
      drawer.drawOptions().addBondIndices = true;
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testAtomBondIndices_3.svg");
      outs << text;
      outs.close();
      check_file_hash("testAtomBondIndices_3.svg");
      CHECK(text.find(">1</text>") != std::string::npos);
      // it only appears once though:
      CHECK(text.find(">1</text>", text.find(">1</text>") + 1) ==
            std::string::npos);
    }
    {
      MolDraw2DSVG drawer(250, 200, -1, -1, NO_FREETYPE);
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawOptions().addBondIndices = true;
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testAtomBondIndices_4.svg");
      outs << text;
      outs.close();
      check_file_hash("testAtomBondIndices_4.svg");
      CHECK(text.find(">1</text>") != std::string::npos);
      // it appears twice:
      CHECK(text.find(">1</text>", text.find(">1</text>") + 1) !=
            std::string::npos);
    }
    {
      MolDraw2DSVG drawer(250, 200, -1, -1, NO_FREETYPE);
      m1->getAtomWithIdx(2)->setProp(common_properties::atomNote, "foo");
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawOptions().addStereoAnnotation = true;
      drawer.drawMolecule(*m1);
      m1->getAtomWithIdx(2)->clearProp(common_properties::atomNote);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testAtomBondIndices_5.svg");
      outs << text;
      outs.close();
      check_file_hash("testAtomBondIndices_5.svg");
      CHECK(text.find(">1</text>") != std::string::npos);
      CHECK(text.find(">,</text>") != std::string::npos);
      CHECK(text.find(">(</text>") != std::string::npos);
      CHECK(text.find(">S</text>") != std::string::npos);
      CHECK(text.find(")</text>") != std::string::npos);
      CHECK(text.find(">2</text>") != std::string::npos);
      CHECK(text.find(">f</text>") != std::string::npos);
      CHECK(text.find(">o</text>") != std::string::npos);
    }
    {
      // Make sure it works for solid wedges as well.
      MolDraw2DSVG drawer(250, 200, -1, -1, NO_FREETYPE);
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawMolecule(*m2);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testAtomBondIndices_6.svg");
      outs << text;
      outs.close();
      check_file_hash("testAtomBondIndices_6.svg");
      CHECK(text.find(">1</text>") != std::string::npos);
      // it only appears once though:
      CHECK(text.find(">1</text>", text.find(">1</text>") + 1) ==
            std::string::npos);
      CHECK(text.find("1,(S)") == std::string::npos);
    }
  }
}

TEST_CASE("Github #3226: Lines in wedge bonds being drawn too closely together",
          "[drawing]") {
  auto m1 =
      "C[C@H](C1=C(C=CC(=C1Cl)F)Cl)OC2=C(N=CC(=C2)C3=CN(N=C3)C4CCNCC4)N"_smiles;
  REQUIRE(m1);
  SECTION("larger SVG") {
    {
      MolDraw2DSVG drawer(450, 400);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub3226_1.svg");
      outs << text;
      outs.close();
      check_file_hash("testGithub3226_1.svg");
      std::vector<std::string> tkns;
      boost::algorithm::find_all(tkns, text, "bond-0");
      CHECK(tkns.size() == 9);
    }
  }
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("larger PNG") {
    {
      MolDraw2DCairo drawer(450, 400);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub3226_1.png");
      check_file_hash("testGithub3226_1.png");
    }
  }
#endif
  SECTION("smaller SVG") {
    {
      MolDraw2DSVG drawer(200, 150);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub3226_2.svg");
      outs << text;
      outs.close();
      check_file_hash("testGithub3226_2.svg");
      std::vector<std::string> tkns;
      boost::algorithm::find_all(tkns, text, "bond-0");
      CHECK(tkns.size() == 4);
    }
  }
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("smaller PNG") {
    {
      MolDraw2DCairo drawer(200, 150);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub3226_2.png");
      check_file_hash("testGithub3226_2.png");
    }
  }
#endif
  SECTION("middle SVG") {
    {
      MolDraw2DSVG drawer(300, 200);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub3226_3.svg");
      outs << text;
      outs.close();
      check_file_hash("testGithub3226_3.svg");
      std::vector<std::string> tkns;
      boost::algorithm::find_all(tkns, text, "bond-0");
      CHECK(tkns.size() == 6);
    }
  }
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("middle PNG") {
    {
      MolDraw2DCairo drawer(250, 200);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub3226_3.png");
      check_file_hash("testGithub3226_3.png");
    }
  }
#endif
}

TEST_CASE("github #3258: ", "[drawing][bug]") {
  auto m1 = "CCN"_smiles;
  REQUIRE(m1);
  SECTION("foundations") {
    MolDraw2DSVG drawer(500, 200, 250, 200, NO_FREETYPE);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    RWMol dm1(*m1);
    RWMol dm2(*m1);
    MOL_PTR_VECT ms{&dm1, &dm2};
    drawer.drawMolecules(ms);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    CHECK(text.find(">,</text>") == std::string::npos);
    CHECK(!dm1.hasProp("_atomIndicesAdded"));
    CHECK(!dm1.hasProp("_bondIndicesAdded"));
  }
}

#ifdef RDK_BUILD_CAIRO_SUPPORT
TEST_CASE("adding png metadata", "[drawing][png]") {
  SECTION("molecule") {
    auto m1 = R"CTAB(
  Mrv2014 08172015242D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 3 2 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 2.31 -1.3337 0 0
M  V30 2 C 3.6437 -2.1037 0 0
M  V30 3 O 4.9774 -1.3337 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m1);
    {
      MolDraw2DCairo drawer(250, 200);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      auto png = drawer.getDrawingText();
      drawer.writeDrawingText("testPNGMetadata_1.png");
      check_file_hash("testPNGMetadata_1.png");
      CHECK(png.find(PNGData::smilesTag) != std::string::npos);
      CHECK(png.find(PNGData::molTag) != std::string::npos);
      CHECK(png.find(PNGData::pklTag) != std::string::npos);
      std::unique_ptr<ROMol> newmol(PNGStringToMol(png));
      REQUIRE(newmol);
      CHECK(MolToCXSmiles(*m1) == MolToCXSmiles(*newmol));
    }
    {  // disable metadata output
      MolDraw2DCairo drawer(250, 200);
      drawer.drawOptions().includeMetadata = false;
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      auto png = drawer.getDrawingText();
      CHECK(png.find(PNGData::smilesTag) == std::string::npos);
      CHECK(png.find(PNGData::molTag) == std::string::npos);
      CHECK(png.find(PNGData::pklTag) == std::string::npos);
    }
    {  // draw multiple molecules
      MolDraw2DCairo drawer(250, 200);
      drawer.drawMolecule(*m1);
      drawer.drawMolecule(*m1);
      drawer.finishDrawing();
      auto png = drawer.getDrawingText();
      CHECK(png.find(PNGData::smilesTag) != std::string::npos);
      CHECK(png.find(PNGData::molTag) != std::string::npos);
      CHECK(png.find(PNGData::pklTag) != std::string::npos);
      CHECK(png.find(PNGData::smilesTag + "1") != std::string::npos);
      CHECK(png.find(PNGData::molTag + "1") != std::string::npos);
      CHECK(png.find(PNGData::pklTag + "1") != std::string::npos);
    }
  }
  SECTION("reaction") {
    std::unique_ptr<ChemicalReaction> rxn(RxnSmartsToChemicalReaction(
        "[N:1][C:2][C:3](=[O:4])[O:5].[N:6][C:7][C:8](=[O:9])[O:10]>>[N:1]1[C:"
        "2][C:3](=[O:4])[N:6][C:7][C:8]1=[O:9].[O:5][O:10]"));
    REQUIRE(rxn);
    {
      MolDraw2DCairo drawer(600, 200);
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      auto png = drawer.getDrawingText();
      drawer.writeDrawingText("testPNGMetadata_2.png");
      check_file_hash("testPNGMetadata_2.png");
      CHECK(png.find(PNGData::smilesTag) == std::string::npos);
      CHECK(png.find(PNGData::molTag) == std::string::npos);
      CHECK(png.find(PNGData::pklTag) == std::string::npos);
      CHECK(png.find(PNGData::rxnPklTag) != std::string::npos);
      CHECK(png.find(PNGData::rxnSmartsTag) != std::string::npos);
      std::unique_ptr<ChemicalReaction> rxn2(PNGStringToChemicalReaction(png));
      REQUIRE(rxn2);
      CHECK(ChemicalReactionToRxnSmarts(*rxn) ==
            ChemicalReactionToRxnSmarts(*rxn2));
    }
    {  // disable metadata
      MolDraw2DCairo drawer(600, 200);
      drawer.drawOptions().includeMetadata = false;
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      auto png = drawer.getDrawingText();
      CHECK(png.find(PNGData::smilesTag) == std::string::npos);
      CHECK(png.find(PNGData::molTag) == std::string::npos);
      CHECK(png.find(PNGData::pklTag) == std::string::npos);
      CHECK(png.find(PNGData::rxnPklTag) == std::string::npos);
      CHECK(png.find(PNGData::rxnSmartsTag) == std::string::npos);
    }
  }
}

#endif

TEST_CASE(
    "github #3392: prepareMolForDrawing() incorrectly adds chiral Hs if no "
    "ring info is present",
    "[bug]") {
  SECTION("foundations") {
    SmilesParserParams ps;
    ps.sanitize = false;
    ps.removeHs = false;
    std::unique_ptr<RWMol> m1(SmilesToMol("C[C@H](F)Cl", ps));
    REQUIRE(m1);
    m1->updatePropertyCache();
    CHECK(m1->getNumAtoms() == 4);
    const bool kekulize = false;
    const bool addChiralHs = true;
    MolDraw2DUtils::prepareMolForDrawing(*m1, kekulize, addChiralHs);
    CHECK(m1->getNumAtoms() == 4);
  }
}

TEST_CASE(
    "github #3369: support new CIP code and StereoGroups in addStereoAnnotations()") {
  auto m1 =
      "C[C@@H]1N[C@H](C)[C@@H]([C@H](C)[C@@H]1C)C1[C@@H](C)O[C@@H](C)[C@@H](C)[C@H]1C/C=C/C |a:5,o1:1,8,o2:14,16,&1:11,18,&2:3,6,r|"_smiles;
  REQUIRE(m1);

  SECTION("works with the drawing code") {
    MolDraw2DSVG drawer(300, 250);
    RWMol dm1(*m1);
    Chirality::addStereoAnnotations(dm1);
    drawer.drawMolecule(dm1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub3369_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testGithub3369_1.svg");
  }
}

TEST_CASE("includeRadicals", "[options]") {
  SECTION("basics") {
    auto m = "[O][C]"_smiles;
    REQUIRE(m);
    int panelHeight = -1;
    int panelWidth = -1;
    bool noFreeType = true;
    {
      MolDraw2DSVG drawer(250, 200, panelWidth, panelHeight, noFreeType);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testIncludeRadicals_1a.svg");
      outs << text;
      outs.close();
      check_file_hash("testIncludeRadicals_1a.svg");
      CHECK(text.find("<path class='atom-0' d='M") != std::string::npos);
    }
    {
      MolDraw2DSVG drawer(250, 200, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().includeRadicals = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testIncludeRadicals_1b.svg");
      outs << text;
      outs.close();
      check_file_hash("testIncludeRadicals_1b.svg");
      CHECK(text.find("<path class='atom-0' d='M") == std::string::npos);
    }
  }
}

TEST_CASE("including legend in drawing results in offset drawing later",
          "[bug]") {
  SECTION("basics") {
    auto m = "c1ccccc1"_smiles;
    REQUIRE(m);
    MolDraw2DUtils::prepareMolForDrawing(*m);
    auto &conf = m->getConformer();
    std::vector<Point2D> polyg;
    for (const auto &pt : conf.getPositions()) {
      polyg.emplace_back(pt);
    }
    MolDraw2DSVG drawer(350, 300);
    drawer.drawMolecule(*m, "molecule legend");
    drawer.setFillPolys(true);
    drawer.setColour(DrawColour(1.0, 0.3, 1.0));
    drawer.drawPolygon(polyg);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testLegendsAndDrawing-1.svg");
    outs << text;
    outs.close();
    outs.close();
    check_file_hash("testLegendsAndDrawing-1.svg");

    // make sure the polygon starts at a bond
    CHECK(text.find("<path class='bond-0 atom-0 atom-1' d='M 315.3,136.5") !=
          std::string::npos);
    CHECK(text.find("<path d='M 315.3,136.5") != std::string::npos);
  }
}

TEST_CASE("Github #3577", "[bug]") {
  SECTION("basics") {
    auto m = "CCC"_smiles;
    REQUIRE(m);
    MolDraw2DUtils::prepareMolForDrawing(*m);
    m->getAtomWithIdx(1)->setProp("atomNote", "CCC");
    m->getAtomWithIdx(2)->setProp("atomNote", "ccc");
    m->getBondWithIdx(0)->setProp("bondNote", "CCC");

    MolDraw2DSVG drawer(350, 300);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testGithub3577-1.svg");
    outs << text;
    outs.close();
    check_file_hash("testGithub3577-1.svg");
  }
}
TEST_CASE("hand drawn", "[play]") {
  SECTION("basics") {
    auto m =
        "CC[CH](C)[CH]1NC(=O)[CH](Cc2ccc(O)cc2)NC(=O)[CH](N)CSSC[CH](C(=O)N2CCC[CH]2C(=O)N[CH](CC(C)C)C(=O)NCC(N)=O)NC(=O)[CH](CC(N)=O)NC(=O)[CH](CCC(N)=O)NC1=O"_smiles;
    REQUIRE(m);
    RDDepict::preferCoordGen = true;
    MolDraw2DUtils::prepareMolForDrawing(*m);

    std::string fName = getenv("RDBASE");
    fName += "/Data/Fonts/ComicNeue-Regular.ttf";

    {
      MolDraw2DSVG drawer(450, 400);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m, "Oxytocin (flat)");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testHandDrawn-1.svg");
      outs << text;
      outs.close();
      check_file_hash("testHandDrawn-1.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(450, 400);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m, "Oxytocin (flat)");
      drawer.finishDrawing();
      drawer.writeDrawingText("testHandDrawn-1.png");
      check_file_hash("testHandDrawn-1.png");
    }
#endif
  }
  SECTION("with chirality") {
    auto m =
        "CC[C@H](C)[C@@H]1NC(=O)[C@H](Cc2ccc(O)cc2)NC(=O)[C@@H](N)CSSC[C@@H](C(=O)N2CCC[C@H]2C(=O)N[C@@H](CC(C)C)C(=O)NCC(N)=O)NC(=O)[C@H](CC(N)=O)NC(=O)[C@H](CCC(N)=O)NC1=O"_smiles;
    REQUIRE(m);
    RDDepict::preferCoordGen = true;
    MolDraw2DUtils::prepareMolForDrawing(*m);

    std::string fName = getenv("RDBASE");
    fName += "/Data/Fonts/ComicNeue-Regular.ttf";

    {
      MolDraw2DSVG drawer(450, 400);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m, "Oxytocin");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testHandDrawn-2.svg");
      outs << text;
      outs.close();
      check_file_hash("testHandDrawn-2.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(450, 400);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m, "Oxytocin");
      drawer.finishDrawing();
      drawer.writeDrawingText("testHandDrawn-2.png");
      check_file_hash("testHandDrawn-2.png");
    }
#endif
  }
  SECTION("smaller") {
    auto m = "N=c1nc([C@H]2NCCCC2)cc(N)n1O"_smiles;
    REQUIRE(m);
    RDDepict::preferCoordGen = true;
    MolDraw2DUtils::prepareMolForDrawing(*m);

    std::string fName = getenv("RDBASE");
    fName += "/Data/Fonts/ComicNeue-Regular.ttf";

    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testHandDrawn-3.svg");
      outs << text;
      outs.close();
      check_file_hash("testHandDrawn-3.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(350, 300);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      drawer.writeDrawingText("testHandDrawn-3.png");
      check_file_hash("testHandDrawn-3.png");
    }
#endif
  }
  SECTION("another one") {
    auto m =
        "CCCc1nn(C)c2c(=O)nc(-c3cc(S(=O)(=O)N4CCN(C)CC4)ccc3OCC)[nH]c12"_smiles;
    REQUIRE(m);
    RDDepict::preferCoordGen = true;
    MolDraw2DUtils::prepareMolForDrawing(*m);

    std::string fName = getenv("RDBASE");
    fName += "/Data/Fonts/ComicNeue-Regular.ttf";

    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testHandDrawn-4.svg");
      outs << text;
      outs.close();
      check_file_hash("testHandDrawn-4.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(350, 300);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      drawer.writeDrawingText("testHandDrawn-4.png");
      check_file_hash("testHandDrawn-4.png");
    }
#endif
  }
  SECTION("large") {
    auto m =
        "CC[C@H](C)[C@@H](C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(=O)N)C(=O)N[C@@H](C)C(=O)N[C@@H](Cc1ccc(cc1)O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCCN)C(=O)NCC(=O)N[C@@H](CCC(=O)N)C(=O)O)NC(=O)[C@H](C)NC(=O)[C@H](CC(=O)N)NC(=O)[C@H](CCCCN)NC(=O)[C@H](Cc2ccccc2)NC(=O)[C@H](CC(C)C)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](C(C)C)NC(=O)[C@H](CC(C)C)NC(=O)[C@@H]3CCCN3C(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CCC(=O)N)NC(=O)[C@H](CO)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CCC(=O)N)NC(=O)[C@H](CO)NC(=O)[C@H]([C@@H](C)O)NC(=O)[C@H](CCSC)NC(=O)[C@H](Cc4ccccc4)NC(=O)CNC(=O)CNC(=O)[C@H](Cc5ccc(cc5)O)N"_smiles;
    REQUIRE(m);
    RDDepict::preferCoordGen = true;
    MolDraw2DUtils::prepareMolForDrawing(*m);

    std::string fName = getenv("RDBASE");
    fName += "/Data/Fonts/ComicNeue-Regular.ttf";

    {
      MolDraw2DSVG drawer(900, 450);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testHandDrawn-5a.svg");
      outs << text;
      outs.close();
      check_file_hash("testHandDrawn-5a.svg");
    }
    {
      MolDraw2DSVG drawer(900, 450);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testHandDrawn-5b.svg");
      outs << text;
      outs.close();
      check_file_hash("testHandDrawn-5b.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(900, 450);
      drawer.drawOptions().fontFile = fName;
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      drawer.writeDrawingText("testHandDrawn-5.png");
      check_file_hash("testHandDrawn-5.png");
    }
#endif
  }
}

TEST_CASE("drawMoleculeBrackets", "[extras]") {
  SECTION("basics") {
    auto m = R"CTAB(
  ACCLDraw11042015112D

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 5 4 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C 7 -6.7813 0 0 
M  V30 2 C 8.0229 -6.1907 0 0 CFG=3 
M  V30 3 C 8.0229 -5.0092 0 0 
M  V30 4 C 9.046 -6.7814 0 0 
M  V30 5 C 10.0692 -6.1907 0 0 
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2 
M  V30 2 1 2 3 
M  V30 3 1 2 4 
M  V30 4 1 4 5 
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 SRU 1 ATOMS=(3 3 2 4) XBONDS=(2 1 4) BRKXYZ=(9 7.51 -7.08 0 7.51 -
M  V30 -5.9 0 0 0 0) BRKXYZ=(9 9.56 -5.9 0 9.56 -7.08 0 0 0 0) -
M  V30 CONNECT=HT LABEL=n 
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-1a.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-1a.svg");
    }
    {  // rotation
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().rotate = 90;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-1b.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-1b.svg");
    }
    {  // centering
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().centreMoleculesBeforeDrawing = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-1c.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-1c.svg");
    }
    {  // rotation + centering
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().centreMoleculesBeforeDrawing = true;
      drawer.drawOptions().rotate = 90;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-1d.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-1d.svg");
    }
    {  // rotation
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().rotate = 180;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-1e.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-1e.svg");
    }
  }
  SECTION("three brackets") {
    auto m = R"CTAB(three brackets
  Mrv2014 11052006542D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 6 5 1 0 0
M  V30 BEGIN ATOM
M  V30 1 * -1.375 3.1667 0 0
M  V30 2 C -0.0413 3.9367 0 0
M  V30 3 C 1.2924 3.1667 0 0
M  V30 4 * 2.626 3.9367 0 0
M  V30 5 C 0.0003 5.6017 0 0
M  V30 6 * 1.334 6.3717 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 1 2 5
M  V30 5 1 5 6
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 SRU 0 ATOMS=(3 2 3 5) XBONDS=(3 1 3 5) BRKXYZ=(9 0.0875 6.7189 0 -
M  V30 1.0115 5.1185 0 0 0 0) BRKXYZ=(9 1.3795 4.2839 0 2.3035 2.6835 0 0 0 -
M  V30 0) BRKXYZ=(9 -0.1285 2.8194 0 -1.0525 4.4198 0 0 0 0) CONNECT=HT -
M  V30 LABEL=n
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-2a.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-2a.svg");
    }
    {  // rotation
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().rotate = 90;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-2b.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-2b.svg");
    }
    {  // centering
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().centreMoleculesBeforeDrawing = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-2c.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-2c.svg");
    }
    {  // rotation + centering
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().centreMoleculesBeforeDrawing = true;
      drawer.drawOptions().rotate = 90;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-2d.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-2d.svg");
    }
  }
  SECTION("ChEBI 59342") {
    // thanks to John Mayfield for pointing out the example
    auto m = R"CTAB(ChEBI59342 
Marvin  05041012302D          

 29 30  0  0  1  0            999 V2000
   10.1615   -7.7974    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.7305   -6.9763    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.7309   -7.8004    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    9.4464   -8.2109    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    8.0153   -8.2225    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    9.4464   -9.0437    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    8.0138   -9.0500    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    8.7293   -9.4606    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
   10.1669   -9.4529    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.3058   -9.4590    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.7368  -10.2801    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    8.0263  -10.6992    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.0339  -11.5241    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    7.3081  -10.2933    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.7305   -5.3264    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    8.0159   -5.7369    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    8.0159   -6.5618    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    7.2936   -5.3263    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.2936   -6.9762    0.0000 C   0  0  2  0  0  0  0  0  0  0  0  0
    6.5751   -5.7368    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    6.5751   -6.5618    0.0000 C   0  0  1  0  0  0  0  0  0  0  0  0
    7.2973   -7.8049    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.8681   -5.3263    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.8680   -6.9762    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    5.1510   -6.5684    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.4392   -6.9856    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
    5.1455   -5.7435    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   10.4142   -5.3560    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0
   11.5590   -7.8297    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0
  3  2  1  6  0  0  0
  3  4  1  0  0  0  0
  3  5  1  0  0  0  0
  4  6  1  0  0  0  0
  4  1  1  1  0  0  0
  5  7  1  0  0  0  0
  6  8  1  0  0  0  0
  6  9  1  1  0  0  0
  7 10  1  1  0  0  0
  8 11  1  6  0  0  0
  7  8  1  0  0  0  0
 13 12  1  0  0  0  0
 14 12  2  0  0  0  0
 11 12  1  0  0  0  0
 16 15  1  6  0  0  0
 16 17  1  0  0  0  0
 16 18  1  0  0  0  0
 17 19  1  0  0  0  0
 17  2  1  1  0  0  0
 18 20  1  0  0  0  0
 19 21  1  0  0  0  0
 19 22  1  1  0  0  0
 20 23  1  1  0  0  0
 21 24  1  6  0  0  0
 20 21  1  0  0  0  0
 26 25  1  0  0  0  0
 27 25  2  0  0  0  0
 24 25  1  0  0  0  0
 15 28  1  0  0  0  0
  1 29  1  0  0  0  0
M  STY  1   1 SRU
M  SCN  1   1 HT 
M  SAL   1 15   1   2   3   4   5   6   7   8   9  10  11  12  13  14  15
M  SAL   1 12  16  17  18  19  20  21  22  23  24  25  26  27
M  SDI   1  4    9.4310   -4.9261    9.4165   -5.7510
M  SDI   1  4   10.7464   -7.3983   10.7274   -8.2231
M  SBL   1  2  30  29
M  SMT   1 n
M  END)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-3a.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-3a.svg");
    }
  }
  SECTION("pathological bracket orientation") {
    {  // including the bonds
      auto m = R"CTAB(bogus
  Mrv2014 11202009512D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 8 1 0 1
M  V30 BEGIN ATOM
M  V30 1 C 23.5462 -14.464 0 0
M  V30 2 C 20.8231 -13.0254 0 0
M  V30 3 C 20.8776 -14.5628 0 0
M  V30 4 C 22.2391 -15.2819 0 0
M  V30 5 C 16.2969 -9.9426 0 0
M  V30 6 C 14.963 -10.7089 0 0
M  V30 7 C 19.463 -12.2987 0 0
M  V30 8 * 19.4398 -9.9979 0 0
M  V30 9 * 26.1554 -14.4332 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 3 4
M  V30 2 1 6 7
M  V30 3 1 5 8
M  V30 4 1 1 9
M  V30 5 1 7 2
M  V30 6 1 6 5
M  V30 7 1 4 1
M  V30 8 1 3 2
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 SRU 0 ATOMS=(7 4 3 7 6 5 2 1) XBONDS=(2 3 4) BRKXYZ=(9 17.6045 -
M  V30 -9.1954 0 17.5775 -10.7352 0 0 0 0) BRKXYZ=(9 24.6113 -13.6813 0 -
M  V30 24.6296 -15.2213 0 0 0 0) CONNECT=HT LABEL=n
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-4a.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-4a.svg");
    }

    {  // no bonds in the sgroup, the bracket should point the other way
       // (towards the majority of the atoms in the sgroup)
      auto m = R"CTAB(bogus
  Mrv2014 11202009512D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 8 1 0 1
M  V30 BEGIN ATOM
M  V30 1 C 23.5462 -14.464 0 0
M  V30 2 C 20.8231 -13.0254 0 0
M  V30 3 C 20.8776 -14.5628 0 0
M  V30 4 C 22.2391 -15.2819 0 0
M  V30 5 C 16.2969 -9.9426 0 0
M  V30 6 C 14.963 -10.7089 0 0
M  V30 7 C 19.463 -12.2987 0 0
M  V30 8 * 19.4398 -9.9979 0 0
M  V30 9 * 26.1554 -14.4332 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 3 4
M  V30 2 1 6 7
M  V30 3 1 5 8
M  V30 4 1 1 9
M  V30 5 1 7 2
M  V30 6 1 6 5
M  V30 7 1 4 1
M  V30 8 1 3 2
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 SRU 0 ATOMS=(7 4 3 7 6 5 2 1) BRKXYZ=(9 17.6045 -
M  V30 -9.1954 0 17.5775 -10.7352 0 0 0 0) BRKXYZ=(9 24.6113 -13.6813 0 -
M  V30 24.6296 -15.2213 0 0 0 0) CONNECT=HT LABEL=n
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-4b.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-4b.svg");
    }
  }
  SECTION("comic brackets (no font though)") {
    auto m = R"CTAB(
  ACCLDraw11042015112D

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 5 4 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C 7 -6.7813 0 0 
M  V30 2 C 8.0229 -6.1907 0 0 CFG=3 
M  V30 3 C 8.0229 -5.0092 0 0 
M  V30 4 C 9.046 -6.7814 0 0 
M  V30 5 C 10.0692 -6.1907 0 0 
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2 
M  V30 2 1 2 3 
M  V30 3 1 2 4 
M  V30 4 1 4 5 
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 SRU 1 ATOMS=(3 3 2 4) XBONDS=(2 1 4) BRKXYZ=(9 7.51 -7.08 0 7.51 -
M  V30 -5.9 0 0 0 0) BRKXYZ=(9 9.56 -5.9 0 9.56 -7.08 0 0 0 0) -
M  V30 CONNECT=HT LABEL=n 
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-5a.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-5a.svg");
    }
  }
  SECTION("Github5768 - rightmost bracket wrong way round.)") {
    auto m = R"CTAB(
  Marvin  10140911012D

 19 18  0  0  0  0            999 V2000
   -2.0296    1.6372    0.0000 Si  0  0  0  0  0  0  0  0  0  0  0  0
   -2.0296    2.4622    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0296    0.8122    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8546    1.6372    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0
   -1.2046    1.6372    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3796    1.6372    0.0000 Si  0  0  0  0  0  0  0  0  0  0  0  0
    0.4454    1.6372    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3796    0.8122    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3796    2.4622    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3349    0.3997    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0494    0.8122    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.7638    0.3997    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.2704    1.6372    0.0000 *   0  0  0  0  0  0  0  0  0  0  0  0
    2.4783    0.8122    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1928    0.3996    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.9072    0.8121    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.6217    0.3996    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.3362    0.8120    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.0506    0.3995    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1  3  1  0  0  0  0
  1  4  1  0  0  0  0
  1  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  6  8  1  0  0  0  0
  6  9  1  0  0  0  0
  8 10  1  0  0  0  0
 10 11  1  0  0  0  0
  7 13  1  0  0  0  0
 11 12  1  0  0  0  0
 12 14  1  0  0  0  0
 14 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  1  0  0  0  0
 17 18  1  0  0  0  0
 18 19  1  0  0  0  0
M  STY  2   1 SRU   2 SRU
M  SCN  1   1 HT
M  SAL   1  4   1   2   3   5
M  SDI   1  4   -0.8649    2.0497   -0.8649    1.2247
M  SDI   1  4   -2.3693    1.2247   -2.3693    2.0497
M  SBL   1  2   3   5
M  SMT   1 n
M  SCN  1   2 HT
M  SAL   2 13   6   7   8   9  10  11  12  14  15  16  17  18  19
M  SDI   2  4    0.7851    2.0497    0.7851    1.2247
M  SDI   2  4   -0.7193    1.2247   -0.7193    2.0497
M  SBL   2  2   5  11
M  SMT   2 m
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testBrackets-5768.svg");
      outs << text;
      outs.close();
      check_file_hash("testBrackets-5768.svg");
    }
  }
}

#ifdef RDK_BUILD_CAIRO_SUPPORT
TEST_CASE("github #3543: Error adding PNG metadata when kekulize=False",
          "[bug][metadata][png]") {
  SECTION("basics") {
    auto m = "n1cccc1"_smarts;
    m->updatePropertyCache(false);
    MolDraw2DCairo drawer(350, 300);
    bool kekulize = false;
    MolDraw2DUtils::prepareMolForDrawing(*m, kekulize);
    drawer.drawOptions().prepareMolsBeforeDrawing = false;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto png = drawer.getDrawingText();
  }
  SECTION("as reported") {
    auto m = "n1cnc2c(n)ncnc12"_smarts;
    m->updatePropertyCache(false);
    MolDraw2DCairo drawer(350, 300);
    bool kekulize = false;
    MolDraw2DUtils::prepareMolForDrawing(*m, kekulize);
    drawer.drawOptions().prepareMolsBeforeDrawing = false;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto png = drawer.getDrawingText();
  }
}
#endif

TEST_CASE("SGroup Data") {
  SECTION("ABS") {
    auto m = R"CTAB(
  Mrv2014 12072015352D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 9 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C -6.5833 4.3317 0 0
M  V30 2 C -7.917 3.5617 0 0
M  V30 3 C -7.917 2.0216 0 0
M  V30 4 C -6.5833 1.2516 0 0
M  V30 5 C -5.2497 2.0216 0 0
M  V30 6 C -5.2497 3.5617 0 0
M  V30 7 C -3.916 4.3317 0 0
M  V30 8 O -3.916 5.8717 0 0
M  V30 9 O -2.5823 3.5617 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 6 7
M  V30 8 2 7 8
M  V30 9 1 7 9
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 9) FIELDNAME=pKa -
M  V30 FIELDDISP="   -2.2073    2.3950    DAU   ALL  0       0" -
M  V30 MRV_FIELDDISP=0 FIELDDATA=4.2
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m, "abs");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testSGroupData-1a.svg");
      outs << text;
      outs.close();
      check_file_hash("testSGroupData-1a.svg");
    }
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().centreMoleculesBeforeDrawing = true;
      drawer.drawOptions().rotate = 90;
      drawer.drawMolecule(*m, "centered, rotated");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testSGroupData-1b.svg");
      outs << text;
      outs.close();
      check_file_hash("testSGroupData-1b.svg");
    }
  }
  SECTION("REL") {
    auto m = R"CTAB(
  Mrv2014 12072015352D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 9 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C -6.5833 4.3317 0 0
M  V30 2 C -7.917 3.5617 0 0
M  V30 3 C -7.917 2.0216 0 0
M  V30 4 C -6.5833 1.2516 0 0
M  V30 5 C -5.2497 2.0216 0 0
M  V30 6 C -5.2497 3.5617 0 0
M  V30 7 C -3.916 4.3317 0 0
M  V30 8 O -3.916 5.8717 0 0
M  V30 9 O -2.5823 3.5617 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 6 7
M  V30 8 2 7 8
M  V30 9 1 7 9
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 9) FIELDNAME=pKa -
M  V30 FIELDDISP="    0.2000    0.2000    DRU   ALL  0       0" -
M  V30 MRV_FIELDDISP=0 FIELDDATA=4.2
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m, "rel");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testSGroupData-2a.svg");
      outs << text;
      outs.close();
      check_file_hash("testSGroupData-2a.svg");
    }
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().centreMoleculesBeforeDrawing = true;
      drawer.drawOptions().rotate = 90;
      drawer.drawMolecule(*m, "rel, centered, rotated");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testSGroupData-2b.svg");
      outs << text;
      outs.close();
      check_file_hash("testSGroupData-2b.svg");
    }
  }
  {
    auto m = R"CTAB(random example found on internet
   JSDraw204221719232D

 20 21  0  0  0  0              0 V2000
   10.1710   -5.6553    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.9428   -4.2996    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    8.6110   -5.6647    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   10.9591   -7.0015    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   12.5190   -6.9921    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.3072   -8.3384    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   13.2909   -5.6364    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.5028   -4.2902    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.2746   -2.9345    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   14.8508   -5.6270    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   15.6226   -4.2713    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   20.3026   -4.2431    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   19.5307   -5.5987    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   21.8625   -4.2336    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   19.5144   -2.8968    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   17.9544   -2.9062    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   17.1663   -1.5600    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   17.1826   -4.2619    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   17.9708   -5.6082    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   17.1989   -6.9638    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1  3  2  0  0  0  0
  1  4  1  0  0  0  0
  4  5  2  0  0  0  0
  5  6  1  0  0  0  0
  5  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  2  0  0  0  0
  8  2  1  0  0  0  0
  7 10  1  0  0  0  0
 10 11  2  0  0  0  0
 12 13  1  0  0  0  0
 12 14  2  0  0  0  0
 12 15  1  0  0  0  0
 15 16  1  0  0  0  0
 16 17  2  0  0  0  0
 16 18  1  0  0  0  0
 18 19  1  0  0  0  0
 19 20  1  0  0  0  0
 19 13  2  0  0  0  0
 11 18  1  0  0  0  0
M  STY  1   1 DAT
M  SDT   1 UNKNOWN                        F
M  SDD   1    16.0856   -8.1573    DA    ALL  1       5
M  SED   1 Ni-complex
M  END)CTAB"_ctab;
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testSGroupData-3a.svg");
      outs << text;
      outs.close();
      check_file_hash("testSGroupData-3a.svg");
    }
  }
}

TEST_CASE("getSGroupDataLabels", "[extras]") {
  SECTION("ABS position") {
    // FIELDDISP with absolute ('A') position
    auto m = R"CTAB(
  Mrv2014 12072015352D

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 9 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C -6.5833 4.3317 0 0
M  V30 2 C -7.917 3.5617 0 0
M  V30 3 C -7.917 2.0216 0 0
M  V30 4 C -6.5833 1.2516 0 0
M  V30 5 C -5.2497 2.0216 0 0
M  V30 6 C -5.2497 3.5617 0 0
M  V30 7 C -3.916 4.3317 0 0
M  V30 8 O -3.916 5.8717 0 0
M  V30 9 O -2.5823 3.5617 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 6 7
M  V30 8 2 7 8
M  V30 9 1 7 9
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 9) FIELDNAME=pKa -
M  V30 FIELDDISP="   -2.2073    2.3950    DAU   ALL  0       0" -
M  V30 MRV_FIELDDISP=0 FIELDDATA=4.2
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    auto lbls = MolDraw2D_detail::getSGroupDataLabels(*m);
    REQUIRE(lbls.size() == 1);
    CHECK(lbls[0].text == "4.2");
    CHECK(lbls[0].positioned);
    CHECK(lbls[0].atomIdx == 8);
    // ABS position: (-2.2073, -2.3950) — y is negated in molecule coords
    CHECK_THAT(lbls[0].pos.x, Catch::Matchers::WithinAbs(-2.2073, 0.001));
    CHECK_THAT(lbls[0].pos.y, Catch::Matchers::WithinAbs(-2.3950, 0.001));
  }
  SECTION("no FIELDDISP falls back to atom position") {
    auto m = R"CTAB(
  Mrv2014 12072015352D

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 9 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C -6.5833 4.3317 0 0
M  V30 2 C -7.917 3.5617 0 0
M  V30 3 C -7.917 2.0216 0 0
M  V30 4 C -6.5833 1.2516 0 0
M  V30 5 C -5.2497 2.0216 0 0
M  V30 6 C -5.2497 3.5617 0 0
M  V30 7 C -3.916 4.3317 0 0
M  V30 8 O -3.916 5.8717 0 0
M  V30 9 O -2.5823 3.5617 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 6 7
M  V30 8 2 7 8
M  V30 9 1 7 9
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(5 2 4 5 3 1) FIELDNAME="Lambda Max" FIELDINFO=nm -
M  V30 FIELDDATA="2222"
M  V30 END SGROUP
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    auto lbls = MolDraw2D_detail::getSGroupDataLabels(*m);
    REQUIRE(lbls.size() == 1);
    CHECK(lbls[0].text == "2222");
    // no FIELDDISP -> positioned=false, pos is first atom's conformer position
    CHECK(!lbls[0].positioned);
    CHECK(lbls[0].atomIdx == 1);  // first atom in ATOMS list is atom 2 (idx 1)
    // falls back to atom 2 (idx 1) position: (-7.917, 3.5617)
    CHECK_THAT(lbls[0].pos.x, Catch::Matchers::WithinAbs(-7.917, 0.001));
    CHECK_THAT(lbls[0].pos.y, Catch::Matchers::WithinAbs(3.5617, 0.001));
  }
}

TEST_CASE("position variation bonds", "[extras]") {
  SECTION("simple") {
    auto m = R"CTAB(
  Mrv2014 12092006072D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 8 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -4.7083 4.915 0 0
M  V30 2 C -6.042 4.145 0 0
M  V30 3 C -6.042 2.605 0 0
M  V30 4 C -4.7083 1.835 0 0
M  V30 5 C -3.3747 2.605 0 0
M  V30 6 C -3.3747 4.145 0 0
M  V30 7 * -3.8192 3.8883 0 0
M  V30 8 O -3.8192 6.1983 0 0
M  V30 9 C -2.4855 6.9683 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 7 8 ENDPTS=(3 1 6 5) ATTACH=ANY
M  V30 8 1 8 9
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m, "variations");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testPositionVariation-1.svg");
      outs << text;
      outs.close();
      check_file_hash("testPositionVariation-1.svg");
    }
    {  // make sure comic mode doesn't screw this up
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().comicMode = true;
      drawer.drawMolecule(*m, "comic variations");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testPositionVariation-1b.svg");
      outs << text;
      outs.close();
      check_file_hash("testPositionVariation-1b.svg");
    }
  }
  SECTION("multiple") {
    auto m = R"CTAB(
  Mrv2014 12092006082D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 15 14 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -4.7083 4.915 0 0
M  V30 2 C -6.042 4.145 0 0
M  V30 3 C -6.042 2.605 0 0
M  V30 4 C -4.7083 1.835 0 0
M  V30 5 C -3.3747 2.605 0 0
M  V30 6 C -3.3747 4.145 0 0
M  V30 7 * -3.8192 3.8883 0 0
M  V30 8 O -3.8192 6.1983 0 0
M  V30 9 C -2.4855 6.9683 0 0
M  V30 10 C -7.3757 4.915 0 0
M  V30 11 C -8.7093 4.145 0 0
M  V30 12 C -8.7093 2.605 0 0
M  V30 13 C -7.3757 1.835 0 0
M  V30 14 * -8.7093 3.375 0 0
M  V30 15 O -10.2922 3.375 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 7 8 ENDPTS=(3 1 6 5) ATTACH=ANY
M  V30 8 1 8 9
M  V30 9 1 10 11
M  V30 10 2 11 12
M  V30 11 1 12 13
M  V30 12 2 10 2
M  V30 13 2 13 3
M  V30 14 1 14 15 ENDPTS=(2 11 12) ATTACH=ANY
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m, "multiple variations");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testPositionVariation-2.svg");
      outs << text;
      outs.close();
      check_file_hash("testPositionVariation-2.svg");
    }
  }
  SECTION("non-contiguous") {
    auto m = R"CTAB(
  Mrv2014 12092006102D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 9 8 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -0.875 8.7484 0 0
M  V30 2 C -2.2087 7.9784 0 0
M  V30 3 C -2.2087 6.4383 0 0
M  V30 4 C -0.875 5.6683 0 0
M  V30 5 C 0.4587 6.4383 0 0
M  V30 6 C 0.4587 7.9784 0 0
M  V30 7 * -0.4304 6.9517 0 0
M  V30 8 O -0.4304 4.6417 0 0
M  V30 9 C -1.7641 3.8717 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 7 8 ENDPTS=(3 1 5 4) ATTACH=ANY
M  V30 8 1 8 9
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m, "non-contiguous atoms");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testPositionVariation-3.svg");
      outs << text;
      outs.close();
      check_file_hash("testPositionVariation-3.svg");
    }
  }
  SECTION("larger mol") {
    auto m = R"CTAB(
  Mrv2014 12092009152D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 23 24 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -0.875 8.7484 0 0
M  V30 2 C -2.2087 7.9784 0 0
M  V30 3 C -2.2087 6.4383 0 0
M  V30 4 C -0.875 5.6683 0 0
M  V30 5 N 0.4587 6.4383 0 0
M  V30 6 C 0.4587 7.9784 0 0
M  V30 7 * -0.4304 6.9517 0 0
M  V30 8 O -0.4304 4.6417 0 0
M  V30 9 C -1.7641 3.8717 0 0
M  V30 10 C -3.5423 8.7484 0 0
M  V30 11 C -4.876 7.9784 0 0
M  V30 12 C -4.876 6.4383 0 0
M  V30 13 C -3.5423 5.6683 0 0
M  V30 14 C -4.876 11.0584 0 0
M  V30 15 C -6.2097 10.2884 0 0
M  V30 16 C -6.2097 8.7484 0 0
M  V30 17 C -3.5423 10.2884 0 0
M  V30 18 C -6.2097 13.3685 0 0
M  V30 19 C -7.5433 12.5985 0 0
M  V30 20 C -7.5433 11.0584 0 0
M  V30 21 C -4.876 12.5985 0 0
M  V30 22 * -5.5428 9.1334 0 0
M  V30 23 C -7.3712 7.7304 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 2 1 6
M  V30 7 1 7 8 ENDPTS=(3 1 4 5) ATTACH=ANY
M  V30 8 1 8 9
M  V30 9 2 10 11
M  V30 10 1 11 12
M  V30 11 2 12 13
M  V30 12 1 10 2
M  V30 13 1 13 3
M  V30 14 1 14 15
M  V30 15 2 15 16
M  V30 16 2 14 17
M  V30 17 1 10 17
M  V30 18 1 16 11
M  V30 19 1 18 19
M  V30 20 2 19 20
M  V30 21 2 18 21
M  V30 22 1 14 21
M  V30 23 1 20 15
M  V30 24 1 22 23 ENDPTS=(2 15 11) ATTACH=ANY
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(250, 200);
      drawer.drawMolecule(*m, "smaller");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testPositionVariation-4.svg");
      outs << text;
      outs.close();
      check_file_hash("testPositionVariation-4.svg");
    }
  }
}

TEST_CASE("disable atom labels", "[feature]") {
  SECTION("basics") {
    {
      auto m = "NCC(=O)O"_smiles;
      MolDraw2DSVG drawer(350, 300);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      drawer.drawOptions().noAtomLabels = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testNoAtomLabels-1.svg");
      outs << text;
      outs.close();
      check_file_hash("testNoAtomLabels-1.svg");
      CHECK(text.find("class='atom-0") == std::string::npos);
      CHECK(text.find("class='atom-3") == std::string::npos);
    }
    {
      auto m = "F[C@H](O)C[C@@H](Cl)I"_smiles;
      MolDraw2DSVG drawer(350, 300);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      drawer.drawOptions().noAtomLabels = true;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testNoAtomLabels-2.svg");
      outs << text;
      outs.close();
      check_file_hash("testNoAtomLabels-2.svg");
    }
  }
}

TEST_CASE("drawing query bonds", "[queries]") {
  SECTION("basics") {
    auto m = R"CTAB(
  Mrv2014 12072005332D          
  
  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 14 14 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 3.7917 -2.96 0 0
M  V30 2 C 2.458 -3.73 0 0
M  V30 3 C 2.458 -5.27 0 0
M  V30 4 C 3.7917 -6.04 0 0
M  V30 5 C 5.1253 -5.27 0 0
M  V30 6 C 5.1253 -3.73 0 0
M  V30 7 C 6.459 -2.96 0 0
M  V30 8 C 3.7917 -7.58 0 0
M  V30 9 C 4.8806 -8.669 0 0
M  V30 10 C 4.482 -10.1565 0 0
M  V30 11 C 6.459 -6.04 0 0
M  V30 12 C 7.7927 -5.27 0 0
M  V30 13 C 9.1263 -6.0399 0 0
M  V30 14 C 9.1263 -7.5799 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 2 3
M  V30 2 1 4 5
M  V30 3 1 1 6
M  V30 4 5 1 2
M  V30 5 6 5 6
M  V30 6 7 3 4
M  V30 7 8 6 7
M  V30 8 1 4 8
M  V30 9 1 8 9 TOPO=1
M  V30 10 1 9 10 TOPO=2
M  V30 11 1 5 11
M  V30 12 1 12 13
M  V30 13 2 11 12 TOPO=1
M  V30 14 2 13 14 TOPO=2
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testQueryBonds-1a.svg");
      outs << text;
      outs.close();
      check_file_hash("testQueryBonds-1a.svg");
    }
    {
      MolDraw2DSVG drawer(350, 300);
      m->getBondWithIdx(3)->setProp("bondNote", "S/D");
      m->getBondWithIdx(4)->setProp("bondNote", "S/A");
      m->getBondWithIdx(5)->setProp("bondNote", "D/A");
      m->getBondWithIdx(6)->setProp("bondNote", "Any");
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testQueryBonds-1b.svg");
      outs << text;
      outs.close();
      check_file_hash("testQueryBonds-1b.svg");
    }
    {
      MolDraw2DSVG drawer(350, 300);
      std::vector<int> highlightAtoms = {0, 1, 2, 3, 4, 5, 7, 8, 9};
      std::vector<int> highlightBonds = {0, 3, 2, 4, 1, 5, 8, 9};

      drawer.drawMolecule(*m, "", &highlightAtoms, &highlightBonds);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testQueryBonds-1c.svg");
      outs << text;
      outs.close();
      check_file_hash("testQueryBonds-1c.svg");
    }
  }
  SECTION("smaller drawing") {
    auto m = R"CTAB(
  Mrv2014 12012004302D          
  
  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 26 29 0 0 0
M  V30 BEGIN ATOM
M  V30 1 O 3.7917 -2.96 0 0
M  V30 2 C 2.458 -3.73 0 0
M  V30 3 C 2.458 -5.27 0 0
M  V30 4 N 3.7917 -6.04 0 0
M  V30 5 N 5.1253 -5.27 0 0
M  V30 6 C 5.1253 -3.73 0 0
M  V30 7 C 6.459 -2.96 0 0
M  V30 8 C 3.7917 -7.58 0 0
M  V30 9 C 4.8806 -8.669 0 0
M  V30 10 C 4.482 -10.1565 0 0
M  V30 11 C 1.1243 -2.9599 0 0
M  V30 12 C -0.2093 -3.73 0 0
M  V30 13 C -0.2093 -5.27 0 0
M  V30 14 C 1.1243 -6.04 0 0
M  V30 15 C -0.2093 -0.6499 0 0
M  V30 16 C -1.543 -1.4199 0 0
M  V30 17 C -1.543 -2.9599 0 0
M  V30 18 C 1.1243 -1.4199 0 0
M  V30 19 C -2.8767 -0.6499 0 0
M  V30 20 C -4.2103 -1.4199 0 0
M  V30 21 C -4.2103 -2.9599 0 0
M  V30 22 C -2.8767 -3.73 0 0
M  V30 23 C -5.544 -3.7299 0 0
M  V30 24 C -6.8777 -2.9599 0 0
M  V30 25 C -8.2114 -3.7299 0 0
M  V30 26 C -9.5451 -2.9599 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 2 3
M  V30 2 1 4 5
M  V30 3 1 1 6
M  V30 4 5 1 2
M  V30 5 6 5 6
M  V30 6 7 3 4
M  V30 7 8 6 7
M  V30 8 1 4 8
M  V30 9 1 8 9 TOPO=1
M  V30 10 1 9 10 TOPO=2
M  V30 11 1 12 13
M  V30 12 1 13 14
M  V30 13 1 14 3
M  V30 14 1 11 2
M  V30 15 1 15 16
M  V30 16 1 16 17
M  V30 17 2 15 18
M  V30 18 1 11 18
M  V30 19 1 17 12
M  V30 20 2 12 11
M  V30 21 1 19 20
M  V30 22 2 20 21
M  V30 23 1 21 22
M  V30 24 2 19 16
M  V30 25 2 22 17
M  V30 26 1 21 23
M  V30 27 1 23 24
M  V30 28 1 24 25
M  V30 29 1 25 26
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(250, 200);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testQueryBonds-2.svg");
      outs << text;
      outs.close();
      check_file_hash("testQueryBonds-2.svg");
    }
  }
  SECTION("two linknodes") {
    auto m = R"CTAB(two linknodes
  Mrv2014 07072016412D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 7 7 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 8.25 12.1847 0 0
M  V30 2 C 6.9164 12.9547 0 0
M  V30 3 C 7.2366 14.4611 0 0
M  V30 4 C 8.7681 14.622 0 0
M  V30 5 C 9.3945 13.2151 0 0
M  V30 6 O 8.25 10.6447 0 0
M  V30 7 F 9.5382 15.9557 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 4 5
M  V30 4 1 1 5
M  V30 5 1 3 4
M  V30 6 1 1 6
M  V30 7 1 4 7
M  V30 END BOND
M  V30 LINKNODE 1 3 2 1 2 1 5
M  V30 LINKNODE 1 4 2 4 3 4 5
M  V30 END CTAB
M  END)CTAB"_ctab;
    std::vector<int> rotns = {0, 30, 60, 90, 120, 150, 180};
    for (auto rotn : rotns) {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().rotate = (double)rotn;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::string filename(
          (boost::format("testLinkNodes-2-%d.svg") % rotn).str());
      std::ofstream outs(filename);
      outs << text;
      outs.close();
      check_file_hash(filename);
    }
  }
}

TEST_CASE("molecule annotations", "[extra]") {
  int panelHeight = -1;
  int panelWidth = -1;
  bool noFreeType = false;
  SECTION("basics") {
    auto m = "NCC(=O)O"_smiles;
    MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
    MolDraw2DUtils::prepareMolForDrawing(*m);
    m->setProp(common_properties::molNote, "molecule note");
    drawer.drawMolecule(*m, "with note");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testMolAnnotations-1.svg");
    outs << text;
    outs.close();
    check_file_hash("testMolAnnotations-1.svg");
    CHECK(text.find("class='note'") != std::string::npos);
  }
  SECTION("chiral flag") {
    auto m = R"CTAB(
  Mrv2014 12152012512D          
 
  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 8 8 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C -0.6317 0.6787 0 0 CFG=2
M  V30 2 C -1.7207 1.7677 0 0
M  V30 3 C 0.4571 1.7677 0 0
M  V30 4 C -0.6317 2.8566 0 0 CFG=1
M  V30 5 C 0.1729 4.1698 0 0
M  V30 6 N -0.5619 5.5231 0 0
M  V30 7 C -1.4364 4.1698 0 0
M  V30 8 C -0.6316 -0.8613 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2 CFG=3
M  V30 2 1 1 3
M  V30 3 1 4 3
M  V30 4 1 4 2
M  V30 5 1 4 5
M  V30 6 1 5 6
M  V30 7 1 4 7 CFG=1
M  V30 8 1 1 8
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    {
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawMolecule(*m, "chiral flag set, option disabled");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testMolAnnotations-2a.svg");
      outs << text;
      outs.close();
      check_file_hash("testMolAnnotations-2a.svg");
      CHECK(text.find("class='note'") == std::string::npos);
    }
    {
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().includeChiralFlagLabel = true;
      drawer.drawMolecule(*m, "chiral flag set, option enabled");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testMolAnnotations-2b.svg");
      outs << text;
      outs.close();
      check_file_hash("testMolAnnotations-2b.svg");
      CHECK(text.find("class='note'") != std::string::npos);
    }
    {
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().includeChiralFlagLabel = true;
      m->clearProp(common_properties::_MolFileChiralFlag);
      drawer.drawMolecule(*m, "chiral flag not set, option enabled");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testMolAnnotations-2c.svg");
      outs << text;
      outs.close();
      check_file_hash("testMolAnnotations-2c.svg");
      CHECK(text.find("class='note'") == std::string::npos);
    }
  }
  SECTION("simplified stereo 1") {
    {
      auto m = "C[C@H](F)[C@@H](F)[C@@H](C)Cl |o1:3,5,1|"_smiles;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      drawer.drawOptions().addStereoAnnotation = true;
      drawer.drawMolecule(*m, "enhanced no flag");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testMolAnnotations-3a.svg");
      outs << text;
      outs.close();
      check_file_hash("testMolAnnotations-3a.svg");
    }
    {
      auto m = "C[C@H](F)[C@@H](F)[C@@H](C)Cl |o1:3,5,1|"_smiles;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      drawer.drawOptions().addStereoAnnotation = true;
      drawer.drawOptions().simplifiedStereoGroupLabel = true;
      drawer.drawMolecule(*m, "enhanced with flag");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testMolAnnotations-3b.svg");
      outs << text;
      outs.close();
      check_file_hash("testMolAnnotations-3b.svg");
    }
    {
      auto m = "C[C@H](F)[C@@H](F)[C@@H](C)Cl |&1:3,5,1|"_smiles;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      drawer.drawOptions().addStereoAnnotation = true;
      drawer.drawOptions().simplifiedStereoGroupLabel = true;
      drawer.drawMolecule(*m, "enhanced & with flag");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testMolAnnotations-3c.svg");
      outs << text;
      outs.close();
      check_file_hash("testMolAnnotations-3c.svg");
    }
  }
  SECTION("simplified stereo 2") {
    auto m = "C[C@H](F)[C@@H](F)[C@@H](C)Cl |o1:3,5,o2:1|"_smiles;
    MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawOptions().addStereoAnnotation = true;
    drawer.drawOptions().simplifiedStereoGroupLabel = true;
    MolDraw2DUtils::prepareMolForDrawing(*m);
    drawer.drawMolecule(*m, "multi-groups");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testMolAnnotations-3d.svg");
    outs << text;
    outs.close();
    check_file_hash("testMolAnnotations-3d.svg");
  }
  SECTION("label placement") {
    auto m = R"CTAB(
  Mrv2014 12162004412D          
 
  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 16 15 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -9.2917 3.5833 0 0
M  V30 2 C -7.958 4.3533 0 0 CFG=2
M  V30 3 C -6.6243 3.5833 0 0 CFG=1
M  V30 4 C -5.2906 4.3533 0 0 CFG=2
M  V30 5 Cl -7.958 5.8933 0 0
M  V30 6 F -6.6243 2.0433 0 0
M  V30 7 F -3.957 3.5833 0 0
M  V30 8 C -5.2906 5.8933 0 0
M  V30 9 C -3.957 6.6633 0 0
M  V30 10 C -3.957 8.2033 0 0
M  V30 11 C -2.6233 8.9733 0 0
M  V30 12 C -2.6233 5.8933 0 0
M  V30 13 C -5.2906 8.9733 0 0
M  V30 14 C -2.6233 10.5133 0 0
M  V30 15 C -1.2896 8.2033 0 0
M  V30 16 C -1.2896 6.6633 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 1 2 5 CFG=1
M  V30 5 1 3 6 CFG=1
M  V30 6 1 4 7 CFG=1
M  V30 7 1 4 8
M  V30 8 1 8 9
M  V30 9 1 9 10
M  V30 10 1 10 11
M  V30 11 1 9 12
M  V30 12 1 10 13
M  V30 13 1 11 14
M  V30 14 1 11 15
M  V30 15 1 12 16
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEREL1 ATOMS=(3 2 3 4)
M  V30 END COLLECTION
M  V30 END CTAB
M  END
)CTAB"_ctab;
    MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawOptions().addStereoAnnotation = true;
    drawer.drawOptions().simplifiedStereoGroupLabel = true;
    drawer.drawMolecule(*m, "label crowding");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testMolAnnotations-4a.svg");
    outs << text;
    outs.close();
    check_file_hash("testMolAnnotations-4a.svg");
  }
}

TEST_CASE("draw link nodes", "[extras]") {
  SECTION("one linknode") {
    auto m = R"CTAB(one linknode
  Mrv2007 06222005102D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 6 6 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 8.25 12.1847 0 0
M  V30 2 C 6.9164 12.9547 0 0
M  V30 3 C 6.9164 14.4947 0 0
M  V30 4 C 9.5836 14.4947 0 0
M  V30 5 C 9.5836 12.9547 0 0
M  V30 6 O 8.25 10.6447 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 4 5
M  V30 4 1 1 5
M  V30 5 1 3 4
M  V30 6 1 1 6
M  V30 END BOND
M  V30 LINKNODE 1 4 2 1 2 1 5
M  V30 END CTAB
M  END)CTAB"_ctab;
    std::vector<int> rotns = {0, 30, 60, 90, 120, 150, 180};
    for (auto rotn : rotns) {
      MolDraw2DSVG drawer(350, 300);
      drawer.drawOptions().rotate = (double)rotn;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs(
          (boost::format("testLinkNodes-1-%d.svg") % rotn).str());
      outs << text;
      outs.close();
      check_file_hash((boost::format("testLinkNodes-1-%d.svg") % rotn).str());
    }
  }
}

TEST_CASE("Github #3744: Double bonds incorrectly drawn outside the ring",
          "[drawing]") {
  SECTION("SVG") {
    ROMOL_SPTR m1(MolBlockToMol(R"CTAB(
     RDKit          2D

  6  6  0  0  0  0  0  0  0  0999 V2000
    0.0684   -1.2135    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4949   -0.7500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4949    0.7500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0684    1.2135    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8133    0.0000    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3133   -0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0
  2  3  1  0
  3  4  2  0
  4  5  1  0
  5  6  1  0
  5  1  1  0
M  END)CTAB"));
    REQUIRE(m1);
    MolDraw2DSVG drawer(400, 300);
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub3744.svg");
    outs << text;
    outs.close();
    check_file_hash("testGithub3744.svg");
    std::vector<std::string> bond0;
    std::vector<std::string> bond2;
    std::istringstream ss(text);
    std::string line;
    while (std::getline(ss, line)) {
      if (line.find("bond-0") != std::string::npos) {
        bond0.push_back(line);
      } else if (line.find("bond-2") != std::string::npos) {
        bond2.push_back(line);
      }
    }
    CHECK(bond0.size() == 2);
    CHECK(bond2.size() == 2);
    std::regex regex(
        "^.*d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)\\s+L\\s+(\\d+\\.\\d+),(\\d+\\."
        "\\d+)'.*$");
    std::smatch bond0OuterMatch;
    CHECK(std::regex_match(bond0[0], bond0OuterMatch, regex));
    CHECK(bond0OuterMatch.size() == 5);
    std::smatch bond0InnerMatch;
    CHECK(std::regex_match(bond0[1], bond0InnerMatch, regex));
    CHECK(bond0InnerMatch.size() == 5);
    std::smatch bond2OuterMatch;
    CHECK(std::regex_match(bond2[0], bond2OuterMatch, regex));
    CHECK(bond2OuterMatch.size() == 5);
    std::smatch bond2InnerMatch;
    CHECK(std::regex_match(bond2[1], bond2InnerMatch, regex));
    CHECK(bond2InnerMatch.size() == 5);
    RDGeom::Point2D bond0InnerCtd(
        RDGeom::Point2D(std::stof(bond0InnerMatch[1]),
                        std::stof(bond0InnerMatch[2])) +
        RDGeom::Point2D(std::stof(bond0InnerMatch[3]),
                        std::stof(bond0InnerMatch[4])) /
            2.0);
    RDGeom::Point2D bond0OuterCtd(
        RDGeom::Point2D(std::stof(bond0OuterMatch[1]),
                        std::stof(bond0OuterMatch[2])) +
        RDGeom::Point2D(std::stof(bond0OuterMatch[3]),
                        std::stof(bond0OuterMatch[4])) /
            2.0);
    RDGeom::Point2D bond2InnerCtd(
        RDGeom::Point2D(std::stof(bond2InnerMatch[1]),
                        std::stof(bond2InnerMatch[2])) +
        RDGeom::Point2D(std::stof(bond2InnerMatch[3]),
                        std::stof(bond2InnerMatch[4])) /
            2.0);
    RDGeom::Point2D bond2OuterCtd(
        RDGeom::Point2D(std::stof(bond2OuterMatch[1]),
                        std::stof(bond2OuterMatch[2])) +
        RDGeom::Point2D(std::stof(bond2OuterMatch[3]),
                        std::stof(bond2OuterMatch[4])) /
            2.0);
    // we look at the two double bonds of pyrrole
    // we check that the ratio between the distance of the centroids of the
    // outer bonds and the distance of the centroids of the inner bonds is at
    // least 1.275, otherwise the inner bonds are not actually inside the ring.
    float outerBondsDistance = (bond0OuterCtd - bond2OuterCtd).length();
    float innerBondsDistance = (bond0InnerCtd - bond2InnerCtd).length();
    CHECK(outerBondsDistance / innerBondsDistance > 1.275f);
  }
}

TEST_CASE("draw atom list queries", "[extras]") {
  SECTION("atom list") {
    auto m = R"CTAB(
  Mrv2102 02112115002D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 3 3 0 0 0
M  V30 BEGIN ATOM
M  V30 1 [N,O,S] 9.2083 12.8058 0 0
M  V30 2 C 8.4383 11.4721 0 0
M  V30 3 C 9.9783 11.4721 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 3 1
M  V30 3 1 2 3
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    MolDraw2DSVG drawer(350, 300);
    drawer.drawMolecule(*m, "atom list");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAtomLists-1.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomLists-1.svg");
  }

  SECTION("NOT atom list") {
    auto m = R"CTAB(
  Mrv2102 02112115032D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 3 3 0 0 0
M  V30 BEGIN ATOM
M  V30 1 "NOT [N,O,S]" 9.2083 12.8058 0 0
M  V30 2 C 8.4383 11.4721 0 0
M  V30 3 C 9.9783 11.4721 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 3 1
M  V30 3 1 2 3
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    MolDraw2DSVG drawer(350, 300);
    drawer.drawMolecule(*m, "NOT atom list");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAtomLists-2.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomLists-2.svg");
  }
}

TEST_CASE("test the options that toggle isotope labels", "[drawing]") {
  SECTION("test all permutations") {
    auto m = "[1*]c1cc([2*])c([3*])c[14c]1"_smiles;
    REQUIRE(m);
    std::regex regex(R"regex(<text\s+.*>\d</text>)regex");
    std::smatch match;
    std::string line;
    {
      MolDraw2DSVG drawer(300, 300, -1, -1, true);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      std::string textIsoDummyIso = drawer.getDrawingText();
      std::ofstream outs("testIsoDummyIso.svg");
      outs << textIsoDummyIso;
      outs.close();
      check_file_hash("testIsoDummyIso.svg");
      size_t nIsoDummyIso = std::distance(
          std::sregex_token_iterator(textIsoDummyIso.begin(),
                                     textIsoDummyIso.end(), regex),
          std::sregex_token_iterator());
      CHECK(nIsoDummyIso == 5);
    }
    {
      MolDraw2DSVG drawer(300, 300, -1, -1, true);
      drawer.drawOptions().isotopeLabels = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      std::string textNoIsoDummyIso = drawer.getDrawingText();
      std::ofstream outs("testNoIsoDummyIso.svg");
      outs << textNoIsoDummyIso;
      outs.close();
      check_file_hash("testNoIsoDummyIso.svg");
      size_t nNoIsoDummyIso = std::distance(
          std::sregex_token_iterator(textNoIsoDummyIso.begin(),
                                     textNoIsoDummyIso.end(), regex, 1),
          std::sregex_token_iterator());
      CHECK(nNoIsoDummyIso == 3);
    }
    {
      MolDraw2DSVG drawer(300, 300, -1, -1, true);
      drawer.drawOptions().dummyIsotopeLabels = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      std::string textIsoNoDummyIso = drawer.getDrawingText();
      std::ofstream outs("testIsoNoDummyIso.svg");
      outs << textIsoNoDummyIso;
      outs.close();
      check_file_hash("testIsoNoDummyIso.svg");
      size_t nIsoNoDummyIso = std::distance(
          std::sregex_token_iterator(textIsoNoDummyIso.begin(),
                                     textIsoNoDummyIso.end(), regex, 1),
          std::sregex_token_iterator());
      CHECK(nIsoNoDummyIso == 2);
    }
    {
      MolDraw2DSVG drawer(300, 300, -1, -1, true);
      drawer.drawOptions().isotopeLabels = false;
      drawer.drawOptions().dummyIsotopeLabels = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      std::string textNoIsoNoDummyIso = drawer.getDrawingText();
      std::ofstream outs("testNoIsoNoDummyIso.svg");
      outs << textNoIsoNoDummyIso;
      outs.close();
      check_file_hash("testNoIsoNoDummyIso.svg");
      size_t nNoIsoNoDummyIso = std::distance(
          std::sregex_token_iterator(textNoIsoNoDummyIso.begin(),
                                     textNoIsoNoDummyIso.end(), regex, 1),
          std::sregex_token_iterator());
      CHECK(nNoIsoNoDummyIso == 0);
    }
  }
  SECTION("test that D/T show up even if isotope labels are hidden") {
    auto m = "C([1H])([2H])([3H])[H]"_smiles;
    std::regex regex(R"regex(<text\s+.*>[DT]</text>)regex");
    std::smatch match;
    REQUIRE(m);
    std::string line;
    MolDraw2DSVG drawer(300, 300, -1, -1, true);
    drawer.drawOptions().isotopeLabels = false;
    drawer.drawOptions().dummyIsotopeLabels = false;
    drawer.drawOptions().atomLabelDeuteriumTritium = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string textDeuteriumTritium = drawer.getDrawingText();
    std::ofstream outs("testDeuteriumTritium.svg");
    outs << textDeuteriumTritium;
    outs.close();
    check_file_hash("testDeuteriumTritium.svg");
    size_t nDeuteriumTritium = std::distance(
        std::sregex_token_iterator(textDeuteriumTritium.begin(),
                                   textDeuteriumTritium.end(), regex, 1),
        std::sregex_token_iterator());
    CHECK(nDeuteriumTritium == 2);
  }
}

TEST_CASE("draw hydrogen bonds", "[drawing]") {
  SECTION("basics") {
    auto m = R"CTAB(
  Mrv2014 03022114422D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 8 8 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -5.4583 -0.125 0 0
M  V30 2 C -4.1247 0.645 0 0
M  V30 3 C -2.791 -0.125 0 0
M  V30 4 C -1.4573 0.645 0 0
M  V30 5 O -2.791 -1.665 0 0
M  V30 6 C -6.792 0.645 0 0
M  V30 7 O -5.4583 -1.665 0 0
M  V30 8 H -4.1247 -2.435 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 2 3 5
M  V30 5 1 1 6
M  V30 6 1 1 7
M  V30 7 1 7 8
M  V30 8 10 5 8
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);

    MolDraw2DSVG drawer(300, 300);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::ofstream outs("testHydrogenBonds1.svg");
    outs << drawer.getDrawingText();
    outs.close();
    check_file_hash("testHydrogenBonds1.svg");
  }
  SECTION("from CXSMILES") {
    auto m = "CC1O[H]O=C(C)C1 |H:4.3|"_smiles;
    REQUIRE(m);

    MolDraw2DSVG drawer(300, 300);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::ofstream outs("testHydrogenBonds2.svg");
    outs << drawer.getDrawingText();
    outs.close();
    check_file_hash("testHydrogenBonds2.svg");
  }
}

TEST_CASE("github #3912: cannot draw atom lists from SMARTS", "[query][bug]") {
  SECTION("original") {
    auto m = "C-[N,O]"_smarts;
    REQUIRE(m);
    int panelWidth = -1;
    int panelHeight = -1;
    bool noFreeType = true;
    MolDraw2DSVG drawer(300, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::ofstream outs("testGithub3912.1.svg");
    auto txt = drawer.getDrawingText();
    outs << txt;
    outs.close();
    check_file_hash("testGithub3912.1.svg");
    CHECK(txt.find(">N<") != std::string::npos);
    CHECK(txt.find(">O<") != std::string::npos);
    CHECK(txt.find(">!<") == std::string::npos);
  }
  SECTION("negated") {
    auto m = "C-[N,O]"_smarts;
    REQUIRE(m);
    REQUIRE(m->getAtomWithIdx(1)->hasQuery());
    m->getAtomWithIdx(1)->getQuery()->setNegation(true);
    int panelWidth = -1;
    int panelHeight = -1;
    bool noFreeType = true;
    MolDraw2DSVG drawer(300, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::ofstream outs("testGithub3912.2.svg");
    auto txt = drawer.getDrawingText();
    outs << txt;
    outs.close();
    check_file_hash("testGithub3912.2.svg");
    CHECK(txt.find(">N<") != std::string::npos);
    CHECK(txt.find(">O<") != std::string::npos);
    CHECK(txt.find(">!<") != std::string::npos);
  }
}

TEST_CASE("github #2976: kekulizing reactions when drawing", "[reactions]") {
  SECTION("basics") {
    bool asSmiles = true;
    std::unique_ptr<ChemicalReaction> rxn{
        RxnSmartsToChemicalReaction("c1ccccc1>>c1ncccc1", nullptr, asSmiles)};
    MolDraw2DSVG drawer(450, 200);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    std::ofstream outs("testGithub2976.svg");
    auto txt = drawer.getDrawingText();
    outs << txt;
    outs.close();
    check_file_hash("testGithub2976.svg");
  }
}

TEST_CASE("preserve Reaction coordinates", "[reactions]") {
  SECTION("basics") {
    std::string data = R"RXN($RXN

  Mrv16822    031301211645

  2  2  1
$MOL

  Mrv1682203132116452D          

  3  2  0  0  0  0            999 V2000
   -4.3304    2.5893    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -4.3304    1.7643    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5054    1.7643    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
M  END
$MOL

  Mrv1682203132116452D          

  2  1  0  0  0  0            999 V2000
   -2.1652    2.6339    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1652    1.8089    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
M  END
$MOL

  Mrv1682203132116452D          

  3  2  0  0  0  0            999 V2000
    3.6109    1.9512    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.7859    1.9512    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.7859    2.7762    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
  2  1  1  0  0  0  0
  3  2  1  0  0  0  0
M  END
$MOL

  Mrv1682203132116452D          

  2  1  0  0  0  0            999 V2000
    4.9511    1.9959    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.9511    2.8209    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  2  1  1  0  0  0  0
M  END
$MOL

  Mrv1682203132116452D          

  2  1  0  0  0  0            999 V2000
   -0.3571    2.7232    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4003    3.5471    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
M  END
)RXN";
    std::unique_ptr<ChemicalReaction> rxn{RxnBlockToChemicalReaction(data)};
    MolDraw2DSVG drawer(450, 200);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    std::ofstream outs("testReactionCoords.svg");
    auto txt = drawer.getDrawingText();
    outs << txt;
    outs.close();
    check_file_hash("testReactionCoords.svg");

    // the reaction is drawn with some bonds vertical, make sure they remain
    // vertical
    {
      std::regex regex("class='bond-0.*? d='M (\\d+\\.\\d+).* L (\\d+\\.\\d+)");
      std::smatch bondMatch;
      CHECK(std::regex_search(txt, bondMatch, regex));
      CHECK(bondMatch.size() == 3);  // match both halves of the bond
      CHECK(bondMatch[1].str() == bondMatch[2].str());
    }
    {
      std::regex regex("class='bond-2.*? d='M (\\d+\\.\\d+).* L (\\d+\\.\\d+)");
      std::smatch bondMatch;
      CHECK(std::regex_search(txt, bondMatch, regex));
      CHECK(bondMatch.size() == 3);  // match both halves of the bond
      CHECK(bondMatch[1].str() == bondMatch[2].str());
    }
    {
      std::regex regex("class='bond-4.*? d='M (\\d+\\.\\d+).* L (\\d+\\.\\d+)");
      std::smatch bondMatch;
      CHECK(std::regex_search(txt, bondMatch, regex));
      CHECK(bondMatch.size() == 3);  // match both halves of the bond
      CHECK(bondMatch[1].str() == bondMatch[2].str());
    }
  }
}
TEST_CASE("support annotation colors", "[drawing]") {
  SECTION("basics") {
    auto m = "CCCO"_smiles;
    REQUIRE(m);
    int panelWidth = -1;
    int panelHeight = -1;
    bool noFreeType = true;
    MolDraw2DSVG drawer(300, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawOptions().annotationColour = DrawColour{0, 0, 1, 1};
    drawer.drawOptions().addAtomIndices = true;
    m->setProp("molNote", "foo");
    drawer.drawMolecule(*m, "blue annotations");
    drawer.finishDrawing();
    std::ofstream outs("testAnnotationColors.svg");
    auto txt = drawer.getDrawingText();
    outs << txt;
    outs.close();
    check_file_hash("testAnnotationColors.svg");
    CHECK(txt.find("fill:#0000FF' >f<") != std::string::npos);
    // the general annotation colour change does not affect atom annotations:
    CHECK(txt.find("fill:#000000' >2<") != std::string::npos);
  }
}

TEST_CASE("Github #4238: prepareMolForDrawing and wavy bonds") {
  {
    auto mol = "CC=CC"_smiles;
    REQUIRE(mol);
    mol->getBondWithIdx(1)->setStereoAtoms(0, 3);
    mol->getBondWithIdx(1)->setStereo(Bond::BondStereo::STEREOANY);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = false;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    CHECK(mol->getBondWithIdx(0)->getBondDir() == Bond::BondDir::NONE);
    CHECK(mol->getBondWithIdx(1)->getStereo() == Bond::BondStereo::STEREOANY);

    RWMol mol2(*mol);
    wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(mol2, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    CHECK(mol2.getBondWithIdx(0)->getBondDir() == Bond::BondDir::UNKNOWN);
    CHECK(mol2.getBondWithIdx(1)->getStereo() == Bond::BondStereo::STEREONONE);

    MOL_PTR_VECT ms{mol.get(), &mol2};
    {
      MolDraw2DSVG drawer(500, 200, 250, 200);
      // drawer.drawOptions().prepareMolsBeforeDrawing = false;
      std::vector<std::string> legends = {"before", "after"};
      drawer.drawMolecules(ms, &legends);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub4238_1.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4238_1.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(500, 200, 250, 200);
      std::vector<std::string> legends = {"before", "after"};
      drawer.drawMolecules(ms, &legends);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub4238_1.png");
      check_file_hash("testGithub4238_1.png");
    }
#endif
  }
}

TEST_CASE("Github #4323: support providing RGBA colors") {
  auto mol = "CCCO"_smiles;
  REQUIRE(mol);
#ifdef RDK_BUILD_FREETYPE_SUPPORT
  SECTION("with alpha") {
    MolDraw2DSVG drawer(200, 150);
    drawer.drawOptions().legendColour = DrawColour(1, 0, 1, 0.3);
    drawer.drawOptions().backgroundColour = DrawColour(0.5, 0.5, 0.5, 0.3);
    drawer.drawMolecule(*mol, "partially transparent legend/background");
    drawer.finishDrawing();

    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4323_1.svg");
    outs << text;
    outs.flush();
    // background
    CHECK(text.find("fill:#7F7F7F4C;") != std::string::npos);
    CHECK(text.find("fill:#7F7F7F;") == std::string::npos);
    // legend
    CHECK(text.find("fill='#FF00FF4C'") != std::string::npos);
    CHECK(text.find("fill='#FF00FF'") == std::string::npos);
    check_file_hash("testGithub4323_1.svg");
  }
  SECTION("without alpha") {
    MolDraw2DSVG drawer(200, 150);
    drawer.drawOptions().legendColour = DrawColour(1, 0, 1);
    drawer.drawOptions().backgroundColour = DrawColour(0.5, 0.5, 0.5);
    drawer.drawMolecule(*mol, "no transparency");
    drawer.finishDrawing();

    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4323_2.svg");
    outs << text;
    outs.flush();
    // background
    CHECK(text.find("fill:#7F7F7F4C;") == std::string::npos);
    CHECK(text.find("fill:#7F7F7F;") != std::string::npos);
    // legend
    CHECK(text.find("fill='#FF00FF4C'") == std::string::npos);
    CHECK(text.find("fill='#FF00FF'") != std::string::npos);
    check_file_hash("testGithub4323_2.svg");
  }
#endif
  SECTION("no FT with alpha") {
    MolDraw2DSVG drawer(200, 150, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendColour = DrawColour(1, 0, 1, 0.3);
    drawer.drawOptions().backgroundColour = DrawColour(0.5, 0.5, 0.5, 0.3);
    drawer.drawMolecule(*mol, "partially transparent legend/background");
    drawer.finishDrawing();

    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4323_3.svg");
    outs << text;
    outs.flush();
    // background
    CHECK(text.find("fill:#7F7F7F4C;") != std::string::npos);
    CHECK(text.find("fill:#7F7F7F;") == std::string::npos);
    // legend
    CHECK(text.find("fill:#FF00FF4C'") != std::string::npos);
    CHECK(text.find("fill:#FF00FF'") == std::string::npos);
    check_file_hash("testGithub4323_3.svg");
  }
  SECTION("no FT without alpha") {
    MolDraw2DSVG drawer(200, 150, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendColour = DrawColour(1, 0, 1);
    drawer.drawOptions().backgroundColour = DrawColour(0.5, 0.5, 0.5);
    drawer.drawMolecule(*mol, "no transparency");
    drawer.finishDrawing();

    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4323_4.svg");
    outs << text;
    outs.flush();
    // background
    CHECK(text.find("fill:#7F7F7F4C;") == std::string::npos);
    CHECK(text.find("fill:#7F7F7F;") != std::string::npos);
    // legend
    CHECK(text.find("fill:#FF00FF4C'") == std::string::npos);
    CHECK(text.find("fill:#FF00FF'") != std::string::npos);
    check_file_hash("testGithub4323_4.svg");
  }
#ifdef RDK_BUILD_CAIRO_SUPPORT
#ifdef RDK_BUILD_FREETYPE_SUPPORT
  SECTION("Cairo with alpha") {
    MolDraw2DCairo drawer(200, 150);
    drawer.drawOptions().legendColour = DrawColour(1, 0, 1, 0.3);
    drawer.drawOptions().backgroundColour = DrawColour(0.5, 0.5, 0.5, 0.3);
    drawer.drawMolecule(*mol, "partially transparent legend/background");
    drawer.finishDrawing();
    drawer.writeDrawingText("testGithub4323_1.png");
    check_file_hash("testGithub4323_1.png");
  }
#endif
  SECTION("No FT Cairo with alpha") {
    MolDraw2DCairo drawer(200, 150, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendColour = DrawColour(1, 0, 1, 0.3);
    drawer.drawOptions().backgroundColour = DrawColour(0.5, 0.5, 0.5, 0.3);
    drawer.drawMolecule(*mol, "partially transparent legend/background");
    drawer.finishDrawing();
    drawer.writeDrawingText("testGithub4323_3.png");
    check_file_hash("testGithub4323_3.png");
  }
#endif
}

TEST_CASE(
    "Github #4508: SubstanceGroup labels sometimes overlap with atoms in image "
    "generation") {
  SECTION("Basics") {
    auto mol = R"CTAB(
  Mrv2114 09132120172D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 8 8 1 0 1
M  V30 BEGIN ATOM
M  V30 1 C -0.5878 0.8085 0 0
M  V30 2 C -1.9434 0.078 0 0
M  V30 3 C -1.9884 -1.4614 0 0
M  V30 4 C -0.6778 -2.2702 0 0
M  V30 5 C 0.6778 -1.5394 0 0
M  V30 6 C 0.7228 -0.0001 0 0
M  V30 7 N -0.5428 2.3478 0 0
M  V30 8 O 1.9884 -2.3479 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 1 2
M  V30 2 1 2 3
M  V30 3 2 3 4
M  V30 4 1 4 5
M  V30 5 2 5 6
M  V30 6 1 6 1
M  V30 7 1 1 7
M  V30 8 1 5 8
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 7) FIELDNAME=UV FIELDINFO=nm -
M  V30 FIELDDISP="    0.0000    0.0000    DRU   ALL  0       0" -
M  V30 MRV_FIELDDISP=0 FIELDDATA=340
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
    REQUIRE(mol);

    {
      MolDraw2DSVG drawer(300, 250);
      drawer.drawMolecule(*mol, "data label with DRU");
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub4508_1.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4508_1.svg");
    }

    // remove the sgroup-atom atom... the SGroup will not be drawn
    auto &sgs = getSubstanceGroups(*mol);
    CHECK(sgs.size() == 1);
    sgs[0].setAtoms(std::vector<unsigned int>());
    {
      MolDraw2DSVG drawer(300, 250);
      drawer.drawMolecule(*mol, "no data label drawn");
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub4508_1b.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4508_1b.svg");
    }
  }
  SECTION("Absolute") {
    auto mol = R"CTAB(
  Mrv2114 09132120172D

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 8 8 1 0 1
M  V30 BEGIN ATOM
M  V30 1 C -0.5878 0.8085 0 0
M  V30 2 C -1.9434 0.078 0 0
M  V30 3 C -1.9884 -1.4614 0 0
M  V30 4 C -0.6778 -2.2702 0 0
M  V30 5 C 0.6778 -1.5394 0 0
M  V30 6 C 0.7228 -0.0001 0 0
M  V30 7 N -0.5428 2.3478 0 0
M  V30 8 O 1.9884 -2.3479 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 1 2
M  V30 2 1 2 3
M  V30 3 2 3 4
M  V30 4 1 4 5
M  V30 5 2 5 6
M  V30 6 1 6 1
M  V30 7 1 1 7
M  V30 8 1 5 8
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 7) FIELDNAME=UV FIELDINFO=nm -
M  V30 FIELDDISP="    0.0000    0.0000    DAU   ALL  0       0" -
M  V30 MRV_FIELDDISP=0 FIELDDATA=340
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
    REQUIRE(mol);

    {
      MolDraw2DSVG drawer(300, 250);
      drawer.drawMolecule(*mol, "data label with DAU\n(expect odd placement)");
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub4508_2.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4508_2.svg");
    }

    // remove the sgroup-atom atom... the SGroup will still be drawn
    auto &sgs = getSubstanceGroups(*mol);
    CHECK(sgs.size() == 1);
    sgs[0].setAtoms(std::vector<unsigned int>());
    {
      MolDraw2DSVG drawer(300, 250);
      drawer.drawMolecule(*mol,
                          "DAU, no associated atom\n(expect odd placement)");
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("testGithub4508_2b.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4508_2b.svg");
    }
  }
}

TEST_CASE("Github #4538 drawMolecules crash") {
  auto m = "CCc1ccccc1"_smiles;
  REQUIRE(m);
  RDDepict::compute2DCoords(*m);
  ROMol m1(*m);
  ROMol m2(*m);
  std::vector<ROMol *> mols{&m1, &m2};
  SECTION("basics") {
    MolDraw2DSVG drawer(500, 200, 250, 200);
    drawer.drawOptions().prepareMolsBeforeDrawing = false;
    drawer.drawMolecules(mols);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testGithub4538.svg");
    outs << text;
    outs.flush();
    check_file_hash("testGithub4538.svg");
  }
}

TEST_CASE("dark mode mol drawing") {
  SECTION("Basics") {
    auto m =
        "CS(=O)(=O)COC(=N)c1cc(Cl)cnc1[NH3+] |SgD:7:note:some extra text:=:::|"_smiles;
    REQUIRE(m);
    MolDraw2DSVG drawer(350, 300);
    setDarkMode(drawer);
    drawer.drawMolecule(*m, "dark mode!");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testDarkMode.1.svg");
    outs << text;
    outs.flush();
    check_file_hash("testDarkMode.1.svg");
  }
}
TEST_CASE("monochrome mol drawing") {
  SECTION("Basics") {
    auto m =
        "CS(=O)(=O)COC(=N)c1cc(Cl)cnc1[NH3+] |SgD:7:note:some extra text:=:::|"_smiles;
    REQUIRE(m);
    MolDraw2DSVG drawer(350, 300);
    setMonochromeMode(drawer, DrawColour{0.1, 0.1, 0.6},
                      DrawColour{0.75, 0.75, 0.75});
    drawer.drawMolecule(*m, "monochrome");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testMonochrome.1.svg");
    outs << text;
    outs.flush();
    check_file_hash("testMonochrome.1.svg");
  }
  SECTION("Basics inverted") {
    auto m =
        "CS(=O)(=O)COC(=N)c1cc(Cl)cnc1[NH3+] |SgD:7:note:some extra text:=:::|"_smiles;
    REQUIRE(m);
    MolDraw2DSVG drawer(350, 300);
    setMonochromeMode(drawer, DrawColour{0.75, 0.75, 0.75},
                      DrawColour{0.1, 0.1, 0.6});
    drawer.drawMolecule(*m, "monochrome");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testMonochrome.2.svg");
    outs << text;
    outs.flush();
    check_file_hash("testMonochrome.2.svg");
  }
}
TEST_CASE("other palettes") {
  auto m =
      "CS(=O)(=O)COC(=N)c1c(I)c(Cl)c(Br)nc1[NH2+]CP(=O) |SgD:7:note:some extra text:=:::|"_smiles;
  REQUIRE(m);
  SECTION("Avalon") {
    MolDraw2DSVG drawer(350, 300);
    assignAvalonPalette(drawer.drawOptions().atomColourPalette);
    drawer.drawMolecule(*m, "Avalon");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAvalon.1.svg");
    outs << text;
    outs.flush();
    check_file_hash("testAvalon.1.svg");
  }
  SECTION("CDK") {
    MolDraw2DSVG drawer(350, 300);
    assignCDKPalette(drawer.drawOptions().atomColourPalette);
    drawer.drawMolecule(*m, "CDK");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testCDK.1.svg");
    outs << text;
    outs.flush();
    check_file_hash("testCDK.1.svg");
  }
}

TEST_CASE("SDD record parsing") {
  auto mol = R"CTAB(
  Mrv2008 11122110292D

  6  6  0  0  0  0            999 V2000
    9.3527    2.5661    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.6382    2.1536    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.6382    1.3286    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.3527    0.9161    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.0671    1.3286    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.0671    2.1536    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  2  0  0  0  0
  3  4  1  0  0  0  0
  4  5  2  0  0  0  0
  5  6  1  0  0  0  0
  1  6  2  0  0  0  0
M  STY  1   1 DAT
M  SLB  1   1   1
M  SAL   1  1   1
M  SDT   1 NAME
M  SDD   1 -2345.1234-2345.1234    DR    ALL  1       0
M  SED   1 Hello World
M  END
)CTAB"_ctab;
  // SDD record has format
  // M  SDD sss xxxxx.xxxxyyyyy.yyyy eeefgh i jjjkkk ll m noo
  MolDraw2DSVG drawer(350, 300, -1, -1, 1);
  drawer.drawMolecule(*mol);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::string name("Hello World");
  for (auto &c : name) {
    std::stringstream ss;
    ss << " >" << c << "</text>";
    auto pos = text.find(ss.str());
    CHECK(pos != std::string::npos);
  }
}

TEST_CASE("Github #4519 bad placement of datafield labels") {
  auto mol1 = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 5 4 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C 0.000000 0.000000 0.000000 0
M  V30 2 C 1.299038 0.750000 0.000000 0
M  V30 3 C 2.598076 -0.000000 0.000000 0
M  V30 4 C 1.299038 2.250000 0.000000 0
M  V30 5 C 2.598076 3.000000 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 2 4
M  V30 4 2 4 5
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(5 2 4 5 3 1) FIELDNAME="Lambda Max" FIELDINFO=nm -
M  V30 FIELDDATA="2222"
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
  REQUIRE(mol1);

  auto mol2 = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 8 8 1 0 0
M  V30 BEGIN ATOM
M  V30 1 N 3.000000 0.000000 0.000000 0
M  V30 2 C 1.500000 0.000000 0.000000 0
M  V30 3 C 0.750000 -1.299038 0.000000 0
M  V30 4 C -0.750000 -1.299038 0.000000 0
M  V30 5 C -1.500000 0.000000 0.000000 0
M  V30 6 C -0.750000 1.299038 0.000000 0
M  V30 7 O -1.500000 2.598076 0.000000 0
M  V30 8 C 0.750000 1.299038 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 1 6 7
M  V30 7 2 6 8
M  V30 8 1 8 2
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 1) FIELDNAME=UV FIELDINFO=nm -
M  V30 FIELDDISP="    0.0000    0.0000    DR    ALL  0       0" -
M  V30 FIELDDATA="340"
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
  REQUIRE(mol2);

  auto mol3 = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 4 3 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C -0.750000 -1.299038 0.000000 0
M  V30 2 C 0.000000 0.000000 0.000000 0
M  V30 3 C 1.500000 0.000000 0.000000 0
M  V30 4 C 2.250000 1.299038 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(1 3) FIELDNAME=Stereo -
M  V30 FIELDDATA="Cis"
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
  REQUIRE(mol3);

  std::vector<std::string> legends = {
      "datafield label bad placement1", "datafield label bad placement2",
      "datafield label bad placement3"};  //  std::vector<std::string> legends =
                                          //  {"datafield label bad
                                          //  placement2"};
  {
    MolDraw2DSVG drawer(300, 250);
    drawer.drawMolecule(*mol1, legends[0]);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4519_1.svg");
    outs << text;
    outs.flush();
    check_file_hash("testGithub4519_1.svg");
  }
  {
    MolDraw2DSVG drawer(300, 250);
    drawer.drawMolecule(*mol2, legends[1]);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4519_2.svg");
    outs << text;
    outs.flush();
    check_file_hash("testGithub4519_2.svg");
  }
  {
    MolDraw2DSVG drawer(300, 250);
    drawer.drawMolecule(*mol3, legends[2]);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4519_3.svg");
    outs << text;
    outs.flush();
    check_file_hash("testGithub4519_3.svg");
  }

  {
    std::vector<ROMol *> mols;
    mols.push_back(mol1.get());
    mols.push_back(mol2.get());
    mols.push_back(mol3.get());
    MolDraw2DSVG drawer(900, 250, 300, 250);
    drawer.drawMolecules(mols, &legends);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("testGithub4519_4.svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash("testGithub4519_4.svg");
  }
}

TEST_CASE("changing baseFontSize") {
  RDDepict::preferCoordGen = false;
  auto mol1 =
      "CC(C)C[C@H](NC(=O)[C@H](CCCCN)NC(=O)[C@H](CS)NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](CCCCN)NC(=O)[C@H](CC(C)C)NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](CS)NC(=O)[C@H](CCCCN)NC(=O)[C@H](C)NC(=O)[C@@H](NC(=O)[C@H](CS)NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](CCCCN)NC(=O)CNC(=O)[C@H](C)NC(=O)[C@H](CCCCN)NC(=O)[C@H](C)N)[C@@H](C)O)C(=O)O"_smiles;
  REQUIRE(mol1);
  MolDraw2DUtils::prepareMolForDrawing(*mol1);
  auto mol2 = "C[C@H](N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](C)C(=O)NCC(=O)O"_smiles;
  REQUIRE(mol2);
  MolDraw2DUtils::prepareMolForDrawing(*mol2);
  SECTION("basics-large") {
    MolDraw2DSVG drawer(350, 300, -1, -1, 1);
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    CHECK_THAT(drawer.fontSize(), Catch::Matchers::WithinAbs(6.0, 0.2));
    auto text = drawer.getDrawingText();
    std::ofstream outs("testBaseFontSize.1a.svg");
    outs << text;
    outs.flush();
    check_file_hash("testBaseFontSize.1a.svg");
  }
  SECTION("increase size - large") {
    // here we change the base font size, but it doesn't matter since the
    // structure is big enough we end up stuck with the minimum font size.
    MolDraw2DSVG drawer(350, 300, -1, -1, 1);
    drawer.drawOptions().baseFontSize = 0.9;
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    CHECK_THAT(drawer.fontSize(), Catch::Matchers::WithinAbs(6.0, 0.2));
    auto text = drawer.getDrawingText();
    std::ofstream outs("testBaseFontSize.1b.svg");
    outs << text;
    outs.flush();
    check_file_hash("testBaseFontSize.1b.svg");
  }
  SECTION("basics-small") {
    MolDraw2DSVG drawer(350, 300, -1, -1, 1);
    drawer.drawMolecule(*mol2);
    drawer.finishDrawing();
    CHECK_THAT(drawer.fontSize(), Catch::Matchers::WithinAbs(14.0, 0.2));

    auto text = drawer.getDrawingText();
    std::ofstream outs("testBaseFontSize.2a.svg");
    outs << text;
    outs.flush();
    check_file_hash("testBaseFontSize.2a.svg");
  }
  SECTION("increase size - smaller") {
    MolDraw2DSVG drawer(350, 300, -1, -1, 1);
    drawer.drawOptions().baseFontSize = 0.9;
    drawer.drawMolecule(*mol2);
    drawer.finishDrawing();
    CHECK_THAT(drawer.fontSize(), Catch::Matchers::WithinAbs(20.25, 0.2));

    auto text = drawer.getDrawingText();
    std::ofstream outs("testBaseFontSize.2b.svg");
    outs << text;
    outs.flush();
    check_file_hash("testBaseFontSize.2b.svg");
  }
}

TEST_CASE("flexicanvas: set canvas size automatically") {
  // note that these examples use Freetype if it's available.
  auto mol1 = "CCN(CC)CCn1nc2c3ccccc3sc3c(CNS(C)(=O)=O)ccc1c32"_smiles;
  REQUIRE(mol1);
  MolDraw2DUtils::prepareMolForDrawing(*mol1);

  auto mol2 = R"CTAB(
  Mrv2108 11192104292D

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 5 5 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -5.2 -1.4 0 0
M  V30 2 O -5.2 -2.8 0 0
M  V30 3 C -3.7 -1.4 0 0
M  V30 4 C -3.7 -2.8 0 0 CFG=1
M  V30 5 N -2.5994 -3.9839 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 1 3
M  V30 3 1 2 4
M  V30 4 1 3 4
M  V30 5 1 4 5 CFG=1
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
  REQUIRE(mol2);
  MolDraw2DUtils::prepareMolForDrawing(*mol2);
  SECTION("fixed canvas") {
    MolDraw2DSVG drawer(308, 223, -1, -1);
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.1a.svg");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.1a.svg");
  }
  SECTION("flexicanvas1") {
    MolDraw2DSVG drawer(-1, -1, -1, -1);
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.1b.svg");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.1b.svg");
  }
  SECTION("flexicanvas1") {
    MolDraw2DSVG drawer(-1, -1, -1, -1);
    drawer.drawOptions().scalingFactor = 30;
    drawer.drawOptions().baseFontSize = 0.6;
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.1c.svg");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.1c.svg");
  }
  SECTION("flexicanvas1") {
    MolDraw2DSVG drawer(-1, -1, -1, -1);
    drawer.drawOptions().scalingFactor = 30;
    drawer.drawOptions().fixedFontSize = 32;
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    CHECK(drawer.fontSize() == Catch::Approx(32).margin(0.1));
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.1d.svg");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.1d.svg");
  }
  SECTION("square") {
    MolDraw2DSVG drawer(-1, -1, -1, -1);
    drawer.drawOptions().baseFontSize = 0.8;
    drawer.drawMolecule(*mol2);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.2.svg");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.2.svg");
  }
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("square PNG no freetype") {
    MolDraw2DCairo drawer(-1, -1, -1, -1, true);
    drawer.drawOptions().baseFontSize = 0.8;
    drawer.drawMolecule(*mol2);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.2a.png");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.2a.png");
  }
  SECTION("square PNG with freetype") {
    MolDraw2DCairo drawer(-1, -1, -1, -1, false);
    drawer.drawOptions().baseFontSize = 0.8;
    drawer.drawMolecule(*mol2);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.2b.png");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.2b.png");
  }
#endif
  // semiflexicanvas - with freetype
  SECTION("semiflexicanvas1") {
    MolDraw2DSVG drawer(308, -1, -1, -1, false);
    drawer.drawOptions().scalingFactor = 30;
    drawer.drawOptions().baseFontSize = 0.6;
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testSemiFlexiCanvas.1a.svg");
    outs << text;
    outs.flush();
    check_file_hash("testSemiFlexiCanvas.1a.svg");
  }
  SECTION("semiflexicanvas2") {
    MolDraw2DSVG drawer(-1, 223, -1, -1, false);
    drawer.drawOptions().scalingFactor = 30;
    drawer.drawOptions().baseFontSize = 0.6;
    drawer.drawMolecule(*mol1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testSemiFlexiCanvas.1b.svg");
    outs << text;
    outs.flush();
    check_file_hash("testSemiFlexiCanvas.1b.svg");
  }
  SECTION("semiflexicanvas3") {
    auto mol3 = "ON"_smiles;
    REQUIRE(mol3);
    MolDraw2DSVG drawer(-1, 150, -1, -1, false);
    drawer.drawOptions().scalingFactor = 30;
    drawer.drawOptions().baseFontSize = 0.6;
    drawer.drawMolecule(*mol3);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testSemiFlexiCanvas.1c.svg");
    outs << text;
    outs.flush();
    check_file_hash("testSemiFlexiCanvas.1c.svg");
  }
  SECTION("reaction") {
    std::unique_ptr<ChemicalReaction> rxn(RxnSmartsToChemicalReaction(
        "[N:1]-[C:2]-[C:3](=[O:4])-[O:5].[N:6]-[C:7]-[C:8](=[O:9])-[O:10]>>[N:"
        "1]1-[C:2]-[C:3](=[O:4])-[N:6]-[C:7]-[C:8]-1=[O:9].[O:5]=[O:10]"));
    MolDraw2DSVG drawer(-1, -1, -1, -1, true);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testFlexiCanvas.3.svg");
    outs << text;
    outs.flush();
    check_file_hash("testFlexiCanvas.3.svg");
  }
  SECTION("data labels") {
    auto mol1 = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 5 4 1 0 0
M  V30 BEGIN ATOM
M  V30 1 C 0.000000 0.000000 0.000000 0
M  V30 2 C 1.299038 0.750000 0.000000 0
M  V30 3 C 2.598076 -0.000000 0.000000 0
M  V30 4 C 1.299038 2.250000 0.000000 0
M  V30 5 C 2.598076 3.000000 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 2 4
M  V30 4 2 4 5
M  V30 END BOND
M  V30 BEGIN SGROUP
M  V30 1 DAT 0 ATOMS=(5 2 4 5 3 1) FIELDNAME="Lambda Max" FIELDINFO=nm -
M  V30 FIELDDATA="2222"
M  V30 END SGROUP
M  V30 END CTAB
M  END)CTAB"_ctab;
    REQUIRE(mol1);
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawMolecule(*mol1);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.4a.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.4a.svg");
    }
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawMolecule(*mol1, "legendary");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.4b.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.4b.svg");
    }
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawMolecule(*mol1, "doubly\nlegendary");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.4c.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.4c.svg");
    }
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawOptions().legendFraction = 0.25;
      drawer.drawOptions().legendFontSize = 32;
      drawer.drawMolecule(*mol1, "Hugely\nLegendary");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.4d.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.4d.svg");
    }
  }
  SECTION("including legends") {
    // add an atomNote so that we can compare font sizes
    mol1->getAtomWithIdx(0)->setProp(common_properties::atomNote, "n1");
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.5a.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.5a.svg");
    }
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawMolecule(*mol1, "legend\nwith two lines");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.5b.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.5b.svg");
    }
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawOptions().scalingFactor = 45;
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.5c.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.5c.svg");
    }
    {
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawOptions().scalingFactor = 10;
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.5d.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.5d.svg");
    }
  }

  SECTION("partially flexicanvas (height) + legends") {
    // add an atomNote so that we can compare font sizes
    mol1->getAtomWithIdx(0)->setProp(common_properties::atomNote, "n1");
    {
      MolDraw2DSVG drawer(-1, 200);
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.6a.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.6a.svg");
    }
    {
      MolDraw2DSVG drawer(-1, 200);
      drawer.drawMolecule(*mol1, "legend\nwith two lines");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.6b.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.6b.svg");
    }
    {
      MolDraw2DSVG drawer(-1, 200);
      drawer.drawOptions().scalingFactor = 45;
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.6c.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.6c.svg");
    }
    {
      MolDraw2DSVG drawer(-1, 200);
      drawer.drawOptions().scalingFactor = 10;
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.6d.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.6d.svg");
    }
  }

  SECTION("partially flexicanvas (width) + legends") {
    // add an atomNote so that we can compare font sizes
    mol1->getAtomWithIdx(0)->setProp(common_properties::atomNote, "n1");
    {
      MolDraw2DSVG drawer(300, -1);
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.7a.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.7a.svg");
    }
    {
      MolDraw2DSVG drawer(300, -1);
      drawer.drawMolecule(*mol1, "legend\nwith two lines");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.7b.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.7b.svg");
    }
    {
      MolDraw2DSVG drawer(300, -1);
      drawer.drawOptions().scalingFactor = 45;
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.7c.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.7c.svg");
    }
    {
      MolDraw2DSVG drawer(300, -1);
      drawer.drawOptions().scalingFactor = 10;
      drawer.drawMolecule(*mol1, "legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testFlexiCanvas.7d.svg");
      outs << text;
      outs.flush();
      check_file_hash("testFlexiCanvas.7d.svg");
    }
  }
}

TEST_CASE("Github #4764") {
  SECTION("basics") {
    auto mol = "c1ccccc1-C1CCCCC1"_smiles;
    REQUIRE(mol);
    std::vector<int> highlights{6, 7, 8, 9, 10, 11};
    {
      MolDraw2DSVG drawer(200, 150);
      drawer.drawMolecule(*mol, "highlight", &highlights);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testGithub4764.sz1.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4764.sz1.svg");
    }
    {
      MolDraw2DSVG drawer(400, 350);
      drawer.drawMolecule(*mol, "highlight", &highlights);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testGithub4764.sz2.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4764.sz2.svg");
    }
    {
      MolDraw2DSVG drawer(800, 700);
      drawer.drawMolecule(*mol, "highlight", &highlights);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testGithub4764.sz3.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub4764.sz3.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    {
      MolDraw2DCairo drawer(200, 150);
      drawer.drawMolecule(*mol, "highlight", &highlights);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub4764.sz1.png");
      check_file_hash("testGithub4764.sz1.png");
    }
    {
      MolDraw2DCairo drawer(400, 350);
      drawer.drawMolecule(*mol, "highlight", &highlights);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub4764.sz2.png");
      check_file_hash("testGithub4764.sz2.png");
    }
    {
      MolDraw2DCairo drawer(800, 700);
      drawer.drawMolecule(*mol, "highlight", &highlights);
      drawer.finishDrawing();
      drawer.writeDrawingText("testGithub4764.sz3.png");
      check_file_hash("testGithub4764.sz3.png");
    }
#endif
    // check_file_hash("testGithub4538.svg");
  }
}

TEST_CASE("drawArc starting from wrong angle") {
  SECTION("basics") {
    auto mol = R"CTAB(
     RDKit          2D

  9  9  0  0  0  0  0  0  0  0999 V2000
   -1.2135   -0.7027    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0000   -1.5844    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    1.2135   -0.7027    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7500    0.7238    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7500    0.7238    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6317    1.9374    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6401   -1.1663    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    2.6401   -1.1663    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    1.6317    1.9374    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  2  0
  3  4  1  0
  4  5  1  0
  5  6  1  0
  5  1  2  0
  1  7  1  0
  3  8  1  0
  4  9  1  0
M  END)CTAB"_ctab;
    REQUIRE(mol);
    {
      MolDraw2DSVG drawer(400, 350);
      drawer.drawOptions().noAtomLabels = true;
      drawer.drawMolecule(*mol, "drawArc");
      drawer.setFillPolys(false);
      drawer.setColour({1, 0, 0});
      drawer.drawArc(mol->getConformer().getAtomPos(3), 0.3, -72, 54);
      drawer.drawArc(mol->getConformer().getAtomPos(0), 0.3, -162, -36);
      drawer.drawArc(mol->getConformer().getAtomPos(4), 0.3, 126, 252);
      drawer.drawArc(mol->getConformer().getAtomPos(2), 0.3, -18, 108);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testDrawArc1.svg");
      outs << text;
      outs.flush();
      check_file_hash("testDrawArc1.svg");
    }
  }
}

TEST_CASE("wedged bonds to metals drawn in the wrong direction") {
  SECTION("basics") {
    auto m = R"CTAB(
  Mrv2108 01092205442D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 5 4 0 0 0
M  V30 BEGIN ATOM
M  V30 1 F 10.6667 -0.75 0 0
M  V30 2 Pt 10.6667 -2.29 0 0 CFG=1
M  V30 3 Cl 12.2067 -2.29 0 0
M  V30 4 C 10.6667 -3.83 0 0
M  V30 5 O 9.1267 -2.29 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 2 4 CFG=1
M  V30 4 1 2 5 CFG=3
M  V30 END BOND
M  V30 END CTAB
M  END)CTAB"_ctab;
    m->getBondWithIdx(2)->setBondDir(Bond::BondDir::BEGINWEDGE);
    m->getBondWithIdx(3)->setBondDir(Bond::BondDir::BEGINDASH);
    MolDraw2DSVG drawer(250, 200);
    assignBWPalette(drawer.drawOptions().atomColourPalette);
    drawer.drawMolecule(*m, "check wedges");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testMetalWedges.svg");
    outs << text;
    outs.flush();
    check_file_hash("testMetalWedges.svg");
  }
}

TEST_CASE("vary proportion of panel for legend", "[drawing]") {
  SECTION("basics") {
    auto m1 = "C1N[C@@H]2OCC12"_smiles;
    REQUIRE(m1);
    // These look a bit pants with NO_FREETYPE=true, but much better with
    // Freetype.
    {
      // default legend
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, "default legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testVariableLegend_1.svg");
      outs << text;
      outs.flush();
      CHECK(text.find("<text x='34.5' y='190.0' class='legend' "
                      "style='font-size:16px;") != std::string::npos);
      check_file_hash("testVariableLegend_1.svg");
    }
    {
      // 1/4 of panel
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      drawer.drawOptions().legendFraction = 0.25;
      drawer.drawOptions().legendFontSize = 32;
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, "massive legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testVariableLegend_2.svg");
      outs << text;
      outs.flush();
      CHECK(text.find("<text x='2.8' y='190.0' class='legend' "
                      "style='font-size:31px;") != std::string::npos);
      check_file_hash("testVariableLegend_2.svg");
    }
    {
      // tiny
      MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
      drawer.drawOptions().legendFraction = 0.05;
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, "small legend");
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testVariableLegend_3.svg");
      outs << text;
      outs.flush();
      CHECK(text.find("<text x='72.4' y='190.0' class='legend' "
                      "style='font-size:11px;") != std::string::npos);
      check_file_hash("testVariableLegend_3.svg");
    }
  }
}

TEST_CASE("legend position Top Left Right and vertical text", "[drawing]") {
  auto m1 = "CCO"_smiles;
  REQUIRE(m1);
  const std::string legend("Ethanol");
  auto get_legend_xy = [](const std::string &text, double &x, double &y) {
    std::smatch match;
    std::regex textRgx(
        "<text x='(-?[0-9]+\\.?[0-9]*)' y='(-?[0-9]+\\.?[0-9]*)' class='legend'");
    if (std::regex_search(text, match, textRgx) && match.size() == 3) {
      x = std::stod(match[1].str());
      y = std::stod(match[2].str());
      return true;
    }
    std::regex pathRgx(
        "class='legend' d='M (-?[0-9]+\\.?[0-9]*) "
        "(-?[0-9]+\\.?[0-9]*)");
    if (std::regex_search(text, match, pathRgx) && match.size() == 3) {
      x = std::stod(match[1].str());
      y = std::stod(match[2].str());
      return true;
    }
    return false;
  };
  auto get_all_legend_xy = [](const std::string &text) {
    std::vector<std::pair<double, double>> coords;
    std::regex textRgx(
        "<text x='(-?[0-9]+\\.?[0-9]*)' y='(-?[0-9]+\\.?[0-9]*)' class='legend'");
    for (auto it = std::sregex_iterator(text.begin(), text.end(), textRgx);
         it != std::sregex_iterator(); ++it) {
      coords.emplace_back(std::stod((*it)[1].str()), std::stod((*it)[2].str()));
    }
    if (!coords.empty()) {
      return coords;
    }
    std::regex pathRgx(
        "class='legend' d='M (-?[0-9]+\\.?[0-9]*) "
        "(-?[0-9]+\\.?[0-9]*)");
    for (auto it = std::sregex_iterator(text.begin(), text.end(), pathRgx);
         it != std::sregex_iterator(); ++it) {
      coords.emplace_back(std::stod((*it)[1].str()), std::stod((*it)[2].str()));
    }
    return coords;
  };
  double top_x = 0.0, top_y = 0.0;
  double bottom_x = 0.0, bottom_y = 0.0;
  double left_x = 0.0, left_y = 0.0;
  double right_x = 0.0, right_y = 0.0;
  SECTION("Top") {
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendPosition = MolDrawOptions::LegendPosition::Top;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, legend);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
    CHECK(get_legend_xy(text, top_x, top_y));
    // Legend should sit in the upper part of the canvas (SVG y grows down).
    CHECK(top_y < 50.0);
    std::ofstream outs("testLegendPosition_top.svg");
    outs << text;
    outs.flush();
  }
  SECTION("Left with vertical text") {
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendPosition = MolDrawOptions::LegendPosition::Left;
    drawer.drawOptions().legendVerticalText = true;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, legend);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
    auto coords = get_all_legend_xy(text);
    REQUIRE(coords.size() > 1);
    for (size_t i = 1; i < coords.size(); ++i) {
      CHECK(coords[i].second > coords[i - 1].second);
    }
    std::ofstream outs("testLegendPosition_left_vertical.svg");
    outs << text;
    outs.flush();
  }
  SECTION("Left horizontal") {
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendPosition = MolDrawOptions::LegendPosition::Left;
    drawer.drawOptions().legendVerticalText = false;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, legend);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
    CHECK(get_legend_xy(text, left_x, left_y));
    CHECK(left_x < 80.0);
    std::ofstream outs("testLegendPosition_left_horizontal.svg");
    outs << text;
    outs.flush();
  }
  SECTION("Right horizontal") {
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendPosition = MolDrawOptions::LegendPosition::Right;
    drawer.drawOptions().legendVerticalText = false;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, legend);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
    CHECK(get_legend_xy(text, right_x, right_y));
    CHECK(right_x > 100.0);
    std::ofstream outs("testLegendPosition_right_horizontal.svg");
    outs << text;
    outs.flush();
  }
  SECTION("Bottom unchanged default") {
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    CHECK(drawer.drawOptions().legendPosition ==
          MolDrawOptions::LegendPosition::Bottom);
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, legend);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
    CHECK(get_legend_xy(text, bottom_x, bottom_y));
    CHECK(bottom_y > 140.0);
    std::ofstream outs("testLegendPosition_bottom.svg");
    outs << text;
    outs.flush();
  }
  SECTION("Long vertical side legend fits panel height") {
    const std::string longName(48, 'M');
    MolDraw2DSVG drawer(160, 90, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendPosition = MolDrawOptions::LegendPosition::Left;
    drawer.drawOptions().legendVerticalText = true;
    drawer.drawOptions().legendFraction = 0.22f;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, longName);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    // At this size the fitted legend can be very small but should still be
    // present in the SVG and within the panel.
    CHECK(text.find("class='legend'") != std::string::npos);
    std::ofstream outs("testLegendPosition_long_vertical.svg");
    outs << text;
    outs.flush();
  }
}

TEST_CASE("legend options from JSON", "[drawing]") {
  auto m1 = "CCO"_smiles;
  REQUIRE(m1);
  SECTION("legendPosition and legendVerticalText parsed from JSON") {
    const char *json =
        R"({"legendPosition": "Top", "legendVerticalText": true})";
    MolDrawOptions opts;
    MolDraw2DUtils::updateMolDrawOptionsFromJSON(opts, json);
    CHECK(opts.legendPosition == MolDrawOptions::LegendPosition::Top);
    CHECK(opts.legendVerticalText == true);
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    drawer.drawOptions() = opts;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, "Ethanol");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
  }
  SECTION("legendPosition Left and legendFraction for side legend") {
    MolDraw2DSVG drawer(200, 200, -1, -1, NO_FREETYPE);
    drawer.drawOptions().legendPosition = MolDrawOptions::LegendPosition::Left;
    drawer.drawOptions().legendFraction = 0.25f;
    drawer.drawOptions().legendVerticalText = true;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1, "CCO");
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("class='legend'") != std::string::npos);
  }
}

TEST_CASE(
    "Github 5061 - draw reaction with no reagents and scaleBondWidth true") {
  SECTION("basics") {
    std::string data = R"RXN($RXN

  Mrv16425    091201171606

  0  1
$MOL

  Mrv1642509121716062D

  2  1  0  0  0  0            999 V2000
    3.5357    0.0000    0.0000 R#  0  0  0  0  0  0  0  0  0  0  0  0
    2.7107    0.0000    0.0000 R#  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
M  RGP  2   1   1   2   2


M  END)RXN";
    {
      std::unique_ptr<ChemicalReaction> rxn{RxnBlockToChemicalReaction(data)};
      MolDraw2DSVG drawer(450, 200);
      drawer.drawOptions().scaleBondWidth = true;
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testGithub_5061.svg");
      outs << text;
      outs.flush();
      check_file_hash("testGithub_5061.svg");
    }
  }
}

TEST_CASE("Github 5185 - don't draw atom indices between double bond") {
  SECTION("basics") {
    UseLegacyStereoPerceptionFixture fx(true);

    auto m1 = "OC(=O)CCCC(=O)O"_smiles;
    REQUIRE(m1);
    {
      // default legend
      MolDraw2DSVG drawer(400, 200, -1, -1);
      drawer.drawOptions().addAtomIndices = true;
      MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m1);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testGithub_5185.svg");
      outs << text;
      outs.flush();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
      // the 2nd note
      CHECK(text.find("<path class='note' d='M 94.4 129.6") !=
            std::string::npos);
      // check_file_hash("testGithub_5185.svg");
#else
      CHECK(text.find("<text x='91.5' y='130.0' class='note' ") !=
            std::string::npos);
#endif
    }
  }
}

TEST_CASE(
    "Github 5259 - drawReaction should not fail when prepareMolsBeforeDrawing "
    "is false") {
  SECTION("basics") {
    auto rxn = "[CH3:1][OH:2]>>[CH2:1]=[OH0:2]"_rxnsmarts;
    REQUIRE(rxn);
    MolDraw2DSVG drawer(400, 200, -1, -1);
    drawer.drawOptions().prepareMolsBeforeDrawing = false;
    REQUIRE_NOTHROW(drawer.drawReaction(*rxn));
  }
}

TEST_CASE("Github 5269 - bad index positions with highlights") {
  SECTION("basics") {
    auto m1 = "CC(=O)Oc1c(C(=O)O)cccc1"_smiles;
    auto q1 = "CC(=O)Oc1c(C(=O)O)cccc1"_smarts;
    REQUIRE(m1);
    REQUIRE(q1);
    {
      std::vector<int> hit_atoms;
      std::vector<MatchVectType> hits_vect;
      SubstructMatch(*m1, *q1, hits_vect);
      for (size_t i = 0; i < hits_vect.size(); ++i) {
        for (size_t j = 0; j < hits_vect[i].size(); ++j) {
          hit_atoms.push_back(hits_vect[i][j].second);
        }
      }
      std::vector<int> hit_bonds;
      for (int i : hit_atoms) {
        for (int j : hit_atoms) {
          if (i > j) {
            Bond *bnd = m1->getBondBetweenAtoms(i, j);
            if (bnd) {
              hit_bonds.push_back(bnd->getIdx());
            }
          }
        }
      }
      {
        MolDraw2DSVG drawer(400, 400, -1, -1);
        drawer.drawOptions().addAtomIndices = true;
        drawer.drawMolecule(*m1, &hit_atoms, &hit_bonds);
        drawer.finishDrawing();
        auto text = drawer.getDrawingText();
        std::ofstream outs("testGithub_5269_1.svg");
        outs << text;
        outs.flush();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
        check_file_hash("testGithub_5269_1.svg");
#endif
      }
    }
  }
  {
    auto m2 = "CN(C)C(C)C=O"_smiles;
    REQUIRE(m2);
    std::vector<int> hit_atoms{0, 1, 2};
    auto atom = m2->getAtomWithIdx(0);
    atom->setProp(common_properties::atomNote, "0.91");
    atom = m2->getAtomWithIdx(1);
    atom->setProp(common_properties::atomNote, "1.03");
    atom = m2->getAtomWithIdx(2);
    atom->setProp(common_properties::atomNote, "0.74");
    MolDraw2DSVG drawer(400, 400, -1, -1);
    drawer.drawMolecule(*m2, &hit_atoms);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testGithub_5269_2.svg");
    outs << text;
    outs.flush();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    check_file_hash("testGithub_5269_2.svg");
#endif
  }
}

#ifdef RDK_BUILD_CAIRO_SUPPORT
TEST_CASE("drawing doesn't destroy reaction properties", "[drawing]") {
  auto rxn = "[CH3:1][OH:2]>>[CH2:1]=[OH0:2]"_rxnsmarts;
  REQUIRE(rxn);
  MolDraw2DCairo drawer(400, 200);
  bool highlightByReactant = true;
  drawer.drawReaction(*rxn, highlightByReactant);
  drawer.finishDrawing();
  auto png = drawer.getDrawingText();
  std::unique_ptr<ChemicalReaction> rxn2{PNGStringToChemicalReaction(png)};
  REQUIRE(rxn2);
  CHECK(rxn->getReactants()[0]->getAtomWithIdx(0)->getAtomMapNum() == 1);
  CHECK(rxn->getReactants()[0]->getAtomWithIdx(1)->getAtomMapNum() == 2);
  CHECK(rxn2->getReactants()[0]->getAtomWithIdx(0)->getAtomMapNum() == 1);
  CHECK(rxn2->getReactants()[0]->getAtomWithIdx(1)->getAtomMapNum() == 2);
}
#endif

TEST_CASE("Class values in SVG for wavy bonds.") {
  SECTION("basics") {
    auto m1 = R"CTAB(mol1
  ChemDraw05162216032D

 11 11  0  0  0  0  0  0  0  0999 V2000
    1.1514    0.9038    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.1514    0.0788    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9360   -0.1762    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    2.4209    0.4913    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9360    1.1587    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.4369   -0.3337    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2775    0.0788    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9920   -0.3337    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7065    0.0788    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4209   -0.3337    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.4369   -1.1587    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0
  2  3  1  0
  3  4  2  0
  4  5  1  0
  5  1  1  0
  2  6  1  0
  6  7  1  0
  7  8  2  3
  8  9  1  0
  9 10  3  0
  6 11  1  4
M  END)CTAB"_ctab;
    REQUIRE(m1);
    auto b10 = m1->getBondWithIdx(10);
    b10->setBondDir(Bond::UNKNOWN);
    MolDraw2DSVG drawer(400, 400, -1, -1);
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("<path class='bond-10 atom-5 atom-10'") !=
          std::string::npos);
    std::ofstream outs("test_classes_wavy_bonds.svg");
    outs << text;
    outs.flush();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    check_file_hash("test_classes_wavy_bonds.svg");
#endif
  }
}

TEST_CASE("GitHub #5383: cairo error when using similarity maps", "") {
  auto m1 = "C1N[C@@H]2OCC12"_smiles;
  REQUIRE(m1);
  MolDraw2DUtils::prepareMolForDrawing(*m1);
  const auto conf = m1->getConformer();
  std::vector<Point2D> cents(conf.getNumAtoms());
  std::vector<double> weights(conf.getNumAtoms());
  std::vector<double> widths(conf.getNumAtoms());
  for (size_t i = 0; i < conf.getNumAtoms(); ++i) {
    cents[i] = Point2D(conf.getAtomPos(i).x, conf.getAtomPos(i).y);
    weights[i] = 1;
    widths[i] = 0.4 * PeriodicTable::getTable()->getRcovalent(
                          m1->getAtomWithIdx(i)->getAtomicNum());
  }

  SECTION("svg basics") {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().padding = 0.1;

    drawer.clearDrawing();
    std::vector<double> levels;
    MolDraw2DUtils::contourAndDrawGaussians(
        drawer, cents, weights, widths, 10, levels,
        MolDraw2DUtils::ContourParams(), m1.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("width='250px' height='250px' viewBox='0 0 250 250'>") !=
          std::string::npos);
    std::ofstream outs("github5383_1.svg");
    outs << text;
    outs.flush();
    check_file_hash("github5383_1.svg");
  }
  SECTION("svg basics") {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().padding = 0.0;

    drawer.clearDrawing();
    std::vector<double> levels;
    MolDraw2DUtils::contourAndDrawGaussians(
        drawer, cents, weights, widths, 10, levels,
        MolDraw2DUtils::ContourParams(), m1.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    CHECK(text.find("width='250px' height='250px' viewBox='0 0 250 250'>") !=
          std::string::npos);
    std::ofstream outs("github5383_2.svg");
    outs << text;
    outs.flush();
    check_file_hash("github5383_2.svg");
  }
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("cairo basics") {
    MolDraw2DCairo drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().padding = 0.1;

    drawer.clearDrawing();
    std::vector<double> levels;
    MolDraw2DUtils::contourAndDrawGaussians(
        drawer, cents, weights, widths, 10, levels,
        MolDraw2DUtils::ContourParams(), m1.get());

    drawer.drawOptions().clearBackground = false;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    drawer.writeDrawingText("github5383_1.png");
    check_file_hash("github5383_1.png");
  }
#endif
}

TEST_CASE("github #5156") {
  SECTION("basics") {
    SmilesParserParams ps;
    ps.sanitize = false;
    std::unique_ptr<RWMol> m{SmilesToMol("c1ccnc1", ps)};
    REQUIRE(m);
    unsigned int failed;
    MolOps::sanitizeMol(*m, failed,
                        MolOps::SANITIZE_ALL ^ MolOps::SANITIZE_KEKULIZE);
    MolDraw2DSVG d2d(200, 200);
    d2d.drawOptions().prepareMolsBeforeDrawing = false;
    d2d.drawMolecule(*m);
    d2d.finishDrawing();
    auto text = d2d.getDrawingText();
    // CHECK(text.find("width='250px' height='250px' viewBox='0 0 250 250'>") !=
    //       std::string::npos);
    std::ofstream outs("github5156_1.svg");
    outs << text;
    outs.flush();
    check_file_hash("github5156_1.svg");
  }
  SECTION("as reported") {
    auto m =
        "[#6](:,-[#6]-,:[#7]-,:[#6]1:[#6]:[#6]:[#6]:[#6]:[#6]:1):,-[#6]:,-[#7]:,-[#6]"_smarts;
    REQUIRE(m);
    MolDraw2DSVG d2d(200, 200);
    d2d.drawOptions().prepareMolsBeforeDrawing = false;
    d2d.drawMolecule(*m);
    d2d.finishDrawing();
    auto text = d2d.getDrawingText();
    // CHECK(text.find("width='250px' height='250px' viewBox='0 0 250 250'>") !=
    //       std::string::npos);
    std::ofstream outs("github5156_2.svg");
    outs << text;
    outs.flush();
    check_file_hash("github5156_2.svg");
  }
  SECTION("check no wedging") {
    // if we aren't preparing molecules, we won't end up with wedging in this
    // case
    auto m = "C[C@H](F)Cl"_smiles;
    REQUIRE(m);
    MolDraw2DSVG d2d(200, 200);
    d2d.drawOptions().prepareMolsBeforeDrawing = false;
    d2d.drawMolecule(*m);
    d2d.finishDrawing();
    auto text = d2d.getDrawingText();
    CHECK(text.find(" Z' style='fill=#000000") == std::string::npos);
    std::ofstream outs("github5156_3.svg");
    outs << text;
    outs.flush();
    check_file_hash("github5156_3.svg");
  }
}

TEST_CASE("ACS 1996 mode") {
  SECTION("basics") {
    std::string nameBase = "acs1996_";
    {
      auto m = R"CTAB(mol1
  ChemDraw05162216032D

 11 11  0  0  0  0  0  0  0  0999 V2000
    1.1514    0.9038    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.1514    0.0788    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9360   -0.1762    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    2.4209    0.4913    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9360    1.1587    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.4369   -0.3337    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2775    0.0788    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.9920   -0.3337    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7065    0.0788    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4209   -0.3337    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.4369   -1.1587    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  2  0
  2  3  1  0
  3  4  2  0
  4  5  1  0
  5  1  1  0
  2  6  1  0
  6  7  1  0
  7  8  2  3
  8  9  1  0
  9 10  3  0
  6 11  1  4
M  END)CTAB"_ctab;
      REQUIRE(m);
      {
        MolDraw2DSVG drawer(-1, -1);
        MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 1", nullptr, nullptr);
        drawer.finishDrawing();
        std::string text = drawer.getDrawingText();
        std::ofstream outs(nameBase + "1.svg");
        outs << text;
        outs.flush();
        outs.close();
        check_file_hash(nameBase + "1.svg");
      }
#ifdef RDK_BUILD_CAIRO_SUPPORT
      {
        MolDraw2DCairo drawer(-1, -1);
        MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 1", nullptr, nullptr);
        drawer.finishDrawing();
        drawer.writeDrawingText(nameBase + "1.png");
        check_file_hash(nameBase + "1.png");
      }
#endif
    }
    {
      auto m = R"CTAB(mol2
  ChemDraw06062216302D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 11 11 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C 1.151400 0.903800 0.000000 0
M  V30 2 C 1.151400 0.078800 0.000000 0
M  V30 3 N 1.935999 -0.176199 0.000000 0
M  V30 4 C 2.420899 0.491300 0.000000 0
M  V30 5 N 1.935999 1.158700 0.000000 0
M  V30 6 C 0.436900 -0.333700 0.000000 0
M  V30 7 C -0.277500 0.078800 0.000000 0
M  V30 8 C -0.992000 -0.333700 0.000000 0
M  V30 9 C -1.706500 0.078800 0.000000 0
M  V30 10 N -2.420899 -0.333700 0.000000 0
M  V30 11 C 0.436900 -1.158700 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 1 2
M  V30 2 1 2 3
M  V30 3 2 3 4
M  V30 4 1 4 5
M  V30 5 1 5 1
M  V30 6 1 2 6
M  V30 7 1 6 7
M  V30 8 2 7 8 CFG=2
M  V30 9 1 8 9
M  V30 10 3 9 10
M  V30 11 1 6 11 CFG=3
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEABS ATOMS=(1 6)
M  V30 END COLLECTION
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 2", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "2.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "2.svg");
#ifdef RDK_BUILD_CAIRO_SUPPORT
      {
        MolDraw2DCairo drawer(-1, -1);
        MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 2", nullptr, nullptr);
        drawer.finishDrawing();
        drawer.writeDrawingText(nameBase + "2.png");
        check_file_hash(nameBase + "2.png");
      }
#endif
    }
    {
      auto m = "C[C@H](I)CC(Cl)C[C@@H](F)C"_smiles;
      m->setProp<std::string>("_Name", "mol3");
      REQUIRE(m);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 3", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "3.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "3.svg");
    }
    {
      auto m = "CC(I)CC(Cl)CC(F)C"_smiles;
      m->setProp<std::string>("_Name", "mol4");
      REQUIRE(m);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawOptions().unspecifiedStereoIsUnknown = true;
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 4", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "4.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "4.svg");
    }
    {
      auto m = R"CTAB(mol5
  ChemDraw06112209342D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 30 33 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C -2.240810 -1.031250 0.000000 0
M  V30 2 C -2.240810 -0.206250 0.000000 0
M  V30 3 C -2.955281 0.206250 0.000000 0
M  V30 4 C -2.955281 1.031250 0.000000 0
M  V30 5 C -3.669752 1.443750 0.000000 0
M  V30 6 C -4.384224 1.031250 0.000000 0
M  V30 7 C -4.384224 0.206250 0.000000 0
M  V30 8 C -3.669752 -0.206250 0.000000 0
M  V30 9 Cl -3.669752 -1.031250 0.000000 0
M  V30 10 F -5.098694 -0.206250 0.000000 0
M  V30 11 Cl -2.240810 1.443750 0.000000 0
M  V30 12 O -1.526340 0.206250 0.000000 0
M  V30 13 C -0.811869 -0.206250 0.000000 0
M  V30 14 C -0.811869 -1.031250 0.000000 0
M  V30 15 N -0.097397 -1.443750 0.000000 0
M  V30 16 C 0.617074 -1.031250 0.000000 0
M  V30 17 C 0.617074 -0.206250 0.000000 0
M  V30 18 C -0.097397 0.206250 0.000000 0
M  V30 19 C 1.331544 0.206250 0.000000 0
M  V30 20 C 2.085220 -0.129308 0.000000 0
M  V30 21 N 2.637252 0.483787 0.000000 0
M  V30 22 N 2.224752 1.198258 0.000000 0
M  V30 23 C 1.417781 1.026730 0.000000 0
M  V30 24 C 3.457733 0.397551 0.000000 0
M  V30 25 C 3.942655 1.064990 0.000000 0
M  V30 26 C 4.763136 0.978754 0.000000 0
M  V30 27 N 5.098694 0.225079 0.000000 0
M  V30 28 C 4.613771 -0.442361 0.000000 0
M  V30 29 C 3.793290 -0.356124 0.000000 0
M  V30 30 N -1.526340 -1.443750 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 2 1 CFG=3
M  V30 2 1 2 3
M  V30 3 2 3 4
M  V30 4 1 4 5
M  V30 5 2 5 6
M  V30 6 1 6 7
M  V30 7 2 7 8
M  V30 8 1 3 8
M  V30 9 1 8 9
M  V30 10 1 7 10
M  V30 11 1 4 11
M  V30 12 1 2 12
M  V30 13 1 12 13
M  V30 14 2 13 14
M  V30 15 1 14 15
M  V30 16 2 15 16
M  V30 17 1 16 17
M  V30 18 2 17 18
M  V30 19 1 13 18
M  V30 20 1 17 19
M  V30 21 2 19 20
M  V30 22 1 20 21
M  V30 23 1 21 22
M  V30 24 2 22 23
M  V30 25 1 19 23
M  V30 26 1 21 24
M  V30 27 1 24 25
M  V30 28 1 25 26
M  V30 29 1 26 27
M  V30 30 1 27 28
M  V30 31 1 28 29
M  V30 32 1 24 29
M  V30 33 1 14 30
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEABS ATOMS=(1 2)
M  V30 END COLLECTION
M  V30 END CTAB
M  END
)CTAB"_ctab;
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 5", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "5.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "5.svg");
    }
    {
      auto m = R"CTAB(mol6
  ChemDraw06132212082D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 16 15 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -1.427702 0.413216 0.000000 0
M  V30 2 C -0.715712 0.824284 0.000000 0
M  V30 3 C -2.139692 0.824284 0.000000 0
M  V30 4 C -0.003721 0.413216 0.000000 0
M  V30 5 C 0.708270 0.824284 0.000000 0
M  V30 6 C 1.420260 0.413216 0.000000 0
M  V30 7 C 0.708270 1.646420 0.000000 0
M  V30 8 C -1.427702 -0.408920 0.000000 0
M  V30 9 C -0.715712 -0.819988 0.000000 0
M  V30 10 C -2.139692 -0.819988 0.000000 0
M  V30 11 C -0.003721 -0.408920 0.000000 0
M  V30 12 C 2.134731 0.825716 0.000000 0
M  V30 13 C 0.710751 -0.821420 0.000000 0
M  V30 14 C 1.425221 -0.408920 0.000000 0
M  V30 15 C 2.139692 -0.821420 0.000000 0
M  V30 16 C 2.139692 -1.646420 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 1 3
M  V30 3 1 2 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 1 5 7
M  V30 7 1 1 8
M  V30 8 2 8 9 CFG=2
M  V30 9 1 8 10
M  V30 10 1 9 11
M  V30 11 2 6 12
M  V30 12 2 11 13
M  V30 13 1 13 14
M  V30 14 2 14 15
M  V30 15 1 15 16
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 6", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "6.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "6.svg");
    }
    {
      auto m = R"CTAB(mol7
  ChemDraw06192209312D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 18 17 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -2.147146 0.827156 0.000000 0
M  V30 2 C -1.432676 1.239655 0.000000 0
M  V30 3 O -2.861616 1.239655 0.000000 0
M  V30 4 C -0.718205 0.827156 0.000000 0
M  V30 5 C -0.003735 1.239655 0.000000 0
M  V30 6 C 0.710736 0.827156 0.000000 0
M  V30 7 C -0.003735 2.064654 0.000000 0
M  V30 8 C -2.147146 0.002156 0.000000 0
M  V30 9 C -1.432676 -0.410344 0.000000 0
M  V30 10 C -2.861616 -0.410344 0.000000 0
M  V30 11 C -0.718205 0.002156 0.000000 0
M  V30 12 S 1.427695 1.241093 0.000000 0
M  V30 13 C -0.001244 -0.411781 0.000000 0
M  V30 14 C 0.715714 0.002156 0.000000 0
M  V30 15 C 1.432674 -0.411781 0.000000 0
M  V30 16 C 1.432674 -1.239654 0.000000 0
M  V30 17 C 2.147145 -1.652154 0.000000 0
M  V30 18 C 2.861616 -2.064654 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 1 3
M  V30 3 1 2 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 1 5 7
M  V30 7 1 1 8
M  V30 8 2 8 9 CFG=2
M  V30 9 1 8 10
M  V30 10 1 9 11
M  V30 11 2 6 12
M  V30 12 2 11 13
M  V30 13 1 13 14
M  V30 14 2 14 15
M  V30 15 1 15 16
M  V30 16 2 16 17
M  V30 17 2 17 18
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 7", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "7.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "7.svg");
    }
    {
      auto m = R"CTAB(mol8
  ChemDraw07042207302D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 18 17 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C -2.500648 -0.206250 0.000000 0
M  V30 2 C -1.786177 0.206250 0.000000 0
M  V30 3 C -1.071707 -0.206250 0.000000 0
M  V30 4 C -0.357237 0.206250 0.000000 0
M  V30 5 C 0.357236 -0.206250 0.000000 0
M  V30 6 C 1.071707 0.206250 0.000000 0
M  V30 7 C 1.786177 -0.206250 0.000000 0
M  V30 8 C 2.500648 0.206250 0.000000 0
M  V30 9 C -1.786177 1.031251 0.000000 0
M  V30 10 C -2.500648 1.443750 0.000000 0
M  V30 11 C -0.357237 1.031251 0.000000 0
M  V30 12 C -1.071707 1.443750 0.000000 0
M  V30 13 C 0.357236 1.443750 0.000000 0
M  V30 14 C 1.786177 -1.031250 0.000000 0
M  V30 15 C 2.500648 -1.443750 0.000000 0
M  V30 16 Cl 0.357236 -1.031250 0.000000 0
M  V30 17 C -1.071707 -1.031250 0.000000 0
M  V30 18 C 1.071707 1.031250 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 1 4 5
M  V30 5 1 5 6
M  V30 6 1 6 7
M  V30 7 1 7 8
M  V30 8 1 2 9 CFG=3
M  V30 9 1 9 10
M  V30 10 1 4 11 CFG=3
M  V30 11 1 11 12
M  V30 12 1 11 13
M  V30 13 1 7 14 CFG=3
M  V30 14 2 14 15
M  V30 15 1 5 16 CFG=3
M  V30 16 1 3 17
M  V30 17 1 6 18 CFG=3
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEABS ATOMS=(5 2 4 5 6 7)
M  V30 END COLLECTION
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 8", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "8.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "8.svg");
    }
    {
      auto m = R"CTAB(mol9
  ChemDraw06302215142D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 22 21 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C -2.857884 -0.412500 0.000000 0
M  V30 2 C -2.143413 0.000000 0.000000 0
M  V30 3 C -1.428942 -0.412500 0.000000 0
M  V30 4 C -0.714471 0.000000 0.000000 0
M  V30 5 C 0.000000 -0.412500 0.000000 0
M  V30 6 C 0.714471 0.000000 0.000000 0
M  V30 7 C 1.428941 -0.412500 0.000000 0
M  V30 8 C 2.143413 0.000000 0.000000 0
M  V30 9 C -2.143413 0.825000 0.000000 0
M  V30 10 C -2.857884 1.237500 0.000000 0
M  V30 11 C -0.714471 0.825000 0.000000 0
M  V30 12 C -1.428942 1.237500 0.000000 0
M  V30 13 C 0.000000 1.237500 0.000000 0
M  V30 14 C 1.428941 -1.237500 0.000000 0
M  V30 15 C 2.143413 -1.650000 0.000000 0
M  V30 16 Cl 0.000000 -1.237500 0.000000 0
M  V30 17 C -1.428942 -1.237500 0.000000 0
M  V30 18 C 2.857884 -0.412500 0.000000 0
M  V30 19 C 2.143413 0.825000 0.000000 0
M  V30 20 C 1.428941 1.237500 0.000000 0
M  V30 21 C 2.857884 1.237500 0.000000 0
M  V30 22 C 2.143413 1.650000 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 1 4 5
M  V30 5 1 5 6
M  V30 6 1 6 7
M  V30 7 1 7 8
M  V30 8 1 2 9 CFG=1
M  V30 9 1 9 10
M  V30 10 1 4 11 CFG=1
M  V30 11 1 11 12
M  V30 12 1 11 13
M  V30 13 1 7 14 CFG=1
M  V30 14 2 14 15
M  V30 15 1 5 16 CFG=1
M  V30 16 1 3 17
M  V30 17 1 8 18
M  V30 18 1 8 19 CFG=1
M  V30 19 1 19 20
M  V30 20 1 19 21
M  V30 21 1 19 22
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEABS ATOMS=(5 2 4 5 7 8)
M  V30 END COLLECTION
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawOptions().useMolBlockWedging = true;
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 9", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "9.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "9.svg");
    }
    {
      auto m = R"CTAB(mol10
  ChemDraw07062213362D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 8 7 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C -0.357235 -1.031250 0.000000 0
M  V30 2 C -0.357235 -0.206250 0.000000 0
M  V30 3 N -1.071706 0.206250 0.000000 0
M  V30 4 O -1.786177 -0.206250 0.000000 0
M  V30 5 C 0.357236 0.206250 0.000000 0
M  V30 6 N 1.071706 -0.206250 0.000000 0
M  V30 7 O 1.786177 0.206250 0.000000 0
M  V30 8 C 0.357236 1.031250 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3 CFG=2
M  V30 3 1 3 4
M  V30 4 1 2 5
M  V30 5 2 5 6 CFG=2
M  V30 6 1 6 7
M  V30 7 1 5 8
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
      REQUIRE(m);
      MolDraw2DSVG drawer(-1, -1);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 10", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "10.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "10.svg");
    }
    {
      auto m = "CCOC(=O)Nc1ccc(SCC2COC(Cn3ccnc3)(c3ccc(Cl)cc3Cl)O2)cc1"_smiles;
      REQUIRE(m);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      std::vector<int> highlight_atoms{17, 18, 19, 20, 21, 6, 7, 8, 9, 31, 32};
      std::map<int, DrawColour> atom_highlight_colors;
      atom_highlight_colors[8] = DrawColour(1.0, 1.0, 0.0);
      atom_highlight_colors[31] = DrawColour(0.0, 1.0, 1.0);
      std::vector<int> highlight_bonds{0, 1, 2, 11, 15, 19};
      std::map<int, DrawColour> bond_highlight_colors;
      bond_highlight_colors[0] = DrawColour(1.0, 1.0, 0.0);
      bond_highlight_colors[11] = DrawColour(0.0, 1.0, 1.0);
      MolDrawOptions options;
      options.circleAtoms = true;
      options.highlightColour = DrawColour(1, .5, .5);
      options.continuousHighlight = true;
      MolDraw2DSVG drawer(-1, -1);
      drawer.drawOptions() = options;
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 11", &highlight_atoms,
                                     &highlight_bonds, &atom_highlight_colors,
                                     &bond_highlight_colors);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "11.svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + "11.svg");
    }
    auto drawnBondLength = [&](const std::string &r1,
                               const std::string &t) -> double {
      std::regex regex1(r1);
      auto match_begin = std::sregex_iterator(t.begin(), t.end(), regex1);
      auto match_end = std::sregex_iterator();
      std::vector<Point2D> ends;
      for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
        std::smatch match = *i;
        ends.push_back(Point2D(std::stod(match[1]), std::stod(match[2])));
        ends.push_back(Point2D(std::stod(match[3]), std::stod(match[4])));
      }
      return (ends[0] - ends[1]).length();
    };

    {
      // make sure it also works with an arbitrarily sized drawer.
      auto m = "c1ccccc1"_smiles;
      REQUIRE(m);
      MolDraw2DUtils::prepareMolForDrawing(*m);
      MolDraw2DSVG drawer(500, 500);
      MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 12", nullptr, nullptr);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "12.svg");
      outs << text;
      outs.flush();
      outs.close();

      std::string regex =
          R"(class='bond-0 atom-0 atom-1' d='M ([\d.]*),([\d.]*) L ([\d.]*),([\d.]*)')";
      double dbl = drawnBondLength(regex, text);
      // the bonds should all be 14.4 long, but the SVG is only written
      // to 1 decimal place, so rounding errors are largish.
      CHECK(dbl == Catch::Approx(14.4253));
      regex =
          R"(class='bond-1 atom-1 atom-2' d='M ([\d.]*),([\d.]*) L ([\d.]*),([\d.]*)')";
      dbl = drawnBondLength(regex, text);
      CHECK_THAT(dbl, Catch::Matchers::WithinAbs(14.4, 0.1));
      check_file_hash(nameBase + "12.svg");
    }
  }
}

TEST_CASE("Unspecified stereochemistry means unknown.", "") {
  auto m1 = "ClC(I)(F)C=CC"_smiles;
  REQUIRE(m1);
  MolDraw2DUtils::prepareMolForDrawing(*m1);
  MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
  drawer.drawOptions().unspecifiedStereoIsUnknown = true;
  drawer.drawMolecule(*m1);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("test_unspec_stereo.svg");
  outs << text;
  outs.flush();

  std::regex regex1("class='bond-2 atom-1 atom-3' .*M.*C");
  std::smatch wavyMatch;
  CHECK(std::regex_search(text, wavyMatch, regex1));
  CHECK(wavyMatch.size() == 1);

  std::regex regex2(
      "class='bond-4 atom-4 atom-5' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L "
      "(\\d+\\.\\d+),(\\d+\\.\\d+)'");

  std::ptrdiff_t const match_count(
      std::distance(std::sregex_iterator(text.begin(), text.end(), regex2),
                    std::sregex_iterator()));
  CHECK(match_count == 2);

  // Check that the 2 bonds aren't parallel
  auto cross1Match = std::sregex_iterator(text.begin(), text.end(), regex2);
  Point2D point1{stod((*cross1Match)[1]), stod((*cross1Match)[2])};
  Point2D point2{stod((*cross1Match)[3]), stod((*cross1Match)[4])};
  auto vec1 = point1.directionVector(point2);

  ++cross1Match;
  Point2D point3{stod((*cross1Match)[1]), stod((*cross1Match)[2])};
  Point2D point4{stod((*cross1Match)[3]), stod((*cross1Match)[4])};
  auto vec2 = point3.directionVector(point4);
  CHECK(vec1.dotProduct(vec2) != Catch::Approx(1.0).margin(1.0e-4));

  check_file_hash("test_unspec_stereo.svg");
}

TEST_CASE("Colour H light blue with no atom labels", "") {
  auto m1 = "C[C@]12CCCC[C@H]1OCCC2"_smiles;
  MolDraw2DUtils::prepareMolForDrawing(*m1);
  MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
  drawer.drawOptions().noAtomLabels = true;
  drawer.drawMolecule(*m1);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("light_blue_h_no_label_1.svg");
  outs << text;
  outs.flush();
  std::regex regex1(R"(class='bond-12 atom-6 atom-11'.*fill:#ADD8E5)");
  std::smatch regex1Match;
  CHECK(std::regex_search(text, regex1Match, regex1));
  CHECK(regex1Match.size() == 1);
  check_file_hash("light_blue_h_no_label_1.svg");
}

TEST_CASE("Bond Highlights", "") {
  auto m1 = "c1c(OCC)cncc1CCCC=O"_smiles;
  REQUIRE(m1);
  MolDraw2DUtils::prepareMolForDrawing(*m1);
  {
    // only bonds highlighted, continuous highlighting, highlights
    // joining neatly.
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().addBondIndices = true;
    std::vector<int> highAts{};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    //    std::vector<int> highBnds{0, 1, 4};
    drawer.drawMolecule(*m1, &highAts, &highBnds);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_1.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_1.svg");
  }
  {
    // same as 1, but with highlighting as coloured bonds.  The O for
    // atom 2 is red because it is not highlighted, though bond 1 from
    // the pyridyl is.
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    std::vector<int> highAts{};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    drawer.drawOptions().continuousHighlight = false;
    drawer.drawOptions().circleAtoms = false;
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m1, &highAts, &highBnds);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_2.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_2.svg");
  }
  {
    // same bonds highlighted, but some atoms highlighted with
    // different colours.  Where an atom and a bond off it are
    // highlighted in different colours, the bond colour takes
    // precedence and the atom highlight is lost unless it has
    // an atom symbol drawn or there's a non-highlighted bond
    // off it.  Thus half of bond 8 should be green, as is
    // the N of atom 6 and the two half bonds off atom 10.
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    std::vector<int> highAts{0, 1, 5, 6, 7, 8, 10};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    std::map<int, DrawColour> atom_highlight_colors;
    atom_highlight_colors[0] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[5] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[6] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[7] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[8] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[10] = DrawColour(0.0, 1.0, 0.0);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawOptions().continuousHighlight = false;
    drawer.drawOptions().circleAtoms = false;
    drawer.drawMolecule(*m1, &highAts, &highBnds, &atom_highlight_colors);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_3.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_3.svg");
  }
  {
    // same as 3, except that the N on atom 6 isn't highlighted,
    // but both bonds off it are, so it gets the highlight colour.
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    std::vector<int> highAts{0, 1, 5, 7, 8, 10};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    std::map<int, DrawColour> atom_highlight_colors;
    atom_highlight_colors[0] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[5] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[7] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[8] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[10] = DrawColour(0.0, 1.0, 0.0);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawOptions().continuousHighlight = false;
    drawer.drawOptions().circleAtoms = false;
    drawer.drawMolecule(*m1, &highAts, &highBnds, &atom_highlight_colors);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_4.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_4.svg");
  }
  {
    // same as 4, except that atom 6 has a highlight colour assigned
    // in the map, but isn't highlighted.  It just happens that it's
    // the default highlight colour.
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    std::vector<int> highAts{0, 1, 5, 7, 8, 10};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    std::map<int, DrawColour> atom_highlight_colors;
    atom_highlight_colors[0] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[5] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[6] = drawer.drawOptions().highlightColour;
    atom_highlight_colors[7] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[8] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[10] = DrawColour(0.0, 1.0, 0.0);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawOptions().continuousHighlight = false;
    drawer.drawOptions().circleAtoms = false;
    drawer.drawMolecule(*m1, &highAts, &highBnds, &atom_highlight_colors);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_5.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_5.svg");
  }
  {
    // same as 3, but showing that atom circles can be used
    // to rescue the missing atom highlights.
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    std::vector<int> highAts{0, 1, 5, 6, 7, 8, 10};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    std::map<int, DrawColour> atom_highlight_colors;
    atom_highlight_colors[0] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[5] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[6] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[7] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[8] = DrawColour(0.0, 1.0, 0.0);
    atom_highlight_colors[10] = DrawColour(0.0, 1.0, 0.0);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawOptions().continuousHighlight = false;
    drawer.drawOptions().circleAtoms = true;
    drawer.drawMolecule(*m1, &highAts, &highBnds, &atom_highlight_colors);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_6.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_6.svg");
  }
  {
    // same as 1, but in ACS1996 mode.
    MolDraw2DSVG drawer(-1, -1, -1, -1, NO_FREETYPE);
    std::vector<int> highAts{};
    std::vector<int> highBnds{0, 1, 4, 5, 6, 7, 13};
    drawer.drawOptions().continuousHighlight = false;
    drawer.drawOptions().circleAtoms = false;
    MolDraw2DUtils::drawMolACS1996(drawer, *m1, "", &highAts, &highBnds);
    drawer.drawMolecule(*m1, &highAts, &highBnds);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_7.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_7.svg");
  }
  {
    // check 3- and 4-way intersections of continuous highlights are ok
    auto m = "c1c(C(C)(C)C)cccc1"_smiles;
    REQUIRE(m);
    MolDraw2DUtils::prepareMolForDrawing(*m);
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().continuousHighlight = true;
    drawer.drawOptions().addBondIndices = true;
    std::vector<int> highBnds{0, 1, 2, 3, 4, 5, 6};
    std::map<int, DrawColour> bond_highlight_colors;
    bond_highlight_colors[0] = DrawColour(1.0, 0.0, 0.0);
    bond_highlight_colors[1] = DrawColour(0.0, 1.0, 0.0);
    bond_highlight_colors[3] = DrawColour(1.0, 0.0, 0.0);
    bond_highlight_colors[4] = DrawColour(0.0, 1.0, 0.0);
    bond_highlight_colors[5] = DrawColour(0.0, 0.0, 1.0);
    drawer.drawMolecule(*m, nullptr, &highBnds, nullptr,
                        &bond_highlight_colors);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_8.svg");
    outs << text;
    outs.flush();
    check_file_hash("bond_highlights_8.svg");
  }
  {
    // cyclopropane (Github5592)
    auto m = "CC1CC1"_smiles;
    REQUIRE(m);
    MolDraw2DUtils::prepareMolForDrawing(*m);
    std::vector<int> highBnds{1, 2, 3};
    std::map<int, DrawColour> bond_highlight_colors;
    bond_highlight_colors[1] = DrawColour(1.0, 0.0, 0.0);
    bond_highlight_colors[2] = DrawColour(0.0, 1.0, 0.0);
    bond_highlight_colors[3] = DrawColour(0.0, 0.0, 1.0);
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().continuousHighlight = true;
    drawer.drawMolecule(*m, nullptr, &highBnds, nullptr,
                        &bond_highlight_colors);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("bond_highlights_9.svg");
    outs << text;
    std::regex regex1(
        R"(class='bond-[\d*] atom-[\d] atom-[\d]' d='M ([\d.]*),([\d.]*) L ([\d.]*),([\d.]*) L ([\d.]*),([\d.]*) L ([\d.]*),([\d.]*) Z')");
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), regex1);
    auto match_end = std::sregex_iterator();
    std::vector<Point2D> ends;
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      // with this result, match[0] is the whole string that matched,
      // match[1] is the 1st float (the x coord of the M), match[2]
      // is the 2nd float, etc.
      std::smatch match = *i;
      ends.push_back(Point2D(std::stod(match[1]), std::stod(match[2])));
      ends.push_back(Point2D(std::stod(match[3]), std::stod(match[4])));
      ends.push_back(Point2D(std::stod(match[5]), std::stod(match[6])));
      ends.push_back(Point2D(std::stod(match[7]), std::stod(match[8])));
    }
    CHECK(ends.size() == 12);
    // When this had a bug in it, it drew a butterfly-type motif, because
    // ends 2 and 3 were the wrong way round.
    for (int i = 0; i < 12; i += 4) {
      CHECK(!MolDraw2D_detail::doLinesIntersect(
          ends[i], ends[i + 3], ends[i + 1], ends[i + 2], nullptr));
    }
    outs.flush();
    check_file_hash("bond_highlights_9.svg");
  }
}

TEST_CASE("drawMolecules should not crash on null molecules",
          "[drawing][bug]") {
  auto m1 = "c1ccccc1"_smiles;
  auto m2 = "c1ccncc1"_smiles;
  REQUIRE(m1);
  REQUIRE(m2);
  MolDraw2DSVG drawer(1000, 200, 100, 100, NO_FREETYPE);
  RWMol dm1(*m1);
  RWMol dm2(*m2);
  MOL_PTR_VECT ms{&dm1,    nullptr, nullptr, nullptr, nullptr, nullptr,
                  nullptr, nullptr, nullptr, nullptr, &dm2};
  drawer.drawMolecules(ms);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::regex regex1("<path d=");
  auto nMatches =
      std::distance(std::sregex_iterator(text.begin(), text.end(), regex1),
                    std::sregex_iterator());
  CHECK(nMatches == 11);
}

TEST_CASE("Crossed bonds in transdecene") {
  SECTION("basics") {
    std::string nameBase = "testGithub5486_";
    {
      auto m = R"CTAB(
  ChemDraw08042214332D

 10 10  0  0  0  0  0  0  0  0999 V2000
   -1.4289    0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.4289   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7145   -0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000    0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7145    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145   -0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289   -0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.4289    0.4125    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7145    0.8250    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  3  4  1  0
  5  6  2  0
  6  1  1  0
  4  7  1  0
  7  8  1  0
  8  9  1  0
  9 10  1  0
 10  5  1  0
M  END)CTAB"_ctab;
      REQUIRE(m);
      {
        MolDraw2DSVG drawer(300, 300);
        drawer.drawMolecule(*m);
        drawer.finishDrawing();
        std::string text = drawer.getDrawingText();
        std::ofstream outs(nameBase + "1.svg");
        outs << text;
        outs.flush();
        outs.close();
        std::regex regex1(
            R"(class='bond-3 atom-4 atom-5' d='M ([\d.]*),([\d.]*) L ([\d.]*),([\d.]*)')");
        auto match_begin =
            std::sregex_iterator(text.begin(), text.end(), regex1);
        auto match_end = std::sregex_iterator();
        std::vector<Point2D> ends;
        for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
          std::smatch match = *i;
          ends.push_back(Point2D(std::stod(match[1]), std::stod(match[2])));
          ends.push_back(Point2D(std::stod(match[3]), std::stod(match[4])));
        }
        CHECK(ends.size() == 4);
        CHECK(!MolDraw2D_detail::doLinesIntersect(ends[0], ends[1], ends[2],
                                                  ends[3], nullptr));
        check_file_hash(nameBase + "1.svg");
      }
    }
  }
}

TEST_CASE("Bad O position in aldehydes", "") {
  std::string nameBase("testGithub5511_");
  {
    auto m1 = "O=Cc1cccc(C=O)c1"_smiles;
    REQUIRE(m1);
    MolDraw2DUtils::prepareMolForDrawing(*m1);
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::string filename = nameBase + "1.svg";
    std::ofstream outs(filename);
    outs << text;
    outs.flush();
    check_file_hash(filename);
  }
  {
    auto m = R"CTAB(
     RDKit          2D

 11 11  0  0  0  0  0  0  0  0999 V2000
   -4.2885    0.5445    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.9895    1.2945    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6818    0.5394    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3738    1.2945    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.9342    0.5394    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2422    1.2945    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.2422    2.7945    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.9342   -0.9708    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3738   -1.7262    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6818   -0.9708    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.9895   -1.7262    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  3  4  2  0
  4  5  1  0
  5  6  1  0
  6  7  2  0
  5  8  2  0
  8  9  1  0
  9 10  2  0
 10 11  1  0
 10  3  1  0
M  END
)CTAB"_ctab;
    REQUIRE(m);
    MolDraw2DSVG drawer(250, 250, -1, -1);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string filename = nameBase + "2.svg";
    std::ofstream outs(filename);
    outs << text;
    outs.flush();
    check_file_hash(filename);
  }
}

TEST_CASE("Github5534") {
  std::string nameBase = "test_github_5534";
  {
    auto m = R"CTAB(
  INFOCHEM          2D 1   1.00000     0.00000     0

 45 45  0  0  0  0  0  0  0  0999 V2000
   -1.3388    1.6804    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0303    1.6804    0.0000 Si  0  0  0  0  0  0  0  0  0  0  0  0
   -1.0303    1.9890    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0303    1.3609    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496   -0.6997    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496   -0.3581    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496   -0.0386    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496    0.2810    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496    0.6116    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0826    0.9532    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496   -1.0193    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496   -1.3499    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.0496   -1.6694    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116   -0.6997    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116   -0.3581    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116   -0.0386    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116    0.2810    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116    0.6116    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116    0.9532    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116   -1.0193    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116   -1.3499    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    0.6116   -1.6694    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    1.0303    1.6804    0.0000 Si  0  0  0  0  0  0  0  0  0  0  0  0
    1.0303    2.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0303    1.3609    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.3388    1.6804    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -0.6997    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -0.3581    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -0.0386    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810    0.2810    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810    0.6116    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810    0.9532    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3361    1.2948    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.1708    1.4601    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.3581    1.6804    0.0000 Si  0  0  0  0  0  0  0  0  0  0  0  0
    0.0275    1.6804    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.3581    1.9890    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -1.0193    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -1.3499    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -1.6694    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2810   -2.0000    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6997    1.6804    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3691    1.6804    0.0000 Si  0  0  0  0  0  0  0  0  0  0  0  0
   -0.3691    1.9890    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3691    1.3609    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  1 23  1  0  0  0  0
  1 35  1  0  0  0  0
  2  3  1  0  0  0  0
  2  4  1  0  0  0  0
  2 42  1  0  0  0  0
  5 27  1  0  0  0  0
  6 28  1  0  0  0  0
  7 29  1  0  0  0  0
  8 30  1  0  0  0  0
  9 31  1  0  0  0  0
 10 32  1  0  0  0  0
 11 38  1  0  0  0  0
 12 39  1  0  0  0  0
 13 40  1  0  0  0  0
 14 27  1  0  0  0  0
 15 28  1  0  0  0  0
 16 29  1  0  0  0  0
 17 30  1  0  0  0  0
 18 31  1  0  0  0  0
 19 32  1  0  0  0  0
 20 38  1  0  0  0  0
 21 39  1  0  0  0  0
 22 40  1  0  0  0  0
 23 24  1  0  0  0  0
 23 25  1  0  0  0  0
 23 26  1  0  0  0  0
 27 28  1  0  0  0  0
 27 38  1  0  0  0  0
 28 29  1  0  0  0  0
 29 30  1  0  0  0  0
 30 31  1  0  0  0  0
 31 32  1  0  0  0  0
 32 33  1  0  0  0  0
 33 34  1  0  0  0  0
 34 35  1  0  0  0  0
 35 36  1  0  0  0  0
 35 37  1  0  0  0  0
 36 43  1  0  0  0  0
 38 39  1  0  0  0  0
 39 40  1  0  0  0  0
 40 41  1  0  0  0  0
 42 43  1  0  0  0  0
 43 44  1  0  0  0  0
 43 45  1  0  0  0  0
M  STY  2   1 GEN   2 GEN
M  SAL   1 15  27  28  29  30  31  32  33  34  35  36  37  38  39  40  41
M  SBL   1 15   7  16   8  17   9  18  10  19  11  20  12  21   3  39  13
M  SBL   1  5  22  14  23  15  24
M  SDI   1  4   -0.0386    2.0661   -0.0386    1.1846
M  SDI   1  4    0.4683    2.0661    0.4683    1.1846
M  SAL   2  4  42  43  44  45
M  SBL   2  2   6  39
M  SDI   2  4   -0.7658    2.0661   -0.7658    1.1846
M  SDI   2  4   -0.2149    2.0661   -0.2149    1.1846
M  END
)CTAB"_ctab;
    REQUIRE(m);
    {
      MolDraw2DSVG drawer(300, 300, 300, 300, NO_FREETYPE);
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + ".svg");
      outs << text;
      outs.flush();
      outs.close();
      check_file_hash(nameBase + ".svg");
    }
  }
}

TEST_CASE(
    "Github5704: set bond highlight color when atom highlight color changes") {
  std::string nameBase = "test_github5704";

  auto m =
      "CCCO |(-1.97961,-0.1365,;-0.599379,0.450827,;0.599379,-0.450827,;1.97961,0.1365,)|"_smiles;
  REQUIRE(m);
  std::regex redline(R"RE(<path .*fill:#FF7F7F)RE");
  std::regex blueline(R"RE(<path .*fill:#4C4CFF)RE");

  SECTION("no atom colors specified, default behavior") {
    MolDraw2DSVG drawer(300, 300, 300, 300, NO_FREETYPE);
    std::vector<int> aids{0, 1, 2};
    drawer.drawMolecule(*m, "red bond highlight", &aids);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();

    std::smatch rematch;
    CHECK(std::regex_search(text, rematch, redline));
    CHECK(!std::regex_search(text, rematch, blueline));

    std::ofstream outs(nameBase + "_1.svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash(nameBase + "_1.svg");
  }

  SECTION("both ends specified") {
    MolDraw2DSVG drawer(300, 300, 300, 300, NO_FREETYPE);
    std::vector<int> aids{0, 1, 2};
    std::map<int, DrawColour> acolors{
        {0, {.3, .3, 1}}, {1, {.3, .3, 1}}, {2, {.3, .3, 1}}};
    drawer.drawMolecule(*m, "blue bond highlight", &aids, &acolors);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();

    std::smatch rematch;
    CHECK(!std::regex_search(text, rematch, redline));
    CHECK(std::regex_search(text, rematch, blueline));

    std::ofstream outs(nameBase + "_2.svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash(nameBase + "_2.svg");
  }

  SECTION("color just on begin") {
    MolDraw2DSVG drawer(300, 300, 300, 300, NO_FREETYPE);
    std::vector<int> aids{0, 1};
    std::map<int, DrawColour> acolors{{0, {.3, .3, 1}}};
    drawer.drawMolecule(*m, "blue bond highlight", &aids, &acolors);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();

    std::smatch rematch;
    CHECK(!std::regex_search(text, rematch, redline));
    CHECK(std::regex_search(text, rematch, blueline));

    std::ofstream outs(nameBase + "_3.svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash(nameBase + "_3.svg");
  }
  SECTION("color just on end") {
    MolDraw2DSVG drawer(300, 300, 300, 300, NO_FREETYPE);
    std::vector<int> aids{0, 1};
    std::map<int, DrawColour> acolors{{1, {.3, .3, 1}}};
    drawer.drawMolecule(*m, "blue bond highlight", &aids, &acolors);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();

    std::smatch rematch;

    CHECK(!std::regex_search(text, rematch, redline));
    CHECK(std::regex_search(text, rematch, blueline));

    std::ofstream outs(nameBase + "_4.svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash(nameBase + "_4.svg");
  }
}

TEST_CASE("Github5767: monomer label missing for MON SGroups ") {
  std::string nameBase = "test_github5767";
  auto m = R"CTAB(
  Marvin  06091012252D

 13 11  0  0  0  0            999 V2000
   -3.5063    2.1509    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7918    2.5634    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0773    2.1509    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.3628    2.5634    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6484    2.1509    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0661    2.5634    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7806    2.1509    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -2.9984   -0.4714    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.2839   -0.0589    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5695   -0.4714    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.8550   -0.0589    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
   -2.9984    0.3536    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    0.6777   -0.1775    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
  9 12  1  0  0  0  0
 12  8  1  0  0  0  0
M  STY  2   1 MON   2 MON
M  SAL   1  7   1   2   3   4   5   6   7
M  SDI   1  4   -3.9263    1.7309   -3.9263    2.9834
M  SDI   1  4    1.2006    2.9834    1.2006    1.7309
M  SAL   2  5   8   9  10  11  12
M  SDI   2  4   -3.4184   -0.8914   -3.4184    0.7736
M  SDI   2  4   -0.4350    0.7736   -0.4350   -0.8914
M  END
)CTAB"_ctab;
  REQUIRE(m);
  {
    MolDraw2DSVG drawer(300, 300, 300, 300, true);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();
    // there should be 2 each of " >[mon]</text>"
    std::vector<std::string> needed{" >m</text>", " >o</text>", " >n</text>"};
    for (const auto &n : needed) {
      std::regex rn(n);
      std::ptrdiff_t const match_count(
          std::distance(std::sregex_iterator(text.begin(), text.end(), rn),
                        std::sregex_iterator()));
      CHECK(match_count == 2);
    }
    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE("Github5947: Ellipse extremes not calculated correctly.") {
  std::string nameBase = "test_github5947";
  auto m = "c1ccccn1"_smiles;
  TEST_ASSERT(m);
  RDDepict::compute2DCoords(*m);
  std::vector<int> highlight_atoms{0, 1, 2, 3, 4, 5};
  MolDraw2DSVG drawer(400, 400);
  drawer.drawOptions().highlightRadius = 1.0;
  drawer.drawMolecule(*m, &highlight_atoms);
  drawer.finishDrawing();
  std::string text = drawer.getDrawingText();
  std::ofstream outs(nameBase + ".svg");
  outs << text;
  outs.flush();
  outs.close();
  std::regex r1("<ellipse cx=.*rx='(\\d+\\.\\d+)' ry='(\\d+\\.\\d+)'");
  std::ptrdiff_t const match_count(
      std::distance(std::sregex_iterator(text.begin(), text.end(), r1),
                    std::sregex_iterator()));
  CHECK(match_count == 6);
  // all the ellipses should have a radius of roughly 72.0
  auto match_begin = std::sregex_iterator(text.begin(), text.end(), r1);
  auto match_end = std::sregex_iterator();
  for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
    std::smatch match = *i;
    CHECK_THAT(stod(match[1]), Catch::Matchers::WithinAbs(72.0, 0.1));
    CHECK_THAT(stod(match[2]), Catch::Matchers::WithinAbs(72.0, 0.1));
  }

  // check that the first ellipse is in the right place
  std::regex r2("<ellipse cx='(\\d+\\.\\d+)' cy='(\\d+\\.\\d+)'");
  auto ell1 = *std::sregex_iterator(text.begin(), text.end(), r2);
#ifdef RDK_BUILD_FREETYPE_SUPPORT
  CHECK_THAT(stod(ell1[1]), Catch::Matchers::WithinAbs(308.0, 0.1));
  CHECK_THAT(stod(ell1[2]), Catch::Matchers::WithinAbs(200.0, 1.1));
#else
  CHECK_THAT(stod(ell1[1]), Catch::Matchers::WithinAbs(308.0, 0.1));
  CHECK_THAT(stod(ell1[2]), Catch::Matchers::WithinAbs(198.0, 0.1));
#endif
  check_file_hash(nameBase + ".svg");
}

TEST_CASE("Github5943: bad ellipses for atom end points") {
  std::string nameBase = "test_github5943";
  auto m = R"CTAB(ferrocene
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 15 14 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 0.619616 1.206807 0.000000 0 CHG=-1
M  V30 2 C 0.211483 1.768553 0.000000 0
M  V30 3 C -1.283936 1.861329 0.000000 0
M  V30 4 C -1.796429 1.358429 0.000000 0
M  V30 5 C -0.634726 0.966480 0.000000 0
M  V30 6 C 0.654379 -1.415344 0.000000 0 CHG=-1
M  V30 7 C 0.249886 -0.858607 0.000000 0
M  V30 8 C -1.232145 -0.766661 0.000000 0
M  V30 9 C -1.740121 -1.265073 0.000000 0
M  V30 10 C -0.580425 -1.662922 0.000000 0
M  V30 11 C 1.759743 0.755930 0.000000 0
M  V30 12 C 1.796429 -1.861329 0.000000 0
M  V30 13 Fe -0.554442 0.032137 0.000000 0 VAL=2
M  V30 14 * -0.601210 1.478619 0.000000 0
M  V30 15 * -0.537835 -1.172363 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 5
M  V30 2 2 4 5
M  V30 3 1 4 3
M  V30 4 2 2 3
M  V30 5 1 1 2
M  V30 6 1 6 10
M  V30 7 2 9 10
M  V30 8 1 9 8
M  V30 9 2 7 8
M  V30 10 1 6 7
M  V30 11 1 1 11
M  V30 12 1 6 12
M  V30 13 9 14 13 ENDPTS=(5 1 2 3 4 5) ATTACH=ANY
M  V30 14 9 15 13 ENDPTS=(5 9 10 7 8 6) ATTACH=ANY
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
  REQUIRE(m);
  {
    MolDraw2DSVG drawer(300, 300, 300, 300, true);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();
    std::regex r("<ellipse cx=.*rx='(\\d+\\.\\d+)' ry='(\\d+\\.\\d+)'");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), r),
                      std::sregex_iterator()));
    CHECK(match_count == 10);

    // all the ellipses should have a radius of roughly 25.2.
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), r);
    auto match_end = std::sregex_iterator();
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      CHECK_THAT(stod(match[1]), Catch::Matchers::WithinAbs(25.0, 0.1));
      CHECK_THAT(stod(match[2]), Catch::Matchers::WithinAbs(25.0, 0.1));
    }
    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE("Github5949: fixed size for dative arrow heads") {
  std::string nameBase = "test_github5949";
  auto m = R"CTAB(ferrocene
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 15 14 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 0.619616 1.206807 0.000000 0 CHG=-1
M  V30 2 C 0.211483 1.768553 0.000000 0
M  V30 3 C -1.283936 1.861329 0.000000 0
M  V30 4 C -1.796429 1.358429 0.000000 0
M  V30 5 C -0.634726 0.966480 0.000000 0
M  V30 6 C 0.654379 -1.415344 0.000000 0 CHG=-1
M  V30 7 C 0.249886 -0.858607 0.000000 0
M  V30 8 C -1.232145 -0.766661 0.000000 0
M  V30 9 C -1.740121 -1.265073 0.000000 0
M  V30 10 C -0.580425 -1.662922 0.000000 0
M  V30 11 C 1.759743 0.755930 0.000000 0
M  V30 12 C 1.796429 -1.861329 0.000000 0
M  V30 13 Fe -0.554442 0.032137 0.000000 0 VAL=2
M  V30 14 * -0.601210 1.478619 0.000000 0
M  V30 15 * -0.537835 -1.172363 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 5
M  V30 2 2 4 5
M  V30 3 1 4 3
M  V30 4 2 2 3
M  V30 5 1 1 2
M  V30 6 1 6 10
M  V30 7 2 9 10
M  V30 8 1 9 8
M  V30 9 2 7 8
M  V30 10 1 6 7
M  V30 11 1 1 11
M  V30 12 1 6 12
M  V30 13 9 14 13 ENDPTS=(5 1 2 3 4 5) ATTACH=ANY
M  V30 14 9 15 13 ENDPTS=(5 9 10 7 8 6) ATTACH=ANY
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
  REQUIRE(m);
  {
    MolDraw2DSVG drawer(300, 300, 300, 300, false);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();

    auto extract_ends = [](const std::string &text, const std::regex &r,
                           std::vector<Point2D> &ends) -> void {
      auto match_begin = std::sregex_iterator(text.begin(), text.end(), r);
      auto match_end = std::sregex_iterator();
      for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
        std::smatch match = *i;
        ends.push_back(Point2D(std::stod(match[1]), std::stod(match[2])));
        ends.push_back(Point2D(std::stod(match[3]), std::stod(match[4])));
        ends.push_back(Point2D(std::stod(match[5]), std::stod(match[6])));
      }
    };
    std::regex head1(
        "atom-13 atom-12' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) Z'");
    std::vector<Point2D> ends1;
    extract_ends(text, head1, ends1);
    CHECK(ends1.size() == 3);

    std::regex head2(
        "atom-14 atom-12' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) Z'");
    std::vector<Point2D> ends2;
    extract_ends(text, head2, ends2);
    CHECK(ends2.size() == 3);

    auto h1s1 = (ends1[0] - ends1[1]).length();
    auto h2s1 = (ends2[0] - ends2[1]).length();
    // There's still a small difference in size of arrowhead because
    // it is done as a fraction of the overall arrow length and the dative
    // bonds in this ferrocene are of markedly different lengths.  The
    // lengths are in pixels, so the differences aren't huge.
    CHECK_THAT(h1s1, Catch::Matchers::WithinAbs(h2s1, 0.75));
    auto h1s2 = (ends1[0] - ends1[2]).length();
    auto h2s2 = (ends2[0] - ends2[2]).length();
    CHECK_THAT(h1s2, Catch::Matchers::WithinAbs(h2s2, 0.75));

    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE("Github5974: drawing code should not generate kekulization errors") {
  SECTION("basics") {
    SmilesParserParams ps;
    ps.sanitize = false;
    std::unique_ptr<RWMol> mol(SmilesToMol("c1nccc1", ps));
    REQUIRE(mol);
    mol->updatePropertyCache();
    MolDraw2DSVG drawer(300, 300, -1, -1, false);
    // the test here is really just that calling drawMolecule() doesn't throw an
    // exception
    drawer.drawMolecule(*mol);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs("test_github5974.svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash("test_github5974.svg");
  }
}

TEST_CASE("Github5963: bond end wrong on wedge") {
  std::string nameBase = "test_github5963";
  {
    auto m = "COc1ccc([S@@](=O)Cc2ccccc2)cc1"_smiles;
    MolDraw2DSVG drawer(300, 300, 300, 300, true);
    RDDepict::compute2DCoords(*m);
    drawer.drawOptions().addBondIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();
    // There are 2 paths to draw bond 7, a yellow triangle and a black
    // quadrilateral.
    std::regex bond71(
        "'bond-7 atom-6 atom-8' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) Z'");
    std::ptrdiff_t const match_count1(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond71),
                      std::sregex_iterator()));
    CHECK(match_count1 == 1);
    std::regex bond72(
        "'bond-7 atom-6 atom-8' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) Z'");
    std::ptrdiff_t const match_count2(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond72),
                      std::sregex_iterator()));
    CHECK(match_count2 == 1);
    auto bond72_match = std::sregex_iterator(text.begin(), text.end(), bond72);
    std::smatch match72 = *bond72_match;
    std::regex bond8(
        "'bond-8 atom-8 atom-9' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)'");
    // only 1 bond8 match
    auto bond8_match = std::sregex_iterator(text.begin(), text.end(), bond8);
    std::smatch match8 = *bond8_match;
    // the start of the quadrilateral should be the same as the start of the
    // line
    Point2D startquad(std::stod(match72[1]), std::stod(match72[2]));
    Point2D startline(std::stod(match8[1]), std::stod(match8[2]));
    CHECK_THAT((startquad - startline).length(),
               Catch::Matchers::WithinAbs(0.0, 0.1));
    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE("Github6025: bad bonds on tiny canvas") {
  std::string nameBase = "test_github6025";
  auto m1 = R"CTAB(
  -ISIS-  02031614092D

 35 39  0  0  0  0  0  0  0  0999 V2000
    9.1292    9.8417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.6292    9.8417    0.0000 N   0  0  3  0  0  0  0  0  0  0  0  0
    8.3792    8.5417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   10.6292    4.6417    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   11.3792    3.3583    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.3792    5.9417    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   10.6292    2.0500    0.0000 N   0  0  3  0  0  0  0  0  0  0  0  0
    6.8792    8.5417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.1292    7.2417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.3792    8.5417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.3792    5.9417    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    4.6292    7.2417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.3792   11.1417    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    2.3792    8.5417    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    2.3792    5.9417    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    9.1292    2.0500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.8792    3.3583    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.6292    7.2417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.8792    5.9417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    9.1292    7.2417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.8792    8.5417    0.0000 C   0  0  3  0  0  0  0  0  0  0  0  0
   13.6292    7.2417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.3792   11.1417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.8792    5.9417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.6292    4.6417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.8792    8.5417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.8792    5.9417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   11.3792    0.7500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   12.8792   11.1417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   13.6292    9.8417    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.3792    0.7500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.3792    3.3583    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.8792    3.3583    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.8792    0.7500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.1292    2.0500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  2  1  1  0  0  0  0
  3  1  1  0  0  0  0
  4  6  1  0  0  0  0
  5 17  1  0  0  0  0
  6 19  2  0  0  0  0
  7  5  1  0  0  0  0
  8  3  1  0  0  0  0
  9  8  2  0  0  0  0
 10  2  1  0  0  0  0
 11 20  1  0  0  0  0
 12  9  1  0  0  0  0
 13  1  2  0  0  0  0
 14 26  2  0  0  0  0
 15 27  1  0  0  0  0
 16  7  1  0  0  0  0
 17 25  2  0  0  0  0
 18 15  2  0  0  0  0
 19 22  1  0  0  0  0
 20  3  2  0  0  0  0
 21 10  1  0  0  0  0
 22 21  1  0  0  0  0
 23  2  1  0  0  0  0
 24 11  2  0  0  0  0
 25 19  1  0  0  0  0
 26 12  1  0  0  0  0
 27 12  2  0  0  0  0
 28  7  1  0  0  0  0
 29 23  1  0  0  0  0
 30 29  1  0  0  0  0
 31 16  2  0  0  0  0
 32 16  1  0  0  0  0
 33 32  2  0  0  0  0
 34 31  1  0  0  0  0
 35 33  1  0  0  0  0
 24  9  1  0  0  0  0
 30 21  1  0  0  0  0
 18 14  1  0  0  0  0
  5  4  2  0  0  0  0
 34 35  2  0  0  0  0
M  END
)CTAB"_ctab;

  REQUIRE(m1);
  {
    MolDraw2DSVG drawer(25, 25, 25, 25, false);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();

    auto check_bond = [](const std::string &text, const std::regex &r,
                         int matches) {
      // there should be 4 matches for each regex, and all the x coords should
      // be > 0.0. The bug manifested itself by some of them being < 0.0 and
      // thus off the side of the picture.
      std::ptrdiff_t const match_count(
          std::distance(std::sregex_iterator(text.begin(), text.end(), r),
                        std::sregex_iterator()));
      CHECK(match_count == matches);
      auto match_begin = std::sregex_iterator(text.begin(), text.end(), r);
      auto match_end = std::sregex_iterator();
      for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
        std::smatch match = *i;
        CHECK(stod(match[1]) > 0.0);
        CHECK(stod(match[3]) > 0.0);
      }
    };
    std::regex bond9(
        "'bond-9 atom-10 atom-19' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::regex bond16(
        "'bond-16 atom-17 atom-14' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    check_bond(text, bond9, 4);
    check_bond(text, bond16, 2);
    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE("Github6027: bad bonds with co-linear double bond") {
  std::string nameBase = "test_github6027";
  auto m1 = R"CTAB(
  MJ201100

 15 16  0  0  0  0  0  0  0  0999 V2000
   -2.6052   -0.0931    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6052    0.7318    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3197    1.1444    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0346    0.7318    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0347   -0.0931    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3197   -0.5055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3197    1.9693    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.3197    2.7943    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.8908   -0.5055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.1764    0.7318    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.1764   -0.0931    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4620   -0.5055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2523   -0.0931    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.2524    0.7318    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.4620    1.1444    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  5  6  1  0  0  0  0
  6  1  1  0  0  0  0
  3  7  1  0  0  0  0
  7  8  2  0  0  0  0
 13 14  1  0  0  0  0
 14 15  1  0  0  0  0
 10 11  1  0  0  0  0
 15 10  1  0  0  0  0
 11 12  1  0  0  0  0
 12 13  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  9  1  1  0  0  0  0
 11  9  1  0  0  0  0
M  END
)CTAB"_ctab;

  REQUIRE(m1);
  {
    MolDraw2DSVG drawer(250, 250, 250, 250, false);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + "_1.svg");
    outs << text;
    outs.flush();
    outs.close();

    std::regex bond5(
        "'bond-5 atom-6 atom-7' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    // There are 2 bonds, and the x coords of their 2 ends should be
    // the same, because the offending bond is exactly vertical, and their
    // corresponding y coords should be the same.  The bug
    // manifested itself by giving the 2nd line coords
    // M 210.3,169.3 L 63.6,41.0.
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond5),
                      std::sregex_iterator()));
    CHECK(match_count == 2);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond5);
    auto match_end = std::sregex_iterator();
    std::vector<float> ys;
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      ys.push_back(stod(match[2]));
      ys.push_back(stod(match[4]));
      CHECK(match[1] == match[3]);
    }
    CHECK(ys[0] == ys[2]);
    CHECK(ys[1] == ys[3]);
    check_file_hash(nameBase + "_1.svg");
  }
  {
    // make sure the double bond lines are still parallel when rotated
    // (they weren't, the first time.)
    MolDraw2DSVG drawer(250, 250, 250, 250, false);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().rotate = 120;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + "_2.svg");
    outs << text;
    outs.flush();
    outs.close();

    // check that the two lines are parallel.
    std::regex bond5(
        "'bond-5 atom-6 atom-7' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond5),
                      std::sregex_iterator()));
    CHECK(match_count == 2);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond5);
    auto match_end = std::sregex_iterator();
    std::vector<Point2D> points;
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      points.push_back(Point2D(stod(match[4]), stod(match[2])));
      points.push_back(Point2D(stod(match[3]), stod(match[4])));
    }
    auto vec1 = points[0].directionVector(points[1]);
    auto vec2 = points[2].directionVector(points[3]);
    CHECK_THAT(vec1.dotProduct(vec2), Catch::Matchers::WithinAbs(1.0, 2.0e-4));
    check_file_hash(nameBase + "_2.svg");
  }
}

TEST_CASE("Down/dashed wedge not visible on small canvas..") {
  std::string nameBase = "test_github6041b";
  auto m =
      "CC(C)(F)c1noc(N2CCCN([C@H]3CC[C@H](COc4ccc(S(C)(=O)=O)cc4F)CC3)CC2)n1"_smiles;
  MolDraw2DSVG drawer(125, 125);
  RDDepict::compute2DCoords(*m);
  MolDraw2DUtils::setACS1996Options(drawer.drawOptions(), 1.5);
  drawer.drawOptions().fixedFontSize = -1;
  drawer.drawMolecule(*m);
  drawer.finishDrawing();
  std::string text = drawer.getDrawingText();
  std::ofstream outs(nameBase + ".svg");
  outs << text;
  outs.flush();
  outs.close();
  std::regex bond12(
      "'bond-12 atom-13 atom-12' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
      " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
  std::ptrdiff_t const match_count(
      std::distance(std::sregex_iterator(text.begin(), text.end(), bond12),
                    std::sregex_iterator()));
  CHECK(match_count == 3);
  check_file_hash(nameBase + ".svg");
}

TEST_CASE("Github6054: MDL query atoms should not trigger an exception") {
  SECTION("any heavy") {
    auto a = R"CTAB(
  MJ201100                      

  6  6  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 A   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
M  END
)CTAB"_ctab;

    REQUIRE(a);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*a));
    }
  }
}

TEST_CASE("Optionally depict complex query atoms in a more compact form") {
  std::string nameBase = "test_complex_query_atoms";
  auto extractQueryAtomSymbol = [](const std::string &text) {
    std::istringstream ss(text);
    std::string line;
    std::regex regex("^<text[^>]*>([^<])*</text>");
    std::smatch match;
    std::string res;
    while (std::getline(ss, line)) {
      if (std::regex_match(line, match, regex)) {
        CHECK(match.size() == 2);
        res += match[1];
      }
    }
    return res;
  };
  SECTION("any heavy") {
    auto a = R"CTAB(
  MJ201100                      

  6  6  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 A   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
M  END
)CTAB"_ctab;

    REQUIRE(a);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*a));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_1.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) == "![H]");
      check_file_hash(nameBase + "_1.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*a));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_2.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(a->getAtomWithIdx(a->getNumAtoms() - 1)->getQueryType() == "A");
      CHECK(extractQueryAtomSymbol(text) == "A");
      check_file_hash(nameBase + "_2.svg");
    }
  }
  SECTION("any atom") {
    auto ah = R"CTAB(
  MJ201100                      

  6  6  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 AH  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
M  END
)CTAB"_ctab;

    REQUIRE(ah);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*ah));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_3.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) == "*");
      check_file_hash(nameBase + "_3.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*ah));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_4.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(ah->getAtomWithIdx(ah->getNumAtoms() - 1)->getQueryType() == "AH");
      CHECK(extractQueryAtomSymbol(text) == "*");
      check_file_hash(nameBase + "_4.svg");
    }
  }
  SECTION("any hetero") {
    auto q = R"CTAB(
  MJ201100                      

  6  6  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 Q   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
M  END
)CTAB"_ctab;

    REQUIRE(q);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*q));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_5.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) == "![C,H]");
      check_file_hash(nameBase + "_5.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*q));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_6.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(q->getAtomWithIdx(q->getNumAtoms() - 1)->getQueryType() == "Q");
      CHECK(extractQueryAtomSymbol(text) == "Q");
      check_file_hash(nameBase + "_6.svg");
    }
  }
  SECTION("any hetero or hydrogen") {
    auto qh = R"CTAB(
  MJ201100                      

  6  6  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 QH  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
M  END
)CTAB"_ctab;

    REQUIRE(qh);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*qh));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_7.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) == "![C]");
      check_file_hash(nameBase + "_7.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*qh));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_8.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(qh->getAtomWithIdx(qh->getNumAtoms() - 1)->getQueryType() == "QH");
      CHECK(extractQueryAtomSymbol(text) == "QH");
      check_file_hash(nameBase + "_8.svg");
    }
  }
  SECTION("any halo") {
    auto x = R"CTAB(
  MJ201100                      

  7  7  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3344    0.8919    0.0000 X   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
M  END
  )CTAB"_ctab;

    REQUIRE(x);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*x));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_9.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) == "[F,Cl,Br,I,At]");
      check_file_hash(nameBase + "_9.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*x));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_10.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(x->getAtomWithIdx(x->getNumAtoms() - 1)->getQueryType() == "X");
      CHECK(extractQueryAtomSymbol(text) == "X");
      check_file_hash(nameBase + "_10.svg");
    }
  }
  SECTION("any halo or hydrogen") {
    auto xh = R"CTAB(
  MJ201100                      

  7  7  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3344    0.8919    0.0000 XH  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
M  END
  )CTAB"_ctab;

    REQUIRE(xh);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*xh));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_11.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) == "[F,Cl,Br,I,At,H]");
      check_file_hash(nameBase + "_11.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*xh));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_12.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(xh->getAtomWithIdx(xh->getNumAtoms() - 1)->getQueryType() == "XH");
      CHECK(extractQueryAtomSymbol(text) == "XH");
      check_file_hash(nameBase + "_12.svg");
    }
  }
  SECTION("any metal") {
    auto m = R"CTAB(
  MJ201100                      

  7  7  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3344    0.8919    0.0000 M   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
M  END
  )CTAB"_ctab;

    REQUIRE(m);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*m));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_13.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) ==
            "![*,He,B,C,N,O,F,Ne,Si,P,S,Cl,Ar,As,Se,Br,Kr,Te,I,Xe,At,Rn,H]");
      check_file_hash(nameBase + "_13.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*m));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_14.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(m->getAtomWithIdx(m->getNumAtoms() - 1)->getQueryType() == "M");
      CHECK(extractQueryAtomSymbol(text) == "M");
      check_file_hash(nameBase + "_14.svg");
    }
  }
  SECTION("any metal or hydrogen") {
    auto mh = R"CTAB(
  MJ201100                      

  7  7  0  0  0  0  0  0  0  0999 V2000
   -1.7633    0.8919    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4778   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7633   -0.7580    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488   -0.3456    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.0488    0.4794    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.3344    0.8919    0.0000 MH  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  1  0  0  0  0
  4  5  1  0  0  0  0
  1  6  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
M  END
  )CTAB"_ctab;

    REQUIRE(mh);
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      drawer.drawOptions().useComplexQueryAtomSymbols = false;
      REQUIRE_NOTHROW(drawer.drawMolecule(*mh));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_15.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(extractQueryAtomSymbol(text) ==
            "![*,He,B,C,N,O,F,Ne,Si,P,S,Cl,Ar,As,Se,Br,Kr,Te,I,Xe,At,Rn]");
      check_file_hash(nameBase + "_15.svg");
    }
    {
      MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
      REQUIRE_NOTHROW(drawer.drawMolecule(*mh));
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(nameBase + "_16.svg");
      outs << text;
      outs.flush();
      outs.close();
      CHECK(mh->getAtomWithIdx(mh->getNumAtoms() - 1)->getQueryType() == "MH");
      CHECK(extractQueryAtomSymbol(text) == "MH");
      check_file_hash(nameBase + "_16.svg");
    }
  }
}

TEST_CASE("ACS1996 mode crops small molecules - Github 6111") {
  std::string nameBase = "test_github6111";
  {
    auto m = "[*:1]N[*:2]"_smiles;
    RDDepict::compute2DCoords(*m);
    m->setProp<std::string>("_Name", "mol1");
    REQUIRE(m);
    MolDraw2DSVG drawer(-1, -1);
    MolDraw2DUtils::drawMolACS1996(drawer, *m, "", nullptr, nullptr);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + "_1.svg");
    outs << text;
    outs.flush();
    outs.close();

    // check that selected y coords don't go outside of the viewBox.
    std::regex vbox(R"(viewBox='(\d+)\s+(\d+)\s+(\d+)\s+(\d+)'>)");
    auto match1_begin = std::sregex_iterator(text.begin(), text.end(), vbox);
    std::smatch match = *match1_begin;
    auto ymin = std::stod(match[2]);
    auto ymax = std::stod(match[4]);

    std::regex atom0(R"(class='atom-\d+' d='M\s+(\d+\.\d+)\s+(\d+\.\d+))");
    auto match2_begin = std::sregex_iterator(text.begin(), text.end(), atom0);
    auto match2_end = std::sregex_iterator();
    for (std::sregex_iterator i = match2_begin; i != match2_end; ++i) {
      std::smatch match = *i;
      auto y = std::stod(match[2]);
      CHECK((y >= ymin && y <= ymax));
    }
    check_file_hash(nameBase + "_1.svg");
  }
}

TEST_CASE("ACS1996 should not throw exception with no coords - Github 6112") {
  std::string nameBase = "test_github6112";
  auto m = "C[C@H](I)CC(Cl)C[C@@H](F)C"_smiles;
  m->setProp<std::string>("_Name", "mol1");
  REQUIRE(m);
  MolDraw2DSVG drawer(-1, -1);
  MolDraw2DUtils::drawMolACS1996(drawer, *m, "Mol 1", nullptr, nullptr);
  drawer.finishDrawing();
  std::string text = drawer.getDrawingText();
  std::ofstream outs(nameBase + ".svg");
  outs << text;
  outs.flush();
  outs.close();
  check_file_hash(nameBase + ".svg");
}

TEST_CASE("Bad double bond - Github 6160") {
  std::string nameBase = "test_github6160";
  std::vector<std::string> smiles{"c1ccccc1NC=NCCS(=O)(=NC)N",
                                  "c1ccccc1NC=NCCS(=O)(=NCC(Cl)(F)C)N",
                                  "c1ccccc1NC=NCCS(=O)(=CCC(Cl)(F)C)N"};
  for (auto i = 0u; i < smiles.size(); ++i) {
    std::unique_ptr<ROMol> m(SmilesToMol(smiles[i]));
    m->setProp<std::string>("_Name", "mol" + std::to_string(i + 1));
    REQUIRE(m);
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    // it's a bit easier to deal with in BW.
    assignBWPalette(drawer.drawOptions().atomColourPalette);
    drawer.drawOptions().addBondIndices = true;
    drawer.drawOptions().addAtomIndices = true;
    MolDraw2DUtils::prepareAndDrawMolecule(drawer, *m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_" + std::to_string(i + 1) + ".svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();

    // check that the two lines for bond atom-11 atom-13 are parallel.
    std::regex bond5(
        "'bond-12 atom-11 atom-13' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond5),
                      std::sregex_iterator()));
    CHECK(match_count == 2);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond5);
    auto match_end = std::sregex_iterator();
    std::vector<Point2D> points;
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      points.push_back(Point2D(stod(match[1]), stod(match[2])));
      points.push_back(Point2D(stod(match[3]), stod(match[4])));
    }
    auto vec1 = points[0].directionVector(points[1]);
    auto vec2 = points[2].directionVector(points[3]);
    CHECK(vec1.dotProduct(vec2) == Catch::Approx(1.0).margin(1.0e-4));
    check_file_hash(svgName);
  }
}

TEST_CASE("No crossing for oddly drawn double bond - Github 6170") {
  std::string nameBase = "test_github6170";
  auto m = R"CTAB(
     RDKit          2D

  8  7  0  0  0  0  0  0  0  0999 V2000
    3.0428   -1.6819    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.0022    1.7243    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.8934   -1.6549    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    4.1949   -2.8653    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9237    1.6929    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    4.1521    2.9055    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6779   -1.6657    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6267    1.6960    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  1  3  2  3
  1  4  1  0
  2  5  2  3
  2  6  1  0
  3  7  1  0
  5  8  1  0
M  END
  )CTAB"_ctab;

  auto doBondsIntersect = [](const std::string &text,
                             const std::regex &bond) -> void {
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond),
                      std::sregex_iterator()));
    CHECK(match_count == 2);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond);
    auto match_end = std::sregex_iterator();
    std::vector<Point2D> points;
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      points.push_back(Point2D(stod(match[1]), stod(match[2])));
      points.push_back(Point2D(stod(match[3]), stod(match[4])));
    }
    CHECK(MolDraw2D_detail::doLinesIntersect(points[0], points[1], points[2],
                                             points[3], nullptr));
  };

  REQUIRE(m);
  {
    MolDraw2DSVG drawer(250, 250, -1, -1, NO_FREETYPE);
    // it's a bit easier to deal with in BW.
    assignBWPalette(drawer.drawOptions().atomColourPalette);
    drawer.drawOptions().addAtomIndices = true;
    REQUIRE_NOTHROW(drawer.drawMolecule(*m));
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();
    // check that the two lines for both double bonds intersect.
    std::regex bond1(
        "'bond-1 atom-0 atom-2' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    doBondsIntersect(text, bond1);
    std::regex bond3(
        "'bond-3 atom-1 atom-4' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    doBondsIntersect(text, bond3);
    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE("getMolSize()") {
  std::string nameBase = "test_getMolSize";
  auto mol = "Oc1ccc(C(=O)O)cc1"_smiles;
  REQUIRE(mol);
  SECTION("basics") {
    MolDraw2DSVG drawer(-1, -1);
    drawer.drawMolecule(*mol);
    auto dims = std::make_pair(drawer.width(), drawer.height());
    CHECK(dims == drawer.getMolSize(*mol));
  }
  SECTION("calculate size pre-drawing") {
    MolDraw2DSVG drawer(-1, -1);
    auto sz = drawer.getMolSize(*mol);
    drawer.drawMolecule(*mol);
    auto dims = std::make_pair(drawer.width(), drawer.height());
    CHECK(dims == sz);
    CHECK(dims == drawer.getMolSize(*mol));
  }

  SECTION("drawing with it") {
    MolDraw2DSVG drawer(1000, 1000, -1, -1, true);
    drawer.setFlexiMode(true);
    drawer.clearDrawing();
    drawer.drawOptions().clearBackground = false;
    auto dims = drawer.getMolSize(*mol, "m1");
    drawer.setOffset(500 - dims.first / 2, 500 - dims.second / 2);
    drawer.drawMolecule(*mol, "m1");

    auto dims2 = drawer.getMolSize(*mol, "m2");
    CHECK(dims == dims2);
    drawer.setOffset(500 - dims2.first / 2 + 100, 300 + dims2.second);
    drawer.drawMolecule(*mol, "m2");

    drawer.setOffset(500 - dims2.first / 2 - 200, 700 + dims2.second);
    drawer.drawMolecule(*mol, "m3");

    drawer.setOffset(500 - dims2.first / 2 - 400, 500 + dims2.second / 2);
    drawer.drawMolecule(*mol, "m4");

    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(nameBase + ".svg");
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash(nameBase + ".svg");
  }
}

TEST_CASE(
    "Filled circles in multi-coloured highlights with very large circles - Github 6200") {
  std::string nameBase = "test_github6200";

  auto testArcs = [](const std::string &text, const std::regex &atomLine,
                     int numArcs, double arcLength) -> void {
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), atomLine),
                      std::sregex_iterator()));
    CHECK(match_count == numArcs);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), atomLine);
    auto match_end = std::sregex_iterator();
    // Check that the lengths of the lines in the arc are the correct size.
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      auto p1 = Point2D(stod(match[1]), stod(match[2]));
      auto p2 = Point2D(stod(match[3]), stod(match[4]));
      auto p3 = Point2D(stod(match[5]), stod(match[6]));
      CHECK_THAT((p1 - p2).length(),
                 Catch::Matchers::WithinAbs(arcLength, 0.1));
      CHECK_THAT((p2 - p3).length(),
                 Catch::Matchers::WithinAbs(arcLength, 0.1));
    }
  };
  {
    auto m = "N#CC(C#N)=C1C(=O)c2cccc3cccc1c23"_smiles;
    REQUIRE(m);

    std::vector<DrawColour> colours = {
        DrawColour(0.8, 0.0, 0.8), DrawColour(0.8, 0.8, 0.0),
        DrawColour(0.0, 0.8, 0.8), DrawColour(0.0, 0.0, 0.8)};

    auto rings = m->getRingInfo();
    auto &atomRings = rings->atomRings();
    std::map<int, std::vector<DrawColour>> atomCols;
    std::map<int, double> atomRads;
    for (auto i = 0u; i < atomRings.size(); ++i) {
      for (auto j = 0u; j < atomRings[i].size(); ++j) {
        auto ex = atomCols.find(atomRings[i][j]);
        if (ex == atomCols.end()) {
          std::vector<DrawColour> cvec(1, colours[i]);
          atomCols.insert(std::make_pair(atomRings[i][j], cvec));
        } else {
          if (ex->second.end() ==
              find(ex->second.begin(), ex->second.end(), colours[i])) {
            ex->second.push_back(colours[i]);
          }
        }
        atomRads[atomRings[i][j]] = 0.35;
      }
    }

    auto &bondRings = rings->bondRings();
    std::map<int, int> bondMults;
    std::map<int, std::vector<DrawColour>> bondCols;
    for (auto i = 0u; i < bondRings.size(); ++i) {
      for (auto j = 0u; j < bondRings[i].size(); ++j) {
        auto ex = bondCols.find(bondRings[i][j]);
        if (ex == bondCols.end()) {
          std::vector<DrawColour> cvec(1, colours[i]);
          bondCols.insert(std::make_pair(bondRings[i][j], cvec));
        } else {
          if (ex->second.end() ==
              find(ex->second.begin(), ex->second.end(), colours[i])) {
            ex->second.push_back(colours[i]);
          }
        }
      }
    }
    {
      MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
      drawer.drawOptions().fillHighlights = true;
      drawer.drawMoleculeWithHighlights(*m, "Test 1", atomCols, bondCols,
                                        atomRads, bondMults);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::string svgName = nameBase + "_1.svg";
      std::ofstream outs(svgName);
      outs << text;
      outs.flush();
      outs.close();
      std::regex atom17(
          "class='atom-17' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
          " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
      // there are 3 arcs on atom-17, for a 3 colour highlight.
      testArcs(text, atom17, 3, 0.85);
    }
    check_file_hash(nameBase + "_1.svg");
  }

  {
    // Check that #6194 is the same issue and also fixed.
    auto m = "CCC"_smiles;
    REQUIRE(m);

    std::vector<DrawColour> colours = {DrawColour(0.8, 0.0, 0.8),
                                       DrawColour(0.8, 0.8, 0.0)};
    std::map<int, std::vector<DrawColour>> atomCols;
    atomCols.insert(std::make_pair(0, std::vector<DrawColour>{colours[0]}));
    atomCols.insert(std::make_pair(1, std::vector<DrawColour>{colours[0]}));
    atomCols.insert(
        std::make_pair(2, std::vector<DrawColour>{colours[0], colours[1]}));
    std::map<int, double> atomRads;
    std::map<int, int> bondMults;
    std::map<int, std::vector<DrawColour>> bondCols;

    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().fillHighlights = true;
    drawer.drawMoleculeWithHighlights(*m, "Test 1", atomCols, bondCols,
                                      atomRads, bondMults);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_2.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    std::regex atom2(
        "class='atom-2' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+) L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    // there are 2 arcs on atom-2, for a 2 colour highlight.
    testArcs(text, atom2, 2, 2.15);
    check_file_hash(nameBase + "_2.svg");
  }
}

TEST_CASE("queryColour can be set to a non-default value") {
  std::string nameBase = "test_queryColour";
  auto m = "c1ccc2nc([*:1])nc([*:2])c2c1"_smarts;
  REQUIRE(m);

  {
    // Check that default queryColour is #7F7F7F.
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_1.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    CHECK(text.find("#7F7F7F") != std::string::npos);
    check_file_hash(nameBase + "_1.svg");
  }
  {
    // Check that queryColour can be set to black.
    DrawColour queryColour(0.0, 0.0, 0.0);
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().queryColour = queryColour;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_2.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    CHECK(text.find("#7F7F7F") == std::string::npos);
    check_file_hash(nameBase + "_2.svg");
  }
}

TEST_CASE(
    "Github #6336: calling drawing commands before drawing a molecule with MolDraw2DCairo") {
  std::string nameBase = "github6336";
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("cairo") {
    MolDraw2DCairo drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.setColour(DrawColour(1, 0, 1));
    drawer.drawRect(Point2D(10, 10), Point2D(150, 150), true);
    drawer.setColour(DrawColour(0, 1, 1));
    drawer.drawLine(Point2D(150, 150), Point2D(250, 299), true);
    drawer.finishDrawing();
    drawer.writeDrawingText(nameBase + "_1.png");
    check_file_hash(nameBase + "_1.png");
  }
#endif
  SECTION("SVG") {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.setColour(DrawColour(1, 0, 1));
    drawer.drawRect(Point2D(10, 10), Point2D(150, 150), true);
    drawer.setColour(DrawColour(0, 1, 1));
    drawer.drawLine(Point2D(150, 150), Point2D(250, 299), true);
    drawer.finishDrawing();
    std::ofstream outs(nameBase + "_1.svg");
    outs << drawer.getDrawingText();
    outs.flush();
    outs.close();
    check_file_hash(nameBase + "_1.svg");
  }
}

TEST_CASE("Github #6416: crash with colinear atoms") {
  std::string name = "github6416.svg";
  auto m = R"CTAB(168010013
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 35 36 0 0 1
M  V30 BEGIN ATOM
M  V30 1 F 11.000000 -1.318000 0.000000 0
M  V30 2 F 12.000000 -2.318000 0.000000 0
M  V30 3 F 11.000000 -3.318000 0.000000 0
M  V30 4 O 6.207100 2.719200 0.000000 0
M  V30 5 O 6.500000 0.280000 0.000000 0
M  V30 6 O 6.500000 -1.452000 0.000000 0
M  V30 7 N 8.000000 -0.586000 0.000000 0
M  V30 8 C 3.500000 2.012100 0.000000 0
M  V30 9 C 4.000000 1.146000 0.000000 0
M  V30 10 C 2.500000 2.012100 0.000000 0
M  V30 11 C 5.500000 2.012100 0.000000 0
M  V30 12 C 4.000000 2.878100 0.000000 0
M  V30 13 C 2.000000 1.146000 0.000000 0
M  V30 14 C 5.000000 1.146000 0.000000 0
M  V30 15 C 5.000000 2.878100 0.000000 0
M  V30 16 C 4.500000 2.012100 0.000000 0
M  V30 17 C 3.000000 1.146000 0.000000 0
M  V30 18 C 5.500000 0.280000 0.000000 0
M  V30 19 C 2.500000 0.280000 0.000000 0
M  V30 20 C 6.465900 1.753200 0.000000 0
M  V30 21 C 5.000000 -0.586000 0.000000 0
M  V30 22 C 2.500000 -1.452000 0.000000 0
M  V30 23 C 3.500000 -1.452000 0.000000 0
M  V30 24 C 2.000000 -0.586000 0.000000 0
M  V30 25 C 4.000000 -0.586000 0.000000 0
M  V30 26 C 3.500000 0.280000 0.000000 0
M  V30 27 C 3.000000 -0.586000 0.000000 0
M  V30 28 C 7.000000 -0.586000 0.000000 0
M  V30 29 C 8.500000 -1.452000 0.000000 0
M  V30 30 C 9.500000 -1.452000 0.000000 0
M  V30 31 C 8.000000 -2.318000 0.000000 0
M  V30 32 C 10.000000 -2.318000 0.000000 0
M  V30 33 C 8.500000 -3.184100 0.000000 0
M  V30 34 C 9.500000 -3.184100 0.000000 0
M  V30 35 C 11.000000 -2.318000 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 35
M  V30 2 1 2 35
M  V30 3 1 3 35
M  V30 4 1 4 11
M  V30 5 1 5 18
M  V30 6 1 5 28
M  V30 7 2 6 28
M  V30 8 1 7 28
M  V30 9 1 7 29
M  V30 10 1 8 9
M  V30 11 1 8 10
M  V30 12 1 8 12
M  V30 13 1 9 16
M  V30 14 1 9 17
M  V30 15 1 10 13
M  V30 16 1 11 14
M  V30 17 1 11 15
M  V30 18 1 11 20
M  V30 19 2 12 15 CFG=2
M  V30 20 1 13 19
M  V30 21 1 14 18
M  V30 22 1 18 21
M  V30 23 2 19 24 CFG=2
M  V30 24 1 19 26
M  V30 25 2 21 25 CFG=2
M  V30 26 1 22 23
M  V30 27 1 22 24
M  V30 28 1 23 25
M  V30 29 1 25 27
M  V30 30 2 29 30
M  V30 31 1 29 31
M  V30 32 1 30 32
M  V30 33 2 31 33
M  V30 34 2 32 34
M  V30 35 1 32 35
M  V30 36 1 33 34
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
  REQUIRE(m);
  MolDraw2DSVG drawer(300, 300, -1, -1);
  drawer.drawMolecule(*m);
  drawer.finishDrawing();
  std::ofstream outs(name);
  outs << drawer.getDrawingText();
  outs.flush();
  outs.close();
  check_file_hash(name);
}

TEST_CASE("Github 6397 - chiral tag overlapping atom label") {
  const static std::regex absA(
      "<text x='(\\d+\\.\\d+)' y='(\\d+\\.\\d+)' class='note'.*>A</text>");
  auto checkABS = [](const std::string &text, int expCount, double expX,
                     double expY) {
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), absA),
                      std::sregex_iterator()));
    CHECK(match_count == expCount);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), absA);
    std::smatch match = *match_begin;
    double x = stod(match[1]);
    CHECK_THAT(x, Catch::Matchers::WithinAbs(expX, 0.1));
    double y = stod(match[2]);
    CHECK_THAT(y, Catch::Matchers::WithinAbs(expY, 0.1));
  };
  std::string nameBase = "test_github6397";
  auto m1 = R"CTAB(
     RDKit          2D

  9  9  0  0  1  0  0  0  0  0999 V2000
    2.3094   -1.6667    0.0000 F   0  0  0  0  0  0  0  0  0  0  0  0
    1.0104   -0.9167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2887   -1.6667    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5877   -0.9167    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5877    0.5833    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8868    1.3333    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.2887    1.3333    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.0104    0.5833    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.3094    1.3333    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  3  4  1  0
  4  5  1  0
  5  6  1  1
  5  7  1  0
  7  8  1  0
  8  9  1  6
  8  2  1  0
M  END)CTAB"_ctab;
  REQUIRE(m1);
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().includeChiralFlagLabel = true;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_1.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();

    checkABS(text, 1, 239.5, 34.5);
    check_file_hash(svgName);
  }

  auto m2 = R"CTAB(ACS Document 1996
  ChemDraw06062309122D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 10 10 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C -0.714471 0.000000 0.000000 0
M  V30 2 C -0.714471 -0.825000 0.000000 0
M  V30 3 C 0.000000 -1.237500 0.000000 0
M  V30 4 C 0.714472 -0.825000 0.000000 0
M  V30 5 C 0.714472 0.000000 0.000000 0
M  V30 6 C 0.000000 0.412500 0.000000 0
M  V30 7 C 1.428942 0.412500 0.000000 0
M  V30 8 Cl 1.428942 1.237500 0.000000 0
M  V30 9 O -1.428942 0.412500 0.000000 0
M  V30 10 F -1.428942 -1.237500 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 1 4 5
M  V30 5 1 5 6
M  V30 6 1 6 1
M  V30 7 1 5 7 CFG=1
M  V30 8 1 7 8
M  V30 9 1 1 9 CFG=1
M  V30 10 1 2 10 CFG=1
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEABS ATOMS=(3 1 2 5)
M  V30 END COLLECTION
M  V30 END CTAB
M  END)CTAB"_ctab;
  REQUIRE(m2);
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().includeChiralFlagLabel = true;
    drawer.drawMolecule(*m2, "Important legend");
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_2.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    checkABS(text, 1, 0.0, 52.0);
    check_file_hash(svgName);
  }
  auto m3 = R"CTAB(ACS Document 1996
  ChemDraw06062312152D

  0  0  0     0  0              0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 12 12 0 0 1
M  V30 BEGIN ATOM
M  V30 1 C -0.714471 0.412500 0.000000 0
M  V30 2 C -0.714471 -0.412500 0.000000 0
M  V30 3 C 0.000000 -0.825000 0.000000 0
M  V30 4 C 0.714472 -0.412500 0.000000 0
M  V30 5 C 0.714472 0.412500 0.000000 0
M  V30 6 C 0.000000 0.825000 0.000000 0
M  V30 7 C 1.428942 0.825000 0.000000 0
M  V30 8 C -1.428942 0.825000 0.000000 0
M  V30 9 C 1.428942 -0.825000 0.000000 0
M  V30 10 C 1.428942 1.650000 0.000000 0
M  V30 11 O -1.428942 1.650000 0.000000 0
M  V30 12 I 1.428942 -1.650000 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 1 4 5
M  V30 5 1 5 6
M  V30 6 1 6 1
M  V30 7 1 5 7 CFG=1
M  V30 8 1 1 8 CFG=1
M  V30 9 1 4 9 CFG=1
M  V30 10 1 7 10
M  V30 11 1 8 11
M  V30 12 1 9 12
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEABS ATOMS=(3 1 4 5)
M  V30 END COLLECTION
M  V30 END CTAB
M  END)CTAB"_ctab;
  REQUIRE(m3);
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().includeChiralFlagLabel = true;
    drawer.drawMolecule(*m3, "Important legend");
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_3.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    checkABS(text, 1, 0.0, 258.3);
    check_file_hash(svgName);
  }

  {
    // make sure the ABS follows the molecule.
    MolDraw2DSVG drawer(500, 400, 250, 200, NO_FREETYPE);
    drawer.drawOptions().includeChiralFlagLabel = true;
    drawer.drawMolecule(*m1, "m1");
    drawer.setOffset(250, 0);
    drawer.drawMolecule(*m2, "m2");
    drawer.setOffset(0, 200);
    drawer.drawMolecule(*m3, "m3");
    drawer.setOffset(250, 200);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_4.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    checkABS(text, 3, 0.0, 173.3);
    text = std::regex_replace(text, absA, "",
                              std::regex_constants::format_first_only);
    checkABS(text, 2, 250.0, 42.8);
    text = std::regex_replace(text, absA, "",
                              std::regex_constants::format_first_only);
    checkABS(text, 1, 191.4, 233.4);
    check_file_hash(svgName);
  }
  {
    // Visual check to make sure it works in Freetype mode as well.
    MolDraw2DSVG drawer(500, 400, 250, 200);
    drawer.drawOptions().includeChiralFlagLabel = true;
    drawer.drawMolecule(*m1, "m1");
    drawer.setOffset(250, 0);
    drawer.drawMolecule(*m2, "m2");
    drawer.setOffset(0, 200);
    drawer.drawMolecule(*m3, "m3");
    drawer.setOffset(250, 200);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::string svgName = nameBase + "_5.svg";
    std::ofstream outs(svgName);
    outs << text;
    outs.flush();
    outs.close();
    check_file_hash(svgName);
  }
}

TEST_CASE("Github #6400: extra padding, no legend apparent") {
  std::string nameBase = "test_github6400";
  auto m = "CCCOC"_smiles;
  REQUIRE(m);
  MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
  drawer.drawOptions().padding = 0.2;
  drawer.drawMolecule(*m, "Legendary Big Padding");
  drawer.finishDrawing();
  std::ofstream outs(nameBase + "_1.svg");
  auto text = drawer.getDrawingText();
  // The original bug manifested itself with a font size of 0 for the
  // legend.  Fixed, it comes out at 16.
  CHECK(text.find("font-size:0px") == std::string::npos);
  REQUIRE(text.find("font-size:16px") != std::string::npos);

  outs << text;
  outs.flush();
  outs.close();
  check_file_hash(nameBase + "_1.svg");
}

TEST_CASE("Github #6504: double bonds not drawn correctly for sulfoximines") {
  std::string baseName = "github6504";
  auto m1 = R"CTAB(
     RDKit          2D

  7  6  0  0  0  0  0  0  0  0999 V2000
   -3.3489   -2.7067    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.0093   -3.4808    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6698   -2.7067    0.0000 S   0  0  0  0  0  0  0  0  0  0  0  0
    0.6696   -3.4792    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6698   -1.1601    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6696   -0.3864    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6698   -4.2536    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  2  0
  3  4  2  0
  3  5  1  0
  5  6  1  0
  3  7  1  1
M  END
)CTAB"_ctab;
  // The bug report showed different manifestations of the problem
  // using the given coords and those generated from scratch.
  REQUIRE(m1);
  std::unique_ptr<RDKit::ROMol> m2(new RDKit::ROMol(*m1));
  RDDepict::compute2DCoords(*m2);

  // The test, in both cases, is that the 2 ends of the lines
  // making bond 1 are separated by a small distance.  It's a two
  // colour line, so the relevant points are 0,4 and 3,7.
  auto checkEndSep = [](const std::string &text) {
    std::regex bond5(
        "'bond-1 atom-1 atom-2' d='M\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)"
        " L\\s+(\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), bond5),
                      std::sregex_iterator()));
    CHECK(match_count == 4);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond5);
    auto match_end = std::sregex_iterator();
    std::vector<Point2D> points;
    for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
      std::smatch match = *i;
      points.push_back(Point2D(stod(match[1]), stod(match[2])));
      points.push_back(Point2D(stod(match[3]), stod(match[4])));
    }
    auto d1 = (points[0] - points[4]).length();
    auto d2 = (points[3] - points[7]).length();
    // the distances should be > 10 and roughly equal.  They are
    // 12 and 14 pixels apart in the two molecules.
    CHECK(d1 > 10.0);
    CHECK(d2 > 10.0);
    CHECK_THAT(fabs(d1 - d2), Catch::Matchers::WithinAbs(0.0, 0.1));
  };

  {
    MolDraw2DSVG drawer(300, 300, -1, -1);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m1);
    drawer.finishDrawing();
    std::ofstream outs(baseName + "_1.svg");
    std::string text = drawer.getDrawingText();
    outs << text;
    outs.flush();
    outs.close();
    checkEndSep(text);
    check_file_hash(baseName + "_1.svg");
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m2);
    drawer.finishDrawing();
    std::ofstream outs(baseName + "_2.svg");
    std::string text = drawer.getDrawingText();
    outs << text;
    outs.flush();
    outs.close();
    checkEndSep(text);
    check_file_hash(baseName + "_2.svg");
  }
}

TEST_CASE("Github #6569: placement of bond labels bad when atoms overlap") {
  std::string baseName = "github6569";
  auto m = R"CTAB(CHEMBL3612237
     RDKit          2D

 14 15  0  0  0  0  0  0  0  0999 V2000
   -0.6828   -1.6239    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6828    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6090    0.5905    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9007    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9007   -1.6239    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6090   -2.3805    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9007    1.3471    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6828    1.3471    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.6090    2.0668    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6319    1.4849    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.5072    2.6784    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -1.7280    0.9964    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.6828    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.9007    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  1  6  1  0
  2  3  1  0
  3  4  1  0
  4  5  1  0
  5  6  1  0
  4  7  1  0
  2  8  1  0
  8  9  1  0
  7  9  1  0
  3 10  1  1
 10 11  1  0
 10 12  2  0
  2 13  1  1
  4 14  1  1
M  END
)CTAB"_ctab;
  REQUIRE(m);
  {
    MolDraw2DSVG drawer(300, 300, -1, -1);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::ofstream outs(baseName + "_1.svg");
    std::string text = drawer.getDrawingText();
    outs << text;
    outs.flush();
    outs.close();
    // All the coords came out as nan in the buggy version
    CHECK(text.find("nan") == std::string::npos);
    check_file_hash(baseName + "_1.svg");
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1);
    drawer.drawOptions().addBondIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    std::ofstream outs(baseName + "_2.svg");
    std::string text = drawer.getDrawingText();
    outs << text;
    outs.flush();
    outs.close();
    // All the coords came out as nan in the buggy version
    CHECK(text.find("nan") == std::string::npos);
    check_file_hash(baseName + "_2.svg");
  }
}

TEST_CASE("Lasso highlights") {
  std::string baseName = "lasso_highlights_";
  auto get_all_hit_atoms = [](ROMol &mol,
                              const std::string &smt) -> std::vector<int> {
    std::vector<int> hit_atoms;
    RWMol *query = SmartsToMol(smt);
    std::vector<MatchVectType> hits_vect;
    SubstructMatch(mol, *query, hits_vect);
    for (size_t i = 0; i < hits_vect.size(); ++i) {
      for (size_t j = 0; j < hits_vect[i].size(); ++j) {
        hit_atoms.push_back(hits_vect[i][j].second);
      }
    }
    delete query;
    return hit_atoms;
  };
  auto update_colour_map = [](const std::vector<int> &ats, DrawColour col,
                              std::map<int, std::vector<DrawColour>> &ha_map) {
    for (auto h : ats) {
      auto ex = ha_map.find(h);
      if (ex == ha_map.end()) {
        std::vector<DrawColour> cvec(1, col);
        ha_map.insert(make_pair(h, cvec));
      } else {
        if (ex->second.end() ==
            find(ex->second.begin(), ex->second.end(), col)) {
          ex->second.push_back(col);
        }
      }
    }
  };
  std::map<int, double> h_rads;
  std::map<int, int> h_lw_mult;
  {
    std::string smiles = "CO[C@@H](O)C1=C(O[C@H](F)Cl)C(C#N)=C1ONNC[NH3+]";
    std::unique_ptr<ROMol> m(SmilesToMol(smiles));
    RDDepict::compute2DCoords(*m);

    std::vector<std::string> smarts = {"CONN", "N#CC~CO", "C=CON", "CONNCN"};
    std::vector<DrawColour> colours = {
        DrawColour(1.0, 0.0, 0.0), DrawColour(0.0, 1.0, 0.0),
        DrawColour(0.0, 0.0, 1.0), DrawColour(1.0, 0.55, 0.0)};
    std::map<int, std::vector<DrawColour>> ha_map;
    std::map<int, std::vector<DrawColour>> hb_map;

    for (size_t i = 0; i < smarts.size(); ++i) {
      std::vector<int> hit_atoms = get_all_hit_atoms(*m, smarts[i]);
      update_colour_map(hit_atoms, colours[i], ha_map);
    }
    MolDraw2DSVG drawer(500, 500);
    drawer.drawOptions().multiColourHighlightStyle =
        RDKit::MultiColourHighlightStyle::LASSO;
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMoleculeWithHighlights(*m, "Lasso 1", ha_map, hb_map, h_rads,
                                      h_lw_mult);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(baseName + "1.svg");
    outs << text;
    outs.flush();
    outs.close();
    // atom 16 should have 1 red arc
    std::regex a16(
        "<path class='atom-16' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+).*stroke:#FF0000;");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), a16),
                      std::sregex_iterator()));
    CHECK(match_count == 1);
    auto a16reg = std::sregex_iterator(text.begin(), text.end(), a16);
    auto dat1 = *a16reg;
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(221.5, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(323.8, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(222.5, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(325.0, 0.1));
    check_file_hash(baseName + "1.svg");
#else
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(223.3, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(323.6, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(224.3, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(324.9, 0.1));
#endif
  }
  {
    // The non-overlapping atom sets should have radii the same size.
    std::string smiles = "CO[C@@H](O)C1=C(O[C@H](F)Cl)C(C#N)=C1ONNC[NH3+]";
    std::unique_ptr<ROMol> m(SmilesToMol(smiles));
    RDDepict::compute2DCoords(*m);

    std::vector<std::string> smarts = {"CONN", "COC[OH]", "N#CC~CO"};
    std::vector<DrawColour> colours = {DrawColour(1.0, 0.0, 0.0),
                                       DrawColour(0.0, 1.0, 0.0),
                                       DrawColour(0.0, 0.0, 1.0)};
    std::map<int, std::vector<DrawColour>> ha_map;
    std::map<int, std::vector<DrawColour>> hb_map;

    for (size_t i = 0; i < smarts.size(); ++i) {
      std::vector<int> hit_atoms = get_all_hit_atoms(*m, smarts[i]);
      update_colour_map(hit_atoms, colours[i], ha_map);
    }
    std::map<int, double> h_rads;
    std::map<int, int> h_lw_mult;
    MolDraw2DSVG drawer(500, 500);
    drawer.drawOptions().multiColourHighlightStyle =
        RDKit::MultiColourHighlightStyle::LASSO;
    drawer.drawMoleculeWithHighlights(*m, "Lasso 2", ha_map, hb_map, h_rads,
                                      h_lw_mult);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(baseName + "2.svg");
    outs << text;
    outs.flush();
    outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    // atom 0 should have 1 green arc
    std::regex a0(
        "<path class='atom-0' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+).*stroke:#00FF00;");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), a0),
                      std::sregex_iterator()));
    CHECK(match_count == 1);
    auto a0reg = std::sregex_iterator(text.begin(), text.end(), a0);
    auto dat1 = *a0reg;
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(387.1, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(138.3, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(387.8, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(137.7, 0.1));
    check_file_hash(baseName + "2.svg");
#endif
  }
  {
    // Another example.
    std::string smiles = "c1ccncc1c1ccc(C2CCC2)cc1";
    std::unique_ptr<ROMol> m(SmilesToMol(smiles));
    RDDepict::compute2DCoords(*m);

    std::vector<std::string> smarts = {"a1aaaaa1a1aaaaa1", "c1ccccn1",
                                       "c1ccccc1", "C1CCC1"};
    std::vector<DrawColour> colours = {
        DrawColour(1.0, 0.0, 0.0), DrawColour(0.0, 1.0, 0.0),
        DrawColour(0.0, 0.0, 1.0), DrawColour(1.0, 0.55, 0.0)};
    std::map<int, std::vector<DrawColour>> ha_map;
    std::map<int, std::vector<DrawColour>> hb_map;

    for (size_t i = 0; i < smarts.size(); ++i) {
      std::vector<int> hit_atoms = get_all_hit_atoms(*m, smarts[i]);
      update_colour_map(hit_atoms, colours[i], ha_map);
    }
    std::map<int, double> h_rads;
    std::map<int, int> h_lw_mult;
    MolDraw2DSVG drawer(500, 500);
    drawer.drawOptions().multiColourHighlightStyle =
        RDKit::MultiColourHighlightStyle::LASSO;
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawMoleculeWithHighlights(*m, "Lasso 3", ha_map, hb_map, h_rads,
                                      h_lw_mult);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(baseName + "3.svg");
    outs << text;
    outs.flush();
    outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    // atom 0 should have 4 arcs
    std::regex a0(
        "<path class='atom-0' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), a0),
                      std::sregex_iterator()));
    CHECK(match_count == 4);
    auto a0reg = std::sregex_iterator(text.begin(), text.end(), a0);
    auto dat1 = *a0reg;
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(228.9, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(94.6, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(228.8, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(93.6, 0.1));
    a0reg++;
    dat1 = *a0reg;
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(244.1, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(81.1, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(245.1, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(81.5, 0.1));
    check_file_hash(baseName + "3.svg");
#endif
  }
  {
    // Showing use of highlight_bond_map to control which bonds are drawn.
    // Bond highlight colours are ignored.
    std::string smiles = "c1ccccc1c1ccccc1";
    std::unique_ptr<ROMol> m(SmilesToMol(smiles));
    RDDepict::compute2DCoords(*m);
    std::map<int, std::vector<DrawColour>> ha_map;
    for (int i = 0; i < 12; ++i) {
      ha_map.insert(
          std::pair{i, std::vector<DrawColour>(1, DrawColour(1.0, 0.0, 0.0))});
    }
    std::map<int, std::vector<DrawColour>> hb_map;
    {
      MolDraw2DSVG drawer(500, 500);
      drawer.drawOptions().multiColourHighlightStyle =
          RDKit::MultiColourHighlightStyle::LASSO;
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawMoleculeWithHighlights(*m, "Lasso 4", ha_map, hb_map, h_rads,
                                        h_lw_mult);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(baseName + "4.svg");
      outs << text;
      outs.flush();
      outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
      // All the atoms should have 2 arcs except 5 and 6.  Check those for
      // atom 5.
      std::regex a5(
          "<path class='atom-5' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
      std::ptrdiff_t const match_count(
          std::distance(std::sregex_iterator(text.begin(), text.end(), a5),
                        std::sregex_iterator()));
      CHECK(match_count == 3);
      auto a5reg = std::sregex_iterator(text.begin(), text.end(), a5);
      auto dat1 = *a5reg;
      CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(221.0, 0.1));
      CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(206.7, 0.1));
      CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(219.7, 0.1));
      CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(206.2, 0.1));
      a5reg++;
      dat1 = *a5reg;
      CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(215.1, 0.1));
      CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(177.9, 0.1));
      CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(216.2, 0.1));
      CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(177.0, 0.1));
      a5reg++;
      dat1 = *a5reg;
      CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(243.0, 0.1));
      CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(187.2, 0.1));
      CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(243.3, 0.1));
      CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(188.6, 0.1));
      // There should be 2 lines in red, the lasso along the bi-phenyl
      // bond.
      std::regex bond5("<path class='bond-5 atom-5 atom-6.*stroke:#FF0000;");
      std::ptrdiff_t const match_count1(
          std::distance(std::sregex_iterator(text.begin(), text.end(), bond5),
                        std::sregex_iterator()));
      CHECK(match_count1 == 2);
      check_file_hash(baseName + "4.svg");
#endif
    }
    // Set up the bond highlights for everything but the bi-phenyl bond,
    // colouring the bonds green although the colour will be ignored.
    for (int i = 0; i < 13; ++i) {
      if (i != 5) {
        hb_map.insert(std::pair{
            i, std::vector<DrawColour>(1, DrawColour(0.0, 1.0, 0.0))});
      }
    }
    {
      MolDraw2DSVG drawer(500, 500);
      drawer.drawOptions().multiColourHighlightStyle =
          RDKit::MultiColourHighlightStyle::LASSO;
      drawer.drawOptions().addAtomIndices = true;
      drawer.drawOptions().addBondIndices = true;
      drawer.drawMoleculeWithHighlights(*m, "Lasso 5", ha_map, hb_map, h_rads,
                                        h_lw_mult);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs(baseName + "5.svg");
      outs << text;
      outs.flush();
      outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
      // All the atoms should have 2 arcs except 5 and 6.  Check those for
      // atom 11.
      std::regex a11(
          "<path class='atom-11' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
      std::ptrdiff_t const match_count(
          std::distance(std::sregex_iterator(text.begin(), text.end(), a11),
                        std::sregex_iterator()));
      CHECK(match_count == 2);
      auto a11reg = std::sregex_iterator(text.begin(), text.end(), a11);
      auto dat1 = *a11reg;
      CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(346.2, 0.1));
      CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(279.1, 0.1));
      CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(345.0, 0.1));
      CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(278.7, 0.1));
      a11reg++;
      dat1 = *a11reg;
      CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(340.5, 0.1));
      CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(250.9, 0.1));
      CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(341.6, 0.1));
      CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(250.0, 0.1));

      // There should not be any red lines for bond 5.
      std::regex bond5("<path class='bond-5 atom-5 atom-6.*stroke:#FF0000;");
      std::ptrdiff_t const match_count1(
          std::distance(std::sregex_iterator(text.begin(), text.end(), bond5),
                        std::sregex_iterator()));
      CHECK(match_count1 == 0);
      check_file_hash(baseName + "5.svg");
#endif
    }
  }
  {
    // Bug with large radii lassos.
    auto m = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 19 19 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 2.745421 0.232979 0.000000 0
M  V30 2 O 1.879821 -0.268021 0.000000 0
M  V30 3 C 1.013221 0.231179 0.000000 0
M  V30 4 O 1.012421 1.231179 0.000000 0
M  V30 5 C 0.147621 -0.269821 0.000000 0
M  V30 6 C -0.110179 -1.236021 0.000000 0
M  V30 7 O 0.390821 -2.101621 0.000000 0
M  V30 8 C 1.390821 -2.100621 0.000000 0
M  V30 9 F 1.889821 -1.234221 0.000000 0
M  V30 10 Cl 1.891621 -2.966221 0.000000 0
M  V30 11 C -1.076379 -0.978021 0.000000 0
M  V30 12 C -1.941979 -1.479021 0.000000 0
M  V30 13 N -2.807579 -1.980021 0.000000 0
M  V30 14 C -0.818579 -0.011821 0.000000 0
M  V30 15 O -1.319379 0.853779 0.000000 0
M  V30 16 N -0.820379 1.720379 0.000000 0
M  V30 17 N -1.321379 2.585779 0.000000 0
M  V30 18 C -0.822379 3.452379 0.000000 0
M  V30 19 N -1.323379 4.317779 0.000000 0 CHG=1 VAL=4
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4 CFG=3
M  V30 4 1 3 5
M  V30 5 2 5 6
M  V30 6 1 6 7
M  V30 7 1 7 8
M  V30 8 1 8 9 CFG=3
M  V30 9 1 8 10
M  V30 10 1 6 11
M  V30 11 1 11 12
M  V30 12 3 12 13
M  V30 13 2 11 14
M  V30 14 1 14 15
M  V30 15 1 15 16
M  V30 16 1 16 17
M  V30 17 1 17 18
M  V30 18 1 18 19
M  V30 19 1 14 5
M  V30 END BOND
M  V30 END CTAB
M  END)CTAB"_ctab;
    REQUIRE(m);
    std::vector<std::string> smarts = {"CONN", "N#CC~CO", "C=CON", "CONNCN"};
    std::vector<DrawColour> colours = {
        DrawColour(1.0, 0.0, 0.0), DrawColour(0.0, 1.0, 0.0),
        DrawColour(0.0, 0.0, 1.0), DrawColour(1.0, 0.55, 0.0)};
    std::map<int, std::vector<DrawColour>> ha_map;
    std::map<int, std::vector<DrawColour>> hb_map;
    for (size_t i = 0; i < smarts.size(); ++i) {
      std::vector<int> hit_atoms = get_all_hit_atoms(*m, smarts[i]);
      update_colour_map(hit_atoms, colours[i], ha_map);
    }
    std::map<int, double> h_rads;
    for (auto [idx, val] : ha_map) {
      h_rads[idx] = 0.4;
    }
    MolDraw2DSVG drawer(500, 500);
    drawer.drawOptions().fillHighlights = false;
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().multiColourHighlightStyle =
        RDKit::MultiColourHighlightStyle::LASSO;
    drawer.drawMoleculeWithHighlights(*m, "Lasso 6", ha_map, hb_map, h_rads,
                                      h_lw_mult);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(baseName + "6.svg");
    outs << text;
    outs.flush();
    outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    // The arcs on 13 have been a hassle in the past.  There should be 6 of them
    std::regex a13(
        "<path class='atom-13' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), a13),
                      std::sregex_iterator()));
    CHECK(match_count == 6);
    // Check the penultimate one is in the right place
    auto a13reg = std::sregex_iterator(text.begin(), text.end(), a13);
    // you can't add 4, apparently.
    a13reg++;
    a13reg++;
    a13reg++;
    a13reg++;
    auto dat1 = *a13reg;
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(236.1, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(238.2, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(238.9, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(239.4, 0.1));
    check_file_hash(baseName + "6.svg");
#endif
  }
  {
    // Bug with different radii in lassos.
    auto m = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 19 19 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 2.745421 0.232979 0.000000 0
M  V30 2 O 1.879821 -0.268021 0.000000 0
M  V30 3 C 1.013221 0.231179 0.000000 0
M  V30 4 O 1.012421 1.231179 0.000000 0
M  V30 5 C 0.147621 -0.269821 0.000000 0
M  V30 6 C -0.110179 -1.236021 0.000000 0
M  V30 7 O 0.390821 -2.101621 0.000000 0
M  V30 8 C 1.390821 -2.100621 0.000000 0
M  V30 9 F 1.889821 -1.234221 0.000000 0
M  V30 10 Cl 1.891621 -2.966221 0.000000 0
M  V30 11 C -1.076379 -0.978021 0.000000 0
M  V30 12 C -1.941979 -1.479021 0.000000 0
M  V30 13 N -2.807579 -1.980021 0.000000 0
M  V30 14 C -0.818579 -0.011821 0.000000 0
M  V30 15 O -1.319379 0.853779 0.000000 0
M  V30 16 N -0.820379 1.720379 0.000000 0
M  V30 17 N -1.321379 2.585779 0.000000 0
M  V30 18 C -0.822379 3.452379 0.000000 0
M  V30 19 N -1.323379 4.317779 0.000000 0 CHG=1 VAL=4
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4 CFG=3
M  V30 4 1 3 5
M  V30 5 2 5 6
M  V30 6 1 6 7
M  V30 7 1 7 8
M  V30 8 1 8 9 CFG=3
M  V30 9 1 8 10
M  V30 10 1 6 11
M  V30 11 1 11 12
M  V30 12 3 12 13
M  V30 13 2 11 14
M  V30 14 1 14 15
M  V30 15 1 15 16
M  V30 16 1 16 17
M  V30 17 1 17 18
M  V30 18 1 18 19
M  V30 19 1 14 5
M  V30 END BOND
M  V30 END CTAB
M  END)CTAB"_ctab;
    REQUIRE(m);
    std::vector<std::string> smarts = {"CONN", "N#CC~CO", "C=CON", "CONNCN"};
    std::vector<DrawColour> colours = {
        DrawColour(1.0, 0.0, 0.0), DrawColour(0.0, 1.0, 0.0),
        DrawColour(0.0, 0.0, 1.0), DrawColour(1.0, 0.55, 0.0)};
    std::map<int, std::vector<DrawColour>> ha_map;
    std::map<int, std::vector<DrawColour>> hb_map;
    for (size_t i = 0; i < smarts.size(); ++i) {
      std::vector<int> hit_atoms = get_all_hit_atoms(*m, smarts[i]);
      update_colour_map(hit_atoms, colours[i], ha_map);
    }
    std::map<int, double> h_rads;
    for (auto [idx, val] : ha_map) {
      h_rads[idx] = 0.3;
    }
    h_rads[13] = 0.4;
    MolDraw2DSVG drawer(500, 500);
    drawer.drawOptions().fillHighlights = false;
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().multiColourHighlightStyle =
        RDKit::MultiColourHighlightStyle::LASSO;
    drawer.drawMoleculeWithHighlights(*m, "Lasso 7", ha_map, hb_map, h_rads,
                                      h_lw_mult);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(baseName + "7.svg");
    outs << text;
    outs.flush();
    outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    // The arcs on 13 have been a hassle in the past.  There should be 6 of them
    std::regex a13(
        "<path class='atom-13' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), a13),
                      std::sregex_iterator()));
    CHECK(match_count == 6);
    // Check the last one is in the right place
    auto a13reg = std::sregex_iterator(text.begin(), text.end(), a13);
    // you can't add 5, apparently.
    a13reg++;
    a13reg++;
    a13reg++;
    a13reg++;
    a13reg++;
    auto dat1 = *a13reg;
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(244.1, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(218.7, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(248.2, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(220.8, 0.1));
    check_file_hash(baseName + "7.svg");
#endif
  }
  {
    // Simple 4-connected and 0-connected atoms test.
    auto m = R"CTAB(
     RDKit          2D

  6  4  0  0  0  0  0  0  0  0999 V2000
   -1.2990   -0.7500    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.0000   -0.0000    0.0000 S   0  0  0  0  0  0  0  0  0  0  0  0
    0.7500   -1.2990    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7500    1.2990    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    1.2990    0.7500    0.0000 N   0  0  0  0  0  4  0  0  0  0  0  0
    2.2990    0.0000    0.0000 Cl  0  0  0  0  0 15  0  0  0  0  0  0
  1  2  1  0
  2  3  2  0
  2  4  2  0
  2  5  1  0
M  CHG  2   5   1   6  -1
M  END)CTAB"_ctab;
    REQUIRE(m);
    MolDraw2DSVG drawer(500, 500);
    drawer.drawOptions().fillHighlights = false;
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().multiColourHighlightStyle =
        RDKit::MultiColourHighlightStyle::LASSO;
    std::map<int, std::vector<DrawColour>> ha_map;
    std::map<int, std::vector<DrawColour>> hb_map;
    std::vector<DrawColour> colours = {
        DrawColour(1.0, 0.0, 0.0), DrawColour(0.0, 1.0, 0.0),
        DrawColour(0.0, 0.0, 1.0), DrawColour(1.0, 0.55, 0.0)};
    std::vector<DrawColour> cvec(1, colours[0]);
    for (unsigned int i = 0; i < m->getNumAtoms(); ++i) {
      ha_map.insert(std::make_pair(i, cvec));
    }

    std::map<int, double> h_rads;
    std::map<int, int> h_lw_mult;
    drawer.drawMoleculeWithHighlights(*m, "Lasso 8", ha_map, hb_map, h_rads,
                                      h_lw_mult);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(baseName + "8.svg");
    outs << text;
    outs.flush();
    outs.close();
#ifdef RDK_BUILD_FREETYPE_SUPPORT
    // Check one of the arcs starts in the right place.  There was a time
    // when they didn't on Windows machines.
    std::regex a0(
        "<path class='atom-0' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
    auto dat1 = *std::sregex_iterator(text.begin(), text.end(), a0);
    CHECK_THAT(stod(dat1[1]), Catch::Matchers::WithinAbs(87.6, 0.1));
    CHECK_THAT(stod(dat1[2]), Catch::Matchers::WithinAbs(318.1, 0.1));
    CHECK_THAT(stod(dat1[3]), Catch::Matchers::WithinAbs(86.6, 0.1));
    CHECK_THAT(stod(dat1[4]), Catch::Matchers::WithinAbs(320.7, 0.1));
    // There should be no arc for atom 1.
    std::regex a1(
        "<path class='atom-1' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), a1),
                      std::sregex_iterator()));
    CHECK(match_count == 0);
    check_file_hash(baseName + "8.svg");
#endif
  }
}

TEST_CASE("Github 6683 - SVGs with ridiculous width and/or height") {
  std::string baseName = "testGithub6683_";

  {
    const char *rxnBlock = R"RXN($RXN

      Mrv1920  090120231611

  3  1
$MOL

  Mrv1920 09012316112D

  1  0  0  0  0  0            999 V2000
  -12.3227   -0.2785    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
M  END
$MOL

  Mrv1920 09012316112D

 11 11  0  0  0  0            999 V2000
   -6.0796   -0.5503    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
   -6.7352   -0.0493    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.6291    0.7688    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -7.4967   -0.3666    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -8.1522    0.1344    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -8.9137   -0.1829    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -9.5692    0.3181    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  -10.3307    0.0008    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  -10.4370   -0.8173    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -9.7813   -1.3182    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -9.0199   -1.0009    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  2  0  0  0  0
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  4  0  0  0  0
  7  8  4  0  0  0  0
  8  9  4  0  0  0  0
  9 10  4  0  0  0  0
 10 11  4  0  0  0  0
 11  6  4  0  0  0  0
M  END
$MOL

  Mrv1920 09012316112D

 10 10  0  0  0  0            999 V2000
   -3.2982    1.9786    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.4043    1.1605    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7488    0.6596    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9872    0.9767    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8547   -0.1585    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1992   -0.6594    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3055   -1.4777    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.0669   -1.7949    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.7225   -1.2939    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.6163   -0.4759    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  2  0  0  0  0
  3  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10  5  1  0  0  0  0
M  END
$MOL

  Mrv1920 09012316112D

 20 21  0  0  0  0            999 V2000
    7.3862    1.9786    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.2800    1.1605    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.9356    0.6596    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.6971    0.9768    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.8294   -0.1586    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.4850   -0.6595    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.3789   -1.4777    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.6173   -1.7950    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.9619   -1.2939    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.0679   -0.4758    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    6.4124    0.0252    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.5186    0.8432    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.6509   -0.2920    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.9954    0.2089    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2337   -0.1084    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5784    0.3926    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8166    0.0753    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.7107   -0.7427    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3661   -1.2438    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1276   -0.9266    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  2  0  0  0  0
  3  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  2  0  0  0  0
 11 13  1  0  0  0  0
 13 14  1  0  0  0  0
 14 15  1  0  0  0  0
 15 16  4  0  0  0  0
 16 17  4  0  0  0  0
 17 18  4  0  0  0  0
 18 19  4  0  0  0  0
 19 20  4  0  0  0  0
 10  5  1  0  0  0  0
 20 15  4  0  0  0  0
M  END)RXN";

    std::unique_ptr<ChemicalReaction> rxn(RxnBlockToChemicalReaction(rxnBlock));
    MolDraw2DSVG drawer(-1, -1);
    auto reactIter = rxn->beginReactantTemplates();
    CHECK_THROWS_AS(MolDraw2DUtils::setACS1996Options(
                        drawer.drawOptions(),
                        MolDraw2DUtils::meanBondLength(*(*reactIter)) * 0.7),
                    ValueErrorException);
  }
}

TEST_CASE("Github 6685 - flexicanvas cuts off bottom of reaction") {
  std::string baseName = "testGithub6685_";

  auto checkImage = [](const std::string &text) {
    // extract the dimensions of the image
    std::regex getDims("width='(\\d+)px' height='(\\d+)px' viewBox=");
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), getDims);
    auto width = stod((*match_begin)[1]);
    auto height = stod((*match_begin)[2]);
    std::regex bond(
        "<path class='bond-\\d+ atom-\\d+ atom-\\d+' d='M (-?\\d+.\\d+),(-?\\d+.\\d+) L (-?\\d+.\\d+),(-?\\d+.\\d+)' style=");
    std::regex character(
        "Q (-?\\d+.\\d+) (-?\\d+.\\d+), (-?\\d+.\\d+) (-?\\d+.\\d+)");
    for (const auto &reg : {bond, character}) {
      match_begin = std::sregex_iterator(text.begin(), text.end(), reg);
      auto match_end = std::sregex_iterator();
      for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
        std::smatch match = *i;
        auto x1 = stod(match[1]);
        auto y1 = stod(match[2]);
        auto x2 = stod(match[3]);
        auto y2 = stod(match[4]);
        CHECK(x1 >= 0);
        CHECK(x1 <= width);
        CHECK((y1 >= 0 && y1 <= height));
        CHECK(y1 <= height);
        CHECK(x2 >= 0);
        CHECK(x2 <= width);
        CHECK(y2 >= 0);
        CHECK(y2 <= height);
      }
    }
  };

  {
    const char *rxnBlock = R"RXN($RXN

      Mrv1920  090120231611

  3  1
$MOL

  Mrv1920 09012316112D

  1  0  0  0  0  0            999 V2000
  -12.3227   -0.2785    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
M  END
$MOL

  Mrv1920 09012316112D

 11 11  0  0  0  0            999 V2000
   -6.0796   -0.5503    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
   -6.7352   -0.0493    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.6291    0.7688    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -7.4967   -0.3666    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -8.1522    0.1344    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -8.9137   -0.1829    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -9.5692    0.3181    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  -10.3307    0.0008    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  -10.4370   -0.8173    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -9.7813   -1.3182    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -9.0199   -1.0009    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  2  0  0  0  0
  2  4  1  0  0  0  0
  4  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  4  0  0  0  0
  7  8  4  0  0  0  0
  8  9  4  0  0  0  0
  9 10  4  0  0  0  0
 10 11  4  0  0  0  0
 11  6  4  0  0  0  0
M  END
$MOL

  Mrv1920 09012316112D

 10 10  0  0  0  0            999 V2000
   -3.2982    1.9786    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.4043    1.1605    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.7488    0.6596    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.9872    0.9767    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8547   -0.1585    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.1992   -0.6594    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.3055   -1.4777    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.0669   -1.7949    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.7225   -1.2939    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.6163   -0.4759    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  2  0  0  0  0
  3  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10  5  1  0  0  0  0
M  END
$MOL

  Mrv1920 09012316112D

 20 21  0  0  0  0            999 V2000
    7.3862    1.9786    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.2800    1.1605    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.9356    0.6596    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.6971    0.9768    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    7.8294   -0.1586    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.4850   -0.6595    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    8.3789   -1.4777    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.6173   -1.7950    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.9619   -1.2939    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.0679   -0.4758    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    6.4124    0.0252    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.5186    0.8432    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    5.6509   -0.2920    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    4.9954    0.2089    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2337   -0.1084    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.5784    0.3926    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.8166    0.0753    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.7107   -0.7427    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.3661   -1.2438    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.1276   -0.9266    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  3  4  2  0  0  0  0
  3  5  1  0  0  0  0
  5  6  1  0  0  0  0
  6  7  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  1  0  0  0  0
  9 10  1  0  0  0  0
 10 11  1  0  0  0  0
 11 12  2  0  0  0  0
 11 13  1  0  0  0  0
 13 14  1  0  0  0  0
 14 15  1  0  0  0  0
 15 16  4  0  0  0  0
 16 17  4  0  0  0  0
 17 18  4  0  0  0  0
 18 19  4  0  0  0  0
 19 20  4  0  0  0  0
 10  5  1  0  0  0  0
 20 15  4  0  0  0  0
M  END)RXN";

    std::unique_ptr<ChemicalReaction> rxn(RxnBlockToChemicalReaction(rxnBlock));
    MolDraw2DSVG drawer(-1, -1);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs((baseName + "1.svg").c_str());
    outs << text;
    outs.close();

    checkImage(text);
    check_file_hash(baseName + "1.svg");
  }
  {
    const char *rxnBlock = R"RXN($RXN

      Mrv1920  090220231847

  2  1
$MOL

  Mrv1920 09022318472D

  2  1  0  0  0  0            999 V2000
   -7.4817   -0.2130    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -6.6567   -0.2130    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
M  END
$MOL

  Mrv1920 09022318472D

  9  8  0  0  0  0            999 V2000
   -3.3781    2.1354    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.5235    1.3233    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -4.2996    1.0435    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8932    0.7914    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.0387   -0.0206    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.7812   -0.3803    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.8567   -1.3430    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.4672   -0.6157    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.6500   -0.5031    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0  0  0  0
  2  3  1  0  0  0  0
  2  4  1  0  0  0  0
  4  5  2  0  0  0  0
  5  6  1  0  0  0  0
  7  8  1  0  0  0  0
  8  9  2  0  0  0  0
  8  5  1  0  0  0  0
M  END
$MOL

  Mrv1920 09022318472D

  8  8  0  0  0  0            999 V2000
    5.5359   -0.2650    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.3537    1.0574    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.6115    0.6978    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.7993    0.8433    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.4102    0.1159    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    3.9815   -0.4790    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    4.7240   -0.1195    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    2.5929    0.0033    0.0000 H   0  0  0  0  0  0  0  0  0  0  0  0
  2  3  1  0  0  0  0
  3  4  4  0  0  0  0
  4  5  4  0  0  0  0
  5  6  4  0  0  0  0
  6  7  4  0  0  0  0
  7  1  1  0  0  0  0
  7  3  4  0  0  0  0
  5  8  1  0  0  0  0
M  END)RXN";

    std::unique_ptr<ChemicalReaction> rxn(RxnBlockToChemicalReaction(rxnBlock));
    MolDraw2DSVG drawer(-1, -1);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs((baseName + "2.svg").c_str());
    outs << text;
    outs.close();
    checkImage(text);
    check_file_hash(baseName + "2.svg");
  }
  {
    const char *rxnBlock = R"RXN($RXN

      Mrv1920  090220231850

  1  2
$MOL

  Mrv1920 09022318502D

 20 22  0  0  0  0            999 V2000
   -2.4533   -0.5079    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.0179    0.0939    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.8212   -0.0941    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.0600   -0.8837    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.8633   -1.0715    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
   -5.4277   -0.4698    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.2311   -0.6577    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.7954   -0.0558    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -7.5987   -0.2436    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -7.8377   -1.0333    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -7.2734   -1.6351    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -6.4701   -1.4473    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.1888    0.3199    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.3855    0.5077    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.1465    1.2974    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.7110    1.8993    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.5142    1.7114    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -5.7532    0.9218    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -3.4957   -1.4854    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.6923   -1.2975    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  4  0  0  0  0
  2  3  4  0  0  0  0
  3  4  4  0  0  0  0
  4  5  1  0  0  0  0
  5  6  2  3  0  0  0
  6  7  1  0  0  0  0
  7  8  4  0  0  0  0
  8  9  4  0  0  0  0
  9 10  4  0  0  0  0
 10 11  4  0  0  0  0
 11 12  4  0  0  0  0
  6 13  1  0  0  0  0
 13 14  4  0  0  0  0
 14 15  4  0  0  0  0
 15 16  4  0  0  0  0
 16 17  4  0  0  0  0
 17 18  4  0  0  0  0
  4 19  4  0  0  0  0
 19 20  4  0  0  0  0
 20  1  4  0  0  0  0
 12  7  4  0  0  0  0
 18 13  4  0  0  0  0
M  END
$MOL

  Mrv1920 09022318502D

  7  7  0  0  0  0            999 V2000
    5.5920    0.3948    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.0277    0.9966    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    4.2244    0.8087    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.9855    0.0191    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.1821   -0.1689    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    4.5499   -0.5827    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.3531   -0.3949    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  4  0  0  0  0
  2  3  4  0  0  0  0
  3  4  4  0  0  0  0
  4  5  1  0  0  0  0
  4  6  4  0  0  0  0
  6  7  4  0  0  0  0
  7  1  4  0  0  0  0
M  END
$MOL

  Mrv1920 09022318502D

  1  0  0  0  0  0            999 V2000
    8.3990    0.0732    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
M  END
)RXN";

    std::unique_ptr<ChemicalReaction> rxn(RxnBlockToChemicalReaction(rxnBlock));
    MolDraw2DSVG drawer(-1, -1);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs((baseName + "3.svg").c_str());
    outs << text;
    outs.close();
    checkImage(text);
    check_file_hash(baseName + "3.svg");
  }
  {
    // This one was clipped on the right hand side at one point.
    std::string smarts(
        "[cH:1]1[cH:2][cH:3][c:4][cH:5][cH:6]1>>[cH:3]1[cH:2][c:1]([cH:6][cH:5][c:4]1)Cl");
    bool useSmiles = true;
    std::unique_ptr<ChemicalReaction> rxn(
        RxnSmartsToChemicalReaction(smarts, nullptr, useSmiles));
    MolDraw2DSVG drawer(600, 150);
    drawer.drawOptions().padding = 0.0;
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs((baseName + "4.svg").c_str());
    outs << text;
    outs.close();
    checkImage(text);
    check_file_hash(baseName + "4.svg");
  }
}

TEST_CASE("Github 6749 : various bad things in the lasso highlighting") {
  std::string baseName = "bad_lasso_";
  auto mol =
      "CCCS(=O)(=O)Nc1ccc(F)c(c1F)C(=O)c2c[nH]c3c2cc(cn3)c4ccc(Cl)cc4"_smiles;
  REQUIRE(mol);

  auto update_colour_map =
      [](const std::vector<int> &ats, DrawColour col,
         std::map<int, std::vector<DrawColour>> &ha_map) -> void {
    for (auto h : ats) {
      auto ex = ha_map.find(h);
      if (ex == ha_map.end()) {
        std::vector<DrawColour> cvec(1, col);
        ha_map.insert(make_pair(h, cvec));
      } else {
        if (ex->second.end() ==
            find(ex->second.begin(), ex->second.end(), col)) {
          ex->second.push_back(col);
        }
      }
    }
  };
  auto update_bond_map =
      [](const std::vector<int> &ats, DrawColour col, const ROMol &mol,
         std::map<int, std::vector<DrawColour>> &hb_map) -> void {
    for (auto at1 : ats) {
      for (auto at2 : ats) {
        if (at1 > at2) {
          auto b = mol.getBondBetweenAtoms(at1, at2);
          if (b) {
            auto ex = hb_map.find(b->getIdx());
            if (ex == hb_map.end()) {
              std::vector<DrawColour> cvec(1, col);
              hb_map.insert(make_pair(b->getIdx(), cvec));
            } else {
              ex->second.push_back(col);
            }
          }
        }
      }
    }
  };
  std::vector<DrawColour> colours = {
      DrawColour(1.0, 0.2, 1.0), DrawColour(0.2, 1.0, 1.0),
      DrawColour(0.8, 0.8, 0.2), DrawColour(0.4, 0.4, 0.2)};
  std::map<int, std::vector<DrawColour>> ha_map;
  std::map<int, std::vector<DrawColour>> hb_map;
  update_colour_map({6, 19, 25}, colours[0], ha_map);
  update_bond_map({6, 19, 25}, colours[0], *mol, hb_map);

  update_colour_map({25, 4, 5, 11, 14, 16}, colours[1], ha_map);
  update_bond_map({25, 4, 5, 11, 14, 16}, colours[1], *mol, hb_map);

  update_colour_map({19, 25, 17, 18, 20, 21, 7,  8,  9,  10, 12,
                     13, 22, 23, 24, 26, 27, 28, 29, 31, 32},
                    colours[2], ha_map);
  update_bond_map({19, 25, 17, 18, 20, 21, 7,  8,  9,  10, 12,
                   13, 22, 23, 24, 26, 27, 28, 29, 31, 32},
                  colours[2], *mol, hb_map);
  // If there are duplicate colours in the list, there was a bug where
  // arcs weren't removed correctly (Github 6749)
  ha_map[20].push_back(colours[2]);
  ha_map[21].push_back(colours[2]);

  update_colour_map({7, 8, 9, 10, 12, 13, 26, 27, 28, 29, 31, 32}, colours[3],
                    ha_map);
  update_bond_map({7, 8, 9, 10, 12, 13, 26, 27, 28, 29, 31, 32}, colours[3],
                  *mol, hb_map);

  std::map<int, double> h_rads;
  std::map<int, int> h_lw_mult;
  MolDraw2DSVG drawer(600, 400);
  drawer.drawOptions().multiColourHighlightStyle =
      RDKit::MultiColourHighlightStyle::LASSO;
  drawer.drawOptions().fillHighlights = false;
  drawer.drawOptions().addAtomIndices = true;
  drawer.drawMoleculeWithHighlights(*mol, "Bad Lasso", ha_map, hb_map, h_rads,
                                    h_lw_mult);
  drawer.finishDrawing();
  std::string text = drawer.getDrawingText();
  std::ofstream outs(baseName + "1.svg");
  outs << text;
  outs.flush();
  outs.close();
  std::regex atom20("<path class='atom-20'");
  // there should be 3 matches for "class='atom-20'" - the buggy version gave 5
  std::ptrdiff_t const match_count(
      std::distance(std::sregex_iterator(text.begin(), text.end(), atom20),
                    std::sregex_iterator()));
  CHECK(match_count == 3);
  check_file_hash(baseName + "1.svg");
}

TEST_CASE("atropisomers") {
  {
    auto mol =
        "CC1=CC=C(Cl)C(C)=C1N1C=CC=C1Cl |(-0.7234,-1.1614,;-0.6697,0.3775,;0.69,1.1007,;0.7439,2.6396,;-0.5622,3.4557,;-0.5085,4.9947,;-1.9218,2.7328,;-3.2279,3.5487,;-1.9757,1.1937,;-3.3354,0.4706,;-3.8113,-0.994,;-5.3513,-0.994,;-5.8272,0.4706,;-4.5813,1.3758,;-4.5813,2.9158,),wD:8.8|"_smiles;
    REQUIRE(mol);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    CHECK(mol->getBondWithIdx(8)->getBondDir() == Bond::BondDir::NONE);
    CHECK(mol->getBondWithIdx(8)->getStereo() ==
          Bond::BondStereo::STEREOATROPCW);

    MOL_PTR_VECT ms{mol.get()};
    {
      MolDraw2DSVG drawer(500, 200, 250, 200);
      std::vector<std::string> legends = {"AtropCanon1"};
      drawer.drawMolecules(ms, &legends);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("AtropCanon1.svg");
      outs << text;
      outs.flush();
      check_file_hash("AtropCanon1.svg");
    }
  }
  {
    auto mol =
        "O=C1C=CNC(=O)N1C(=C)[C@]([C@H](C)Br)([C@@H](F)C)[C@H](Cl)C |(2.8625,1.0561,;2.2921,-0.5174,;3.4688,-1.0018,;3.6019,-2.4682,;2.3988,-3.3169,;1.0621,-2.6992,;0.1062,-3.9298,;0.9288,-1.2328,;-0.5563,-0.6124,;-1.5367,-1.8,;-0.8947,0.9647,;-0.8778,2.5678,;-0.1398,3.9298,;-1.9563,3.6407,;0.5974,1.3136,;1.1268,-0.0778,;1.9954,1.9251,;-2.4534,0.7177,;-3.6019,1.737,;-3.4495,-0.4655,),wD:14.15,wU:7.7,11.13,10.14,17.18,o1:7,10,14,&1:11,17|"_smiles;
    REQUIRE(mol);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    CHECK(mol->getBondWithIdx(7)->getBondDir() == Bond::BondDir::NONE);
    CHECK(mol->getBondWithIdx(7)->getStereo() ==
          Bond::BondStereo::STEREOATROPCCW);

    MOL_PTR_VECT ms{mol.get()};
    {
      MolDraw2DSVG drawer(500, 200, 250, 200);
      // drawer.drawOptions().prepareMolsBeforeDrawing = false;
      std::vector<std::string> legends = {"AtropManyChiralsEnhanced"};
      drawer.drawMolecules(ms, &legends);
      drawer.finishDrawing();
      std::string text = drawer.getDrawingText();
      std::ofstream outs("AtropManyChiralsEnhanced.svg");
      outs << text;
      outs.flush();
      check_file_hash("AtropManyChiralsEnhanced.svg");
    }
  }
}

TEST_CASE("Github6968 - bad bond highlights with triple bonds") {
  // The issue is that in the linear highlight across the triple bond,
  // some of the highlights didn't appear, and others were
  // triangular - the corners of the rectangle weren't all distinct.
  auto m = "ClCC#CCOC(=O)Nc1cccc(c1)Cl"_smiles;
  std::vector<unsigned int> atOrder(m->getNumAtoms(), 0);
  std::iota(atOrder.begin(), atOrder.end(), 0);
  REQUIRE(m);
  {
    // Because I worried about the atom order giving a non-general
    // result, repeat it 10 times with atoms in random order.
    for (int testNum = 0; testNum < 10; ++testNum) {
      std::unique_ptr<ROMol> mol(MolOps::renumberAtoms(*m, atOrder));
      MolDraw2DSVG drawer(350, 300);
      std::vector<int> highlightAtoms = {};
      // Helpfully, the atoms are scrambled but not the bonds.
      std::vector<int> highlightBonds = {1, 2, 3};

      drawer.drawOptions().addAtomIndices = true;
      drawer.drawOptions().addBondIndices = true;
      drawer.drawMolecule(*mol, "", &highlightAtoms, &highlightBonds);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::regex bond(
          "<path class='bond-(\\d+) atom-(\\d+) atom-(\\d+)' d='M (-?\\d+.\\d+),"
          "(-?\\d+.\\d+) L (-?\\d+.\\d+),(-?\\d+.\\d+) L (-?\\d+.\\d+),"
          "(-?\\d+.\\d+) L (-?\\d+.\\d+),(-?\\d+.\\d+) Z' style=");

      auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond);
      auto match_end = std::sregex_iterator();
      for (std::sregex_iterator i = match_begin; i != match_end; ++i) {
        std::smatch match = *i;
        std::vector<Point2D> pts;
        for (int j = 4; j < 12; j += 2) {
          pts.push_back(Point2D(stod(match[j]), stod(match[j + 1])));
        }
        // None of the points should be on top of each other
        for (size_t j = 0; j < 3; ++j) {
          for (size_t k = j + 1; k < 4; ++k) {
            CHECK((pts[j] - pts[k]).lengthSq() > 1.0e-4);
          }
        }
      }
      if (testNum == 0) {
        std::ofstream outs("testGithub6968.svg");
        outs << text;
        outs.close();
        check_file_hash("testGithub6968.svg");
      }
      std::shuffle(atOrder.begin(), atOrder.end(),
                   std::mt19937{std::random_device{}()});
    }
  }
}

TEST_CASE("Github7036 - triple bond to wedge not right") {
  // The issue is that the middle line of a triple bond
  // ends in the wrong place when the incident bond is
  // a wedge.  Wedge to single bond included for visual
  // check that that isn't broken in the fix.
  // The 2 different layouts should be checked as the initial fix didn't work
  // with the 2nd layout.
  std::vector<std::string> smiles = {
      "N#C[C@H]1C[C@@H](CN)CCN1 |(4.10168,-1.04221,;2.70424,-0.4971,;1.30679,0.0480054,;0.135989,-0.889667,;-1.26146,-0.344561,;-2.43226,-1.28223,;-3.82971,-0.737127,;-1.48811,1.13822,;-0.317308,2.07589,;1.08014,1.53078,),wU:2.1,4.4|",
      "N#C[C@H]1C[C@@H](CN)CCN1 |(-2.255,-1.6954,;-1.388,-1.1972,;-0.521,-0.699,;-0.519,0.301,;0.348,0.7992,;0.35,1.7992,;1.217,2.2976,;1.213,0.2976,;1.211,-0.7024,;0.344,-1.2006,),wU:2.1,4.4|"};
  for (int i = 0; i < 2; ++i) {
    auto m = v2::SmilesParse::MolFromSmiles(smiles[i]);
    REQUIRE(m);
    MolDraw2DSVG drawer(350, 300);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::string svgFile(
        std::string("testGithub7036_" + std::string(i ? "1" : "2") + ".svg"));
    std::ofstream outs(svgFile);
    outs << text;
    outs.close();

    std::regex bond(
        "<path class='bond-8 atom-8 atom-9' d='M (-?\\d+.\\d+),(-?\\d+.\\d+)"
        " L (-?\\d+.\\d+),(-?\\d+.\\d+)' style=");
    // The problem is the first line in the bond, which comes in 2 parts
    // that should be co-linear.
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), bond);
    std::smatch match = *match_begin;
    std::vector<Point2D> pts;
    pts.push_back(Point2D(stod(match[1]), stod(match[2])));
    pts.push_back(Point2D(stod(match[3]), stod(match[4])));
    ++match_begin;
    match = *match_begin;
    pts.push_back(Point2D(stod(match[1]), stod(match[2])));
    pts.push_back(Point2D(stod(match[3]), stod(match[4])));
    double dot = pts[0].directionVector(pts[1]).dotProduct(
        pts[2].directionVector(pts[3]));
    CHECK_THAT(fabs(dot), Catch::Matchers::WithinAbs(1.0, 0.001));
    check_file_hash(svgFile);
  }
}

TEST_CASE("Github7317 - very long bond not drawn to both atoms") {
  auto m1 = R"CTAB(2244
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 13 13 0 0 0
M  V30 BEGIN ATOM
M  V30 1 O 2.598085 -1.499986 0.000000 0
M  V30 2 O -1.299010 -3.749995 0.000000 0
M  V30 3 O 9.923686 -6.081460 0.000000 0
M  V30 4 O 3.897122 0.750042 0.000000 0
M  V30 5 C 1.299042 -0.749993 0.000000 0
M  V30 6 C 0.000027 -1.499967 0.000000 0
M  V30 7 C 1.299015 0.749974 0.000000 0
M  V30 8 C -1.299015 -0.749974 0.000000 0
M  V30 9 C -0.000027 1.499967 0.000000 0
M  V30 10 C -1.299042 0.749993 0.000000 0
M  V30 11 C 0.000005 -3.000021 0.000000 0
M  V30 12 C 3.897099 -0.750011 0.000000 0
M  V30 13 C 5.196142 -1.500004 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 5
M  V30 2 1 1 12
M  V30 3 1 2 11
M  V30 4 2 3 11
M  V30 5 2 4 12
M  V30 6 2 5 6
M  V30 7 1 5 7
M  V30 8 1 6 8
M  V30 9 1 6 11
M  V30 10 2 7 9
M  V30 11 2 8 10
M  V30 12 1 9 10
M  V30 13 1 12 13
M  V30 END BOND
M  V30 END CTAB
M  END)CTAB"_ctab;
  REQUIRE(m1);
  MolDraw2DSVG drawer(350, 300);
  drawer.drawOptions().addAtomIndices = true;
  drawer.drawOptions().addBondIndices = true;
  drawer.drawMolecule(*m1);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::regex bond3(
      "<path class='bond-3 atom-2 atom-10' d='M (-?\\d+.\\d+),(-?\\d+.\\d+)"
      " L (-?\\d+.\\d+),(-?\\d+.\\d+)' style=");
  auto match3_begin = std::sregex_iterator(text.begin(), text.end(), bond3);
  auto match3_end = std::sregex_iterator();
  std::vector<Point2D> pts3;
  for (std::sregex_iterator i = match3_begin; i != match3_end; ++i) {
    std::smatch match = *i;
    pts3.push_back(Point2D(stod(match[1]), stod(match[2])));
    pts3.push_back(Point2D(stod(match[3]), stod(match[4])));
  }

  std::regex bond8(
      "<path class='bond-8 atom-5 atom-10' d='M (-?\\d+.\\d+),(-?\\d+.\\d+)"
      " L (-?\\d+.\\d+),(-?\\d+.\\d+)' style=");
  auto match_begin8 = std::sregex_iterator(text.begin(), text.end(), bond8);
  std::smatch match8 = *match_begin8;
  std::vector<Point2D> pts8;
  pts8.push_back(Point2D(stod(match8[1]), stod(match8[2])));
  pts8.push_back(Point2D(stod(match8[3]), stod(match8[4])));

  // pts3[3] and pts3[7] are the atom 10 ends of bond3, pts8[1] is
  // the atom 10 end of bond 8.  They should be close to each other.
  CHECK((pts8[1] - pts3[3]).length() < 10.0);
  CHECK((pts8[1] - pts3[7]).length() < 10.0);
  if ((pts8[1] - pts3[3]).length() >= 10.0 ||
      (pts8[1] - pts3[7]).length() >= 10.0) {
    // Someone will want to have a look at it.
    std::ofstream outs("testGithub7317.svg");
    outs << text;
    outs.close();
  }
}

#ifdef RDK_BUILD_CAIRO_SUPPORT
TEST_CASE(
    "github #7409: drawing mol with a non zero confID results in bad confID error") {
  SECTION("basics") {
    auto m = "CC |(-0.75,0,;0.75,0,)|"_smiles;
    REQUIRE(m);
    CHECK(m->getNumConformers() == 1);
    m->getConformer().setId(5);
    MolDraw2DCairo drawer(350, 300);
    // it's enough to test that this doesn't throw
    drawer.drawMolecule(*m);
  }
}
#endif

TEST_CASE("wedge non-single bonds") {
  int panelHeight = -1;
  int panelWidth = -1;
  bool noFreeType = false;
  MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
  drawer.drawOptions().prepareMolsBeforeDrawing = false;

  SECTION("basics 1: aromatic bonds") {
    auto m =
        "CC(=O)C1=CC=CC=C1C |wU:1.0, (-0.954,-1.74918,;-0.9532,-0.74918,;-1.8188,-0.24858,;-0.0868,-0.24998,;0.7788,-0.75058,;1.6452,-0.25138,;1.646,0.74862,;0.7804,1.24942,;-0.086,0.75002,;-0.9516,1.25082,)|"_smiles;
    REQUIRE(m);
    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINWEDGE);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-1.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-1.svg");
    }

    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINDASH);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-2.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-2.svg");
    }
  }
  SECTION("basics 2 : aromatic bonds, draw to a heteroatom") {
    auto m =
        "CC(=O)C1=NC=CC=C1C |wU:1.0, (-0.954,-1.74918,;-0.9532,-0.74918,;-1.8188,-0.24858,;-0.0868,-0.24998,;0.7788,-0.75058,;1.6452,-0.25138,;1.646,0.74862,;0.7804,1.24942,;-0.086,0.75002,;-0.9516,1.25082,)|"_smiles;
    REQUIRE(m);
    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINWEDGE);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-3.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-3.svg");
    }

    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINDASH);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-4.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-4.svg");
    }
  }

  SECTION("basics 3: double bonds") {
    auto m =
        "CC(=O)C1=CC=CC=C1C |wU:1.0, (-0.954,-1.74918,;-0.9532,-0.74918,;-1.8188,-0.24858,;-0.0868,-0.24998,;0.7788,-0.75058,;1.6452,-0.25138,;1.646,0.74862,;0.7804,1.24942,;-0.086,0.75002,;-0.9516,1.25082,)|"_smiles;
    REQUIRE(m);
    MolOps::Kekulize(*m);
    CHECK(m->getBondBetweenAtoms(3, 4)->getBondType() ==
          Bond::BondType::DOUBLE);
    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINWEDGE);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-5.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-5.svg");
    }

    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINDASH);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-6.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-6.svg");
    }
  }
  SECTION("basics 3: double bonds, draw to a heteroatom") {
    auto m =
        "CC(=O)C1=NC=CC=C1C |wU:1.0, (-0.954,-1.74918,;-0.9532,-0.74918,;-1.8188,-0.24858,;-0.0868,-0.24998,;0.7788,-0.75058,;1.6452,-0.25138,;1.646,0.74862,;0.7804,1.24942,;-0.086,0.75002,;-0.9516,1.25082,)|"_smiles;
    REQUIRE(m);
    MolOps::Kekulize(*m);
    CHECK(m->getBondBetweenAtoms(3, 4)->getBondType() ==
          Bond::BondType::DOUBLE);
    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINWEDGE);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-7.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-7.svg");
    }

    m->getBondBetweenAtoms(3, 4)->setBondDir(Bond::BondDir::BEGINDASH);
    {
      int panelHeight = -1;
      int panelWidth = -1;
      bool noFreeType = false;
      MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
      drawer.drawOptions().prepareMolsBeforeDrawing = false;
      drawer.drawMolecule(*m);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testWedgeNonSingleBonds-8.svg");
      outs << text;
      outs.close();
      check_file_hash("testWedgeNonSingleBonds-8.svg");
    }
  }
  SECTION(
      "basics 3: make sure reapplyMolBlockWedging is called before prepareMolForDrawing") {
    auto m = R"CTAB(
  Mrv2311 05242408162D          

  0  0  0     0  0            999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 14 15 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 2.0006 -1.54 0 0
M  V30 2 N 2.0006 -3.08 0 0
M  V30 3 C 0.6669 -3.85 0 0
M  V30 4 C -0.6668 -3.08 0 0
M  V30 5 C -0.6668 -1.54 0 0
M  V30 6 C -2.0006 -0.77 0 0
M  V30 7 C 0.6669 -0.77 0 0
M  V30 8 C 0.6669 0.77 0 0
M  V30 9 C -0.6668 1.54 0 0
M  V30 10 C -2.0006 0.77 0 0
M  V30 11 C -0.6668 3.08 0 0
M  V30 12 C 0.6669 3.85 0 0
M  V30 13 C 2.0006 3.08 0 0
M  V30 14 C 2.0006 1.54 0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 1 7 5 CFG=3
M  V30 7 2 7 1
M  V30 8 1 7 8
M  V30 9 2 8 9
M  V30 10 1 9 10
M  V30 11 1 9 11
M  V30 12 2 11 12
M  V30 13 1 12 13
M  V30 14 2 13 14
M  V30 15 1 8 14
M  V30 END BOND
M  V30 END CTAB
M  END
)CTAB"_ctab;
    REQUIRE(m);
    int panelHeight = -1;
    int panelWidth = -1;
    bool noFreeType = true;
    MolDraw2DSVG drawer(350, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawOptions().useMolBlockWedging = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testWedgingShouldBeOnSingleBond.svg");
    outs << text;
    outs.close();
    check_file_hash("testWedgingShouldBeOnSingleBond.svg");
    std::regex regex1(
        "<path class='bond-5 atom-6 atom-4'.*style='fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:1\\.0px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1' />");
    std::regex regex2(
        "<path class='bond-5 atom-6 atom-4'.*style='fill:none;fill-rule:evenodd;stroke:#000000;stroke-width:2\\.0px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1' />");
    size_t nRegex1Matches = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), regex1),
        std::sregex_token_iterator());
    CHECK(nRegex1Matches > 6);  // check the bond is hashed
    auto dat2 = *std::sregex_iterator(text.begin(), text.end(), regex2);
    CHECK(dat2.empty());  // check the bond is single
  }
}

TEST_CASE("avoid duplicate enhanced stereo labels") {
  static const std::string AND1("and1");
  auto m = "C[C@H](O)[C@H](C)F |&1:1,3,r|"_smiles;
  REQUIRE(m);
  for (bool addStereoAnnotation : {false, true}) {
    int panelHeight = -1;
    int panelWidth = -1;
    bool noFreeType = true;
    MolDraw2DSVG drawer(300, 300, panelWidth, panelHeight, noFreeType);
    drawer.drawOptions().addStereoAnnotation = addStereoAnnotation;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::string svgFile(std::string(
        "testDuplicateEnhancedStereoLabelsAddAnnotation" +
        std::string(addStereoAnnotation ? "True" : "False") + ".svg"));
    std::ofstream outs(svgFile);
    outs << text;
    outs.close();
    check_file_hash(svgFile);
    for (const char &c : AND1) {
      std::regex regex(std::string("<text\\s+.*>") + c +
                       std::string("</text>"));
      size_t nOccurrences = std::distance(
          std::sregex_token_iterator(text.begin(), text.end(), regex),
          std::sregex_token_iterator());
      // there should be only 2 "and1" labels, not 4
      CHECK(nOccurrences == 2);
    }
  }
}

TEST_CASE("Draw atom map numbers on complex query atoms") {
  std::unique_ptr<ChemicalReaction> rxn(RxnSmartsToChemicalReaction(
      "[C:1](=[O:2])-[OD1].[N!H0:3]>>[C:1](=[O:2])[N:3]"));
  REQUIRE(rxn);
  {
    // Use NO_FREETYPE so that the characters appear in an
    // easily found manner in the SVG.
    MolDraw2DSVG drawer(600, 200, 600, 200, NO_FREETYPE);
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::string svgFile = "testComplexQueryAtomMap.svg";
    std::ofstream outs(svgFile);
    outs << text;
    outs.close();
    check_file_hash(svgFile);
    std::regex regex(std::string("<text\\s+.*>:</text>"));
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), regex),
        std::sregex_token_iterator());
    // there should be 6 colons drawn
    CHECK(nOccurrences == 6);
  }
}

TEST_CASE("Draw hetero atoms in black if highlighted") {
  {
    auto mol = "OC(=O)c1ccc(C(=O)O)cc1"_smiles;
    REQUIRE(mol);
    MolDraw2DSVG drawer(350, 300, 350, 300, NO_FREETYPE);
    drawer.drawOptions().highlightColour = DrawColour(1, 0.0, 0.0);
    std::vector<int> highlightAtoms = {0, 1, 2};
    drawer.drawMolecule(*mol, "", &highlightAtoms);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testHighlightHeteroAtoms_1.svg");
    outs << text;
    outs.close();
    // there should be 3 black characters and 3 red
    std::regex regex1("<text .*;fill:#000000.*</text>");
    size_t nBlack = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), regex1),
        std::sregex_token_iterator());
    CHECK(nBlack == 3);
    std::regex regex2("<text .*;fill:#FF0000.*</text>");
    size_t nRed = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), regex2),
        std::sregex_token_iterator());
    CHECK(nRed == 3);
    check_file_hash("testHighlightHeteroAtoms_1.svg");
  }
  {
    auto mol = "OC(=O)c1ccc(C(=O)O)cc1"_smiles;
    REQUIRE(mol);
    MolDraw2DSVG drawer(350, 300, 350, 300, NO_FREETYPE);
    setDarkMode(drawer);
    std::vector<int> highlightAtoms = {0, 1, 2};
    drawer.drawMolecule(*mol, "", &highlightAtoms);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testHighlightHeteroAtoms_2.svg");
    outs << text;
    outs.close();
    // there should be 3 "carbon" characters and 3 pinky ones
    std::regex regex1("<text .*;fill:#E5E5E5.*</text>");
    size_t nBlack = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), regex1),
        std::sregex_token_iterator());
    CHECK(nBlack == 3);
    std::regex regex2("<text .*;fill:#FF3333.*</text>");
    size_t nRed = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), regex2),
        std::sregex_token_iterator());
    CHECK(nRed == 3);
    check_file_hash("testHighlightHeteroAtoms_2.svg");
  }
}

TEST_CASE("Github 7739 - Bad multi-coloured wedge") {
  std::string fileStem = "testGithub_7739_";
  {
    auto mol =
        "O=C1C=CNC(=O)N1C(=C)[C@]([C@H](C)Br)([C@@H](F)C)[C@H](Cl)C |(2.8625,1.0561,;2.2921,-0.5174,;3.4688,-1.0018,;3.6019,-2.4682,;2.3988,-3.3169,;1.0621,-2.6992,;0.1062,-3.9298,;0.9288,-1.2328,;-0.5563,-0.6124,;-1.5367,-1.8,;-0.8947,0.9647,;-0.8778,2.5678,;-0.1398,3.9298,;-1.9563,3.6407,;0.5974,1.3136,;1.1268,-0.0778,;1.9954,1.9251,;-2.4534,0.7177,;-3.6019,1.737,;-3.4495,-0.4655,),wD:14.15,wU:7.7,11.13,10.14,17.18,o1:7,10,14,&1:11,17|"_smiles;
    REQUIRE(mol);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    MolDraw2DSVG drawer(600, 600);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    std::string legend = fileStem + "1";
    drawer.drawMolecule(*mol, legend);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(fileStem + "1.svg");
    outs << text;
    outs.flush();
    // In the original, buggy version, there were 3 triangles making
    // up the black part of bond 6.  There are only 2 in the fixed version.
    // std::regex bond6(
    //     "<path class='bond-6 atom-7 atom-5' .*style='fill:#000000;"
    //     "fill-rule:evenodd;fill-opacity:1;stroke:#000000;");
    std::regex bond6(
        "<path class='bond-6 atom-5 atom-7' .*style='fill:none;fill-rule:evenodd;stroke:#0000");
    size_t nOccurrences6 = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond6),
        std::sregex_token_iterator());
    // on ARM macs we were getting different wedging... that needs to be looked
    // into separately
    std::regex bond19(
        "<path class='bond-19 atom-7 atom-1' .*style='fill:#000000;"
        "fill-rule:evenodd;fill-opacity:1;stroke:#000000;");
    size_t nOccurrences19 = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond19),
        std::sregex_token_iterator());

    std::regex bond13(
        "<path class='bond-13 atom-10 atom-14' .*style='fill:#000000;"
        "fill-rule:evenodd;fill-opacity:1;stroke:#000000;");
    size_t nOccurrences13 = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond13),
        std::sregex_token_iterator());

    CHECK((nOccurrences6 == 2 || nOccurrences19 == 2 || nOccurrences13 == 2));

    check_file_hash(fileStem + "1.svg");
  }
  // This next not broke in early iterations of the fixing.
  {
    auto mol =
        "N=c1nc([C@@H]2CCCCN2)cc(N)n1O |(0.81024,2.46595,;0.80944,1.46595,;-0.05696,0.966747,;-0.05776,-0.0332533,;-0.92416,-0.532653,;-1.78976,-0.0318533,;-2.65616,-0.531253,;-2.65696,-1.53125,;-1.79136,-2.03185,;-0.92496,-1.53265,;0.80784,-0.534053,;1.67424,-0.0346533,;2.53984,-0.535253,;1.67504,0.965347,;2.54144,1.46475,),wU:4.3|"_smiles;
    REQUIRE(mol);

    MolDraw2DSVG drawer(600, 600);
    MolDraw2DUtils::prepareMolForDrawing(*mol);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    std::string legend = fileStem + "2";
    drawer.drawMolecule(*mol, legend);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(fileStem + "2.svg");
    outs << text;
    outs.flush();
    // bond-3 is now a quadrilateral rather than 2 triangles.
    std::regex bond3(
        "<path class='bond-3 atom-4 atom-3' d='"
        "M \\d+\\.\\d+,\\d+\\.\\d+ "
        "L \\d+\\.\\d+,\\d+\\.\\d+ "
        "L \\d+\\.\\d+,\\d+\\.\\d+ "
        "L \\d+\\.\\d+,\\d+\\.\\d+ Z'"
        " style='fill:#000000;"
        "fill-rule:evenodd;fill-opacity:1;stroke:#000000;");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond3),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 1);
    check_file_hash(fileStem + "2.svg");
  }

  {
    auto mol =
        "O=C1C=CNC(=O)C1C(=C)[C@]([C@H](C)Br)([C@@H](F)C)[C@H](Cl)C |(2.8625,1.0561,;2.2921,-0.5174,;3.4688,-1.0018,;3.6019,-2.4682,;2.3988,-3.3169,;1.0621,-2.6992,;0.1062,-3.9298,;0.9288,-1.2328,;-0.5563,-0.6124,;-1.5367,-1.8,;-0.8947,0.9647,;-0.8778,2.5678,;-0.1398,3.9298,;-1.9563,3.6407,;0.5974,1.3136,;1.1268,-0.0778,;1.9954,1.9251,;-2.4534,0.7177,;-3.6019,1.737,;-3.4495,-0.4655,),wD:14.15,wU:7.7,11.13,10.14,17.18,o1:7,10,14,&1:11,17|"_smiles;
    REQUIRE(mol);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    MolDraw2DSVG drawer(600, 600);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    std::string legend = fileStem + "3";
    drawer.drawMolecule(*mol, legend);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(fileStem + "3.svg");
    outs << text;
    outs.flush();
    std::regex bond19(
        "<path class='bond-19 atom-7 atom-1' .*style='fill:#000000;"
        "fill-rule:evenodd;fill-opacity:1;stroke:#000000;");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond19),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 1);
    check_file_hash(fileStem + "3.svg");
  }
  {
    auto mol =
        "C=C1C=CNC(=O)C1C(=C)[C@]([C@H](C)Br)([C@@H](F)C)[C@H](Cl)C |(2.8625,1.0561,;2.2921,-0.5174,;3.4688,-1.0018,;3.6019,-2.4682,;2.3988,-3.3169,;1.0621,-2.6992,;0.1062,-3.9298,;0.9288,-1.2328,;-0.5563,-0.6124,;-1.5367,-1.8,;-0.8947,0.9647,;-0.8778,2.5678,;-0.1398,3.9298,;-1.9563,3.6407,;0.5974,1.3136,;1.1268,-0.0778,;1.9954,1.9251,;-2.4534,0.7177,;-3.6019,1.737,;-3.4495,-0.4655,),wD:14.15,wU:7.7,11.13,10.14,17.18,o1:7,10,14,&1:11,17|"_smiles;
    REQUIRE(mol);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    MolDraw2DSVG drawer(600, 600);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    std::string legend = fileStem + "4";
    drawer.drawMolecule(*mol, legend);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(fileStem + "4.svg");
    outs << text;
    outs.flush();
    std::regex bond19(
        "<path class='bond-19 atom-7 atom-1' .*style='fill:#000000;"
        "fill-rule:evenodd;fill-opacity:1;stroke:#000000;");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond19),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 1);
    check_file_hash(fileStem + "4.svg");
  }
  {
    auto mol = "C1[C@@H](C=C)CCN[C@H]1C#N"_smiles;
    REQUIRE(mol);
    bool kekulize = true;
    bool addChiralHs = true;
    bool wedgeBonds = true;
    bool forceCoords = true;
    bool wavyBonds = true;
    MolDraw2DUtils::prepareMolForDrawing(*mol, kekulize, addChiralHs,
                                         wedgeBonds, forceCoords, wavyBonds);
    MolDraw2DSVG drawer(600, 600);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    std::string legend = fileStem + "5";
    drawer.drawMolecule(*mol, legend);
    drawer.finishDrawing();
    std::string text = drawer.getDrawingText();
    std::ofstream outs(fileStem + "5.svg");
    outs << text;
    outs.flush();
    std::regex bond19(
        "<path class='bond-1 atom-1 atom-2' .*style='fill:none;fill-rule:evenodd;stroke:#000000;"
        "stroke-width:1.0px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1' />");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), bond19),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 30);
    check_file_hash(fileStem + "5.svg");
  }
}

TEST_CASE("idx out of bounds should not cause a segfault") {
  auto m = "C"_smiles;
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    std::map<int, std::vector<DrawColour>> atomCols{{2, {DrawColour(0, 0, 0)}}};
    std::map<int, std::vector<DrawColour>> bondCols;
    std::map<int, double> atomRads{{2, 1.0}};
    std::map<int, int> bondMults;
    REQUIRE_THROWS_AS(
        drawer.drawMoleculeWithHighlights(*m, "nocrash", atomCols, bondCols,
                                          atomRads, bondMults),
        ValueErrorException);
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    std::map<int, std::vector<DrawColour>> atomCols;
    std::map<int, std::vector<DrawColour>> bondCols{{2, {DrawColour(0, 0, 0)}}};
    std::map<int, double> atomRads;
    std::map<int, int> bondMults;
    REQUIRE_THROWS_AS(
        drawer.drawMoleculeWithHighlights(*m, "nocrash", atomCols, bondCols,
                                          atomRads, bondMults),
        ValueErrorException);
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    std::map<int, std::vector<DrawColour>> atomCols{{0, {DrawColour(0, 0, 0)}}};
    std::map<int, std::vector<DrawColour>> bondCols;
    std::map<int, double> atomRads{{2, 1.0}};
    std::map<int, int> bondMults;
    REQUIRE_NOTHROW(drawer.drawMoleculeWithHighlights(
        *m, "nocrash", atomCols, bondCols, atomRads, bondMults));
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    std::map<int, std::vector<DrawColour>> atomCols;
    std::map<int, std::vector<DrawColour>> bondCols{{0, {DrawColour(0, 0, 0)}}};
    std::map<int, double> atomRads;
    std::map<int, int> bondMults{{2, 10}};
    REQUIRE_THROWS_AS(
        drawer.drawMoleculeWithHighlights(*m, "nocrash", atomCols, bondCols,
                                          atomRads, bondMults),
        ValueErrorException);
  }
}

TEST_CASE("Atom abbreviations clash") {
  auto m = "C(OC)C(OC)C(OC)C(OC)C(OC)C(OC)C(Cl)COC"_smiles;
  RDDepict::preferCoordGen = false;
  MolDraw2DUtils::prepareMolForDrawing(*m);
  MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
  drawer.drawOptions().explicitMethyl = true;
  drawer.drawOptions().addAtomIndices = true;
  drawer.drawOptions().baseFontSize = 1.2;
  drawer.drawMolecule(*m);
  drawer.finishDrawing();
  std::string text = drawer.getDrawingText();
  std::ofstream outs("testAtomAbbreviationsClash.svg");
  outs << text;
  outs.flush();
  // If this is worked correctly, the first 2 characters of atoms 8 and 14
  // should be above each other, and the characters of atom 22 should
  // be in increasing x, with the y of 1 and 3 (H and C) the same.
  // If this wasn't a test, this would probably be done more elegantly.
  {
    const static std::regex text8(
        "<text x='(\\d+\\.\\d+)' y='(\\d+\\.\\d+)' class='atom-8'.*</text>");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), text8),
                      std::sregex_iterator()));
    CHECK(match_count == 3);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), text8);
    std::smatch match = *match_begin;
    double x1 = stod(match[1]);
    double y1 = stod(match[2]);
    ++match_begin;
    match = *match_begin;
    double x2 = stod(match[1]);
    double y2 = stod(match[2]);
    CHECK_THAT(x1, Catch::Matchers::WithinAbs(x2, 0.1));
    CHECK(y1 > y2);
  }
  {
    const static std::regex text14(
        "<text x='(\\d+\\.\\d+)' y='(\\d+\\.\\d+)' class='atom-14'.*</text>");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), text14),
                      std::sregex_iterator()));
    CHECK(match_count == 3);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), text14);
    std::smatch match = *match_begin;
    double x1 = stod(match[1]);
    double y1 = stod(match[2]);
    ++match_begin;
    match = *match_begin;
    double x2 = stod(match[1]);
    double y2 = stod(match[2]);
    CHECK_THAT(x1, Catch::Matchers::WithinAbs(x2, 0.1));
    CHECK(y1 > y2);
  }
  {
    const static std::regex text22(
        "<text x='(\\d+\\.\\d+)' y='(\\d+\\.\\d+)' class='atom-22'.*</text>");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), text22),
                      std::sregex_iterator()));
    CHECK(match_count == 3);
    auto match_begin = std::sregex_iterator(text.begin(), text.end(), text22);
    std::smatch match = *match_begin;
    double x1 = stod(match[1]);
    double y1 = stod(match[2]);
    ++match_begin;
    ++match_begin;
    match = *match_begin;
    double x2 = stod(match[1]);
    double y2 = stod(match[2]);
    CHECK_THAT(y1, Catch::Matchers::WithinAbs(y2, 0.1));
    CHECK(x2 > x1);
  }
  check_file_hash("testAtomAbbreviationsClash.svg");
}

TEST_CASE(
    "DrawMol::getColour should not throw if the palette has no carbon color and no default color") {
  auto m = "c1ccc(C2CN2)cc1"_smiles;
  MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
  drawer.drawOptions().atomColourPalette = ColourPalette();
  std::vector<int> highlightAtoms{0, 1, 2, 3, 4, 5, 6, 7, 8};
  std::vector<int> highlightBonds;
  REQUIRE_NOTHROW(
      drawer.drawMolecule(*m, "", &highlightAtoms, &highlightBonds));
  drawer.finishDrawing();
  std::string text = drawer.getDrawingText();
  std::ofstream outs("testBlackAtomsUnderHighlight.svg");
  outs << text;
  outs.flush();
  {
    std::regex path("<path.*fill:none;.*stroke:#000000;.*/>");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), path),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 19);
  }
  {
    std::regex path("<text.*stroke:none;.*fill:#000000.*</text>");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), path),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 2);
  }
  {
    std::regex path("<ellipse.*fill:#FF7F7F;.*stroke:#FF7F7F;.*/>");
    size_t nOccurrences = std::distance(
        std::sregex_token_iterator(text.begin(), text.end(), path),
        std::sregex_token_iterator());
    CHECK(nOccurrences == 9);
  }
  check_file_hash("testBlackAtomsUnderHighlight.svg");
}

TEST_CASE(
    "Github8177 - bad conformer if prepareMolsBeforeDrawing is false and unspecifiedStereoIsUnknown is true") {
  auto m = "c1cccnc1CC"_smiles;
  REQUIRE(m);
  MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
  drawer.drawOptions().prepareMolsBeforeDrawing = false;
  drawer.drawOptions().unspecifiedStereoIsUnknown = true;
  REQUIRE_NOTHROW(drawer.drawMolecule(*m));
}

TEST_CASE("Github8195 - Reaction rendering looks odd at small scales") {
  std::string smiles =
      "[#6]1-[#6]=[#6]-[#6]=[#6]-[#6]=1-[#6:1](=[#8])-[#8]."
      "[#1:7]-[#7:4](-[#1,#6:5])-[#1,#6:6]>>"
      "[#6]1(-[#6:1](-[#7:4](-[#1,#6:5])-[#1,#6:6])"
      "=[#8])-[#6]=[#6]-[#6]=[#6]-[#6]=1";
  bool useSmiles = false;
  std::unique_ptr<ChemicalReaction> rxn(
      RxnSmartsToChemicalReaction(smiles, nullptr, useSmiles));
  REQUIRE(rxn);
  MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
  drawer.drawReaction(*rxn);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("testSmallReactionCanvas.svg");
  outs << text;
  outs.close();
  std::regex path("font-size:6px");
  size_t nOccurrences =
      std::distance(std::sregex_token_iterator(text.begin(), text.end(), path),
                    std::sregex_token_iterator());
  CHECK(nOccurrences == 38);
  check_file_hash("testSmallReactionCanvas.svg");
#ifdef RDK_BUILD_CAIRO_SUPPORT
  SECTION("PNG for visual inspection") {
    {
      MolDraw2DCairo drawer(300, 300);
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      drawer.writeDrawingText("testSmallReactionCanvas.png");
    }
  }
#endif
}

TEST_CASE("Github8209 - Reaction products not having bond corners smoothed") {
  std::string smiles =
      "[#6]1-[#6]=[#6]-[#6]=[#6]-[#6]=1-[#6:1](=[#8])-[#8]."
      "[#1:7]-[#7:4](-[#1,#6:5])-[#1,#6:6]>>"
      "[#6]1(-[#6:1](-[#7:4](-[#1,#6:5])-[#1,#6:6])"
      "=[#8])-[#6]=[#6]-[#6]=[#6]-[#6]=1";
  bool useSmiles = false;
  std::unique_ptr<ChemicalReaction> rxn(
      RxnSmartsToChemicalReaction(smiles, nullptr, useSmiles));
  REQUIRE(rxn);
  MolDraw2DSVG drawer(450, 200, -1, -1, NO_FREETYPE);
  drawer.drawReaction(*rxn);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("testReactionProductSmoothCorners.svg");
  outs << text;
  outs.close();
  std::regex path(
      "<path d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)' style='fill:none;stroke:#000000");
  size_t nOccurrences =
      std::distance(std::sregex_token_iterator(text.begin(), text.end(), path),
                    std::sregex_token_iterator());
  // There's one for 5 corners on each benzene, and now one on the arrowhead.
  CHECK(nOccurrences == 11);
  check_file_hash("testReactionProductSmoothCorners.svg");
}

TEST_CASE("Optional brackets round atom lists in queries and reactions.") {
  std::string baseName = "testOptionalAtomListBrackets";
  auto checkTextChar = [](const std::string &svgText,
                          const std::string &searchChar,
                          size_t expected) -> void {
    {
      std::regex regex("<text .* >" + searchChar + "</text>");
      size_t nOccurrences = std::distance(
          std::sregex_token_iterator(svgText.begin(), svgText.end(), regex),
          std::sregex_token_iterator());
      CHECK(nOccurrences == expected);
    }
  };
  {
    std::string smiles =
        "[#6]1-[#6]=[#6]-[#6]=[#6]-[#6]=1-[#6:1](=[#8])-[#8]."
        "[#1:7]-[#7:4](-[#1,#6:5])-[#1,#6:6]>>"
        "[#6]1(-[#6:1](-[#7:4](-[#1,#6:5])-[#1,#6:6])"
        "=[#8])-[#6]=[#6]-[#6]=[#6]-[#6]=1";
    bool useSmiles = false;
    std::unique_ptr<ChemicalReaction> rxn(
        RxnSmartsToChemicalReaction(smiles, nullptr, useSmiles));
    REQUIRE(rxn);
    MolDraw2DSVG drawer(600, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().bracketsAroundAtomLists = false;
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs(baseName + "_1.svg");
    outs << text;
    outs.close();
    checkTextChar(text, R"(\[)", 0);
    checkTextChar(text, R"(\])", 0);
    check_file_hash(baseName + "_1.svg");
  }
  {
    auto m = "c1ccccc1[F,Cl,Br,I,At]"_smarts;
    REQUIRE(m);
    MolDraw2DSVG drawer(600, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().bracketsAroundAtomLists = false;
    drawer.drawOptions().useComplexQueryAtomSymbols = false;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs(baseName + "_2.svg");
    outs << text;
    outs.close();
    checkTextChar(text, R"(\[)", 0);
    checkTextChar(text, R"(\])", 0);
    check_file_hash(baseName + "_2.svg");
  }
  {
    // Demonstrate that the complex query atom symbols aren't stuffed up by
    // this change.
    auto m = "c1ccccc1[F,Cl,Br,I,At]"_smarts;
    REQUIRE(m);
    MolDraw2DSVG drawer(600, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().bracketsAroundAtomLists = false;
    drawer.drawOptions().useComplexQueryAtomSymbols = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs(baseName + "_3.svg");
    outs << text;
    outs.close();
    checkTextChar(text, R"(\[)", 0);
    checkTextChar(text, R"(\])", 0);
    checkTextChar(text, "X", 1);
    check_file_hash(baseName + "_3.svg");
  }
}

TEST_CASE("Github8213 - Reaction rendering ignores panels") {
  std::string smiles =
      "[#6]1-[#6]=[#6]-[#6]=[#6]-[#6]=1-[#6:1](=[#8])-[#8]."
      "[#1:7]-[#7:4](-[#1,#6:5])-[#1,#6:6]>>"
      "[#6]1(-[#6:1](-[#7:4](-[#1,#6:5])-[#1,#6:6])"
      "=[#8])-[#6]=[#6]-[#6]=[#6]-[#6]=1";
  bool useSmiles = false;
  std::unique_ptr<ChemicalReaction> rxn(
      RxnSmartsToChemicalReaction(smiles, nullptr, useSmiles));
  REQUIRE(rxn);
  MolDraw2DSVG drawer(600, 300, 300, 150, NO_FREETYPE);
  drawer.drawReaction(*rxn);
  drawer.setOffset(300, 150);
  drawer.drawReaction(*rxn);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("testReactionPanels.svg");
  outs << text;
  outs.close();
  const static std::regex atom0(
      "<text x='(\\d+\\.\\d+)' y='(\\d+\\.\\d+)' class='atom-0'.*</text>");
  std::ptrdiff_t const match_count(
      std::distance(std::sregex_iterator(text.begin(), text.end(), atom0),
                    std::sregex_iterator()));
  CHECK(match_count == 6);
  auto match_begin = std::sregex_iterator(text.begin(), text.end(), atom0);
  std::smatch match = *match_begin;
  double x1 = stod(match[1]);
  double y1 = stod(match[2]);
  CHECK(x1 < 300.0);
  CHECK(y1 < 150.0);
  ++match_begin;
  ++match_begin;
  ++match_begin;
  match = *match_begin;
  double x2 = stod(match[1]);
  double y2 = stod(match[2]);
  CHECK((x2 > 300.0 && x2 < 600.0));
  CHECK((y2 > 150.0 && y2 < 300.0));
  check_file_hash("testReactionPanels.svg");
}

TEST_CASE("Optionally increase padding round components in reaction drawing") {
  // No specific tests on the output, because this was an enhancement not
  // a bug fix.
  {
    std::string smiles =
        "[cH:5]1[cH:6][c:7]2[cH:8][n:9][cH:10][cH:11][c:12]2[c:3]([cH:4]1)[C:2]"
        "(=[O:1])O.[N-:13]=[N+:14]=[N-:15]>C(Cl)Cl.C(=O)(C(=O)Cl)Cl>[cH:5]1["
        "cH:6][c:7]2[cH:8][n:9][cH:10][cH:11][c:12]2[c:3]([cH:4]1)[C:2](=[O:1])"
        "[N:13]=[N+:14]=[N-:15]";
    bool useSmiles = false;
    std::unique_ptr<ChemicalReaction> rxn(
        RxnSmartsToChemicalReaction(smiles, nullptr, useSmiles));
    REQUIRE(rxn);
    MolDraw2DSVG drawer(900, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().componentPadding = 0.0;
    drawer.drawReaction(*rxn);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testComponentPadding_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testComponentPadding_1.svg");
  }
  {
    std::string smiles =
        "[cH:5]1[cH:6][c:7]2[cH:8][n:9][cH:10][cH:11][c:12]2[c:3]([cH:4]1)[C:2]"
        "(=[O:1])O.[N-:13]=[N+:14]=[N-:15]>C(Cl)Cl.C(=O)(C(=O)Cl)Cl>[cH:5]1["
        "cH:6][c:7]2[cH:8][n:9][cH:10][cH:11][c:12]2[c:3]([cH:4]1)[C:2](=[O:1])"
        "[N:13]=[N+:14]=[N-:15]";
    bool useSmiles = false;
    std::unique_ptr<ChemicalReaction> rxn(
        RxnSmartsToChemicalReaction(smiles, nullptr, useSmiles));
    REQUIRE(rxn);
    {
      MolDraw2DSVG drawer(900, 300, -1, -1, NO_FREETYPE);
      drawer.drawOptions().componentPadding = 0.25;
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testComponentPadding_2.svg");
      outs << text;
      outs.close();
      check_file_hash("testComponentPadding_2.svg");
    }
#ifdef RDK_BUILD_CAIRO_SUPPORT
    // For a visual check.
    {
      MolDraw2DCairo drawer(900, 300, -1, -1, NO_FREETYPE);
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      drawer.writeDrawingText("testComponentPadding_2.png");
      drawer.drawOptions().componentPadding = 0.1;
      drawer.drawOptions().bondLineWidth = 2.0;
      drawer.drawReaction(*rxn);
      drawer.finishDrawing();
      auto text = drawer.getDrawingText();
      std::ofstream outs("testComponentPadding_2.png");
      outs << text;
      outs.close();
    }
#endif
  }
}

TEST_CASE("atom and bond label colors") {
  auto m = "c1ncccc1CCCc1ccccc1"_smiles;
  REQUIRE(m);

  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAtomAndBondLabels_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomAndBondLabels_1.svg");
    CHECK(text.find("fill:#000000' >1</text>") != std::string::npos);
    CHECK(text.find("fill:#7F7FFF' >1</text>") != std::string::npos);
  }

  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    drawer.drawOptions().bondNoteColour = DrawColour(0, 0, 1.);
    drawer.drawOptions().atomNoteColour = DrawColour(1., 0, 1.);

    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAtomAndBondLabels_2.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomAndBondLabels_2.svg");
    CHECK(text.find("fill:#FF00FF' >1</text>") != std::string::npos);
    CHECK(text.find("fill:#0000FF' >1</text>") != std::string::npos);
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    setDarkMode(drawer.drawOptions());
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAtomAndBondLabels_3.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomAndBondLabels_3.svg");
    CHECK(text.find("fill:#E5E5E5' >1</text>") != std::string::npos);
    CHECK(text.find("fill:#7F7FFF' >1</text>") != std::string::npos);
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().addAtomIndices = true;
    drawer.drawOptions().addBondIndices = true;
    setMonochromeMode(drawer.drawOptions(), DrawColour(0.1, 0.1, 0.1),
                      DrawColour(0.9, 0.9, 0.9));
    drawer.drawMolecule(*m);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testAtomAndBondLabels_4.svg");
    outs << text;
    outs.close();
    check_file_hash("testAtomAndBondLabels_4.svg");
    CHECK(text.find("fill:#191919' >1</text>") != std::string::npos);
    // check for a second occurrence of the same text since atoms and bonds are
    // the same color
    CHECK(text.find("fill:#191919' >1</text>",
                    text.find("fill:#191919' >1</text>") + 1) !=
          std::string::npos);
  }
}

TEST_CASE("standard colours for highlighted atoms") {
  auto m = "N#Cc1cc(Cl)cc(c1)Oc1c(=O)n(ccc1C(F)(F)F)Cc1n[nH]c(=O)n1C"_smiles;
  REQUIRE(m);
  std::vector<int> highlightAtoms{22, 23, 24, 25, 26, 27, 28};
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawMolecule(*m, &highlightAtoms);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testStandardColoursHighlightedAtoms_1.svg");
    outs << text;
    outs.close();
    check_file_hash("testStandardColoursHighlightedAtoms_1.svg");
    const static std::regex atoms(
        "<text x=.*class='atom-2[3-7]'.*#000000' >[ONH]</text>");
    std::ptrdiff_t const match_count(
        std::distance(std::sregex_iterator(text.begin(), text.end(), atoms),
                      std::sregex_iterator()));
    CHECK(match_count == 5);
  }
  {
    MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
    drawer.drawOptions().standardColoursForHighlightedAtoms = true;
    drawer.drawMolecule(*m, &highlightAtoms);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream outs("testStandardColoursHighlightedAtoms_2.svg");
    outs << text;
    outs.close();
    check_file_hash("testStandardColoursHighlightedAtoms_2.svg");
    const static std::regex ns(
        "<text x=.*class='atom-2[3-7]'.*#0000FF' >N</text>");
    std::ptrdiff_t const match_count_ns(
        std::distance(std::sregex_iterator(text.begin(), text.end(), ns),
                      std::sregex_iterator()));
    CHECK(match_count_ns == 3);
    const static std::regex os(
        "<text x=.*class='atom-2[3-7]'.*#FF0000' >O</text>");
    std::ptrdiff_t const match_count_os(
        std::distance(std::sregex_iterator(text.begin(), text.end(), os),
                      std::sregex_iterator()));
    CHECK(match_count_os == 1);
    const static std::regex hs(
        "<text x=.*class='atom-2[3-7]'.*#0000FF' >H</text>");
    std::ptrdiff_t const match_count_hs(
        std::distance(std::sregex_iterator(text.begin(), text.end(), hs),
                      std::sregex_iterator()));
    CHECK(match_count_hs == 1);
  }
}

TEST_CASE("drawString() uses drawColour") {
  auto m = "CCC"_smiles;
  REQUIRE(m);
  MolDraw2DSVG drawer(300, 300, -1, -1, NO_FREETYPE);
  drawer.drawMolecule(*m);
  drawer.drawString("default Z", RDGeom::Point2D(100, 20), true);
  drawer.setColour(DrawColour(0.3, 0.3, 1.0));
  drawer.drawString("blue X", RDGeom::Point2D(100, 200), true);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("testDrawTextColour.svg");
  outs << text;
  outs.close();
  // The default color:
  CHECK(text.find("#000000' >Z</text>") != std::string::npos);
  // The blue color:
  CHECK(text.find("#4C4CFF' >X</text>") != std::string::npos);
}

TEST_CASE("Solid arrowhead in wrong place (Github 8500)") {
  MolDraw2DSVG drawer(300, 300);
  drawer.setColour(DrawColour(1.0, 0.0, 0.0));
  drawer.drawLine(Point2D{50.0, 50.0}, Point2D{250.0, 50.0}, true);
  drawer.drawLine(Point2D{250.0, 50.0}, Point2D{250.0, 250.0}, true);
  drawer.drawLine(Point2D{250.0, 250.0}, Point2D{50.0, 250.0}, true);
  drawer.drawLine(Point2D{50.0, 50.0}, Point2D{50.0, 250.0}, true);
  drawer.setColour(DrawColour(0.0, 1.0, 0.0));
  drawer.setLineWidth(8);
  drawer.drawArrow(Point2D{150.0, 150.0}, Point2D{250.0, 250.0}, true, 0.05,
                   M_PI / 4, DrawColour(0.0, 1.0, 0.0), true);
  drawer.drawArrow(Point2D{150.0, 150.0}, Point2D{50.0, 50.0}, false, 0.05,
                   M_PI / 4, DrawColour(0.0, 1.0, 0.0), true);
  drawer.setLineWidth(2);
  drawer.drawArrow(Point2D{150.0, 150.0}, Point2D{250.0, 50.0}, true, 0.05,
                   M_PI / 4, DrawColour(0.0, 1.0, 0.0), true);
  drawer.drawArrow(Point2D{150.0, 150.0}, Point2D{50.0, 250.0}, false, 0.05,
                   M_PI / 4, DrawColour(0.0, 1.0, 0.0), true);
  drawer.finishDrawing();

  auto text = drawer.getDrawingText();
  std::ofstream outs("testArrowheads.svg");
  outs << text;
  outs.close();
  // Checking that the line ends are where they were in an SVG that looked
  // right on visual inspection.
  const static std::regex heads(
      "<path d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+).*00FF00");
  std::ptrdiff_t const match_count_heads(
      std::distance(std::sregex_iterator(text.begin(), text.end(), heads),
                    std::sregex_iterator()));
  CHECK(match_count_heads == 4);
  auto match_begin = std::sregex_iterator(text.begin(), text.end(), heads);
  std::smatch match = *match_begin;
  std::vector<std::pair<double, double>> expVals{
      {246.0, 246.0},
      {54.0, 54.0},
      {249.0, 51.0},
      {51.0, 249.0},
  };
  for (int i = 0; i < 4; ++i, ++match_begin) {
    std::smatch match = *match_begin;
    CHECK_THAT(std::stod(match[3]),
               Catch::Matchers::WithinAbs(expVals[i].first, 1.0e-4));
    CHECK_THAT(std::stod(match[4]),
               Catch::Matchers::WithinAbs(expVals[i].second, 1.0e-4));
  }
  check_file_hash("testArrowheads.svg");
}

TEST_CASE("Show all CIP codes (Github 8561)") {
  auto m = R"CTAB(
     RDKit          2D

  0  0  0  0  0  0  0  0  0  0999 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 19 20 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 3.000000 0.000000 0.000000 0
M  V30 2 C 1.500000 0.000000 0.000000 0
M  V30 3 C 0.750000 -1.299038 0.000000 0
M  V30 4 C -0.750000 -1.299038 0.000000 0
M  V30 5 C -1.500000 0.000000 0.000000 0
M  V30 6 C -0.750000 1.299038 0.000000 0
M  V30 7 F -1.500000 2.598076 0.000000 0
M  V30 8 C 0.750000 1.299038 0.000000 0
M  V30 9 C 1.500000 2.598076 0.000000 0
M  V30 10 C 3.000000 2.598076 0.000000 0
M  V30 11 C 3.750000 1.299038 0.000000 0
M  V30 12 C 3.750000 3.897114 0.000000 0
M  V30 13 C 3.000000 5.196152 0.000000 0
M  V30 14 C 3.750000 6.495191 0.000000 0
M  V30 15 C 5.250000 6.495191 0.000000 0
M  V30 16 O 3.000000 7.794229 0.000000 0
M  V30 17 C 1.500000 5.196152 0.000000 0
M  V30 18 C 0.750000 3.897114 0.000000 0
M  V30 19 Cl -0.750000 3.897114 0.000000 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 1 1 2
M  V30 2 2 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 5 6
M  V30 6 1 6 7
M  V30 7 2 6 8
M  V30 8 1 8 9
M  V30 9 2 9 10
M  V30 10 1 10 11
M  V30 11 1 10 12
M  V30 12 2 12 13
M  V30 13 1 13 14
M  V30 14 1 14 15 CFG=1
M  V30 15 1 14 16
M  V30 16 1 13 17
M  V30 17 2 17 18
M  V30 18 1 18 19
M  V30 19 1 8 2 CFG=3
M  V30 20 1 18 9
M  V30 END BOND
M  V30 BEGIN COLLECTION
M  V30 MDLV30/STEREL1 ATOMS=(1 8)
M  V30 MDLV30/STERAC1 ATOMS=(1 14)
M  V30 END COLLECTION
M  V30 END CTAB
M  END
)CTAB"_ctab;
  REQUIRE(m);
  CIPLabeler::assignCIPLabels(*m);
  MolDraw2DSVG drawer(350, 300);
  drawer.drawOptions().addStereoAnnotation = true;
  drawer.drawOptions().showAllCIPCodes = true;
  drawer.drawMolecule(*m);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("testShowAllCIPLabels.svg");
  outs << text;
  outs.close();

  // Check for Blue (M) CIP label on Bond
  TEST_ASSERT(text.find("class='CIP_Code'") != std::string::npos);

  // try again, this tiem using JSON to set options
  const char *json = "{\"addStereoAnnotation\":true, \"showAllCIPCodes\":true}";
  MolDraw2DSVG drawer2(350, 300);
  MolDrawOptions opts;
  MolDraw2DUtils::updateMolDrawOptionsFromJSON(opts, json);
  drawer2.drawOptions() = opts;
  drawer2.drawMolecule(*m);
  drawer2.finishDrawing();
  auto text2 = drawer2.getDrawingText();
  std::ofstream outs2("testShowAllCIPLabels2.svg");
  outs2 << text2;
  outs2.close();

  // Check for Blue (M) CIP label on Bond
  TEST_ASSERT(text2.find("class='CIP_Code'") != std::string::npos);
}

TEST_CASE("Github 8679 - DrawMoleculesWithHighlights doesn't offset") {
  auto mol1 = "c1ccccc1Cl"_smiles;
  REQUIRE(mol1);
  auto mol2 = "c1ccccc1Br"_smiles;
  REQUIRE(mol2);
  MolDraw2DSVG drawer(600, 300, 300, 300, true);
  drawer.drawOptions().addAtomIndices = true;
  std::map<int, std::vector<DrawColour>> atomCols;
  std::map<int, double> atomRads;
  std::map<int, int> bondMults;
  std::map<int, std::vector<DrawColour>> bondCols;

  drawer.drawMoleculeWithHighlights(*mol1, "", atomCols, bondCols, atomRads,
                                    bondMults);
  drawer.setOffset(300, 0);
  drawer.drawMoleculeWithHighlights(*mol2, "", atomCols, bondCols, atomRads,
                                    bondMults);
  drawer.finishDrawing();
  auto text = drawer.getDrawingText();
  std::ofstream outs("testOffsetHighlightedMols.svg");
  outs << text;
  outs.close();
  const static std::regex atom6(
      "<text x='(\\d+\\.\\d+)' y='(\\d+\\.\\d+)' class='atom-6'.*</text>");
  std::ptrdiff_t const match_count(
      std::distance(std::sregex_iterator(text.begin(), text.end(), atom6),
                    std::sregex_iterator()));

  // There are 4 characters for the 2 atom 6s.  Check that the 1st and 3rd
  // are in different panels, by x coord.
  CHECK(match_count == 4);
  auto match_begin = std::sregex_iterator(text.begin(), text.end(), atom6);
  std::smatch match = *match_begin;
  double x1 = stod(match[1]);
  CHECK(x1 < 300.0);
  ++match_begin;
  ++match_begin;
  match = *match_begin;
  double x2 = stod(match[1]);
  CHECK((x2 > 300.0 && x2 < 600.0));
  check_file_hash("testOffsetHighlightedMols.svg");
}

TEST_CASE("Lasso Highlights Throw Exception") {
  auto m = R"CTAB(From_EN300-13775
     RDKit          2D

 27 30  0  0  0  0  0  0  0  0999 V2000
    0.7500   -6.4952    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5000   -5.1962    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.0000   -5.1962    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5000   -7.7942    0.0000 Cl  0  0  0  0  0  0  0  0  0  0  0  0
    0.7500   -3.8971    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5000   -2.5981    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7500   -3.8971    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7500   -1.2990    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5000   -2.5981    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7500   -1.2990    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    1.5000    0.0000    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.9266   -2.1346    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -1.5000    0.0000    0.0000 N   0  0  0  0  0  0  0  0  0  0  0  0
    0.7500    1.2990    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -2.9266   -0.6346    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7500    1.2990    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -4.1401    0.2471    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.7500   -6.4952    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.0000   -7.7942    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.2500   -6.4952    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.7500   -9.0933    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    6.0000   -7.7942    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    5.2500   -9.0933    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    3.0000  -10.3923    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    7.5000   -7.7942    0.0000 R   0  0  0  0  0  1  0  0  0  0  0  0
    1.5000  -10.3923    0.0000 O   0  0  0  0  0  0  0  0  0  0  0  0
    3.7500  -11.6913    0.0000 R   0  0  0  0  0  1  0  0  0  0  0  0
  1  2  1  0
  2  3  2  3
  1  4  1  0
  2  5  1  0
  5  6  2  0
  7  5  1  0
  6  8  1  0
  9  7  2  0
  8 10  2  0
 11  8  1  0
 10  9  1  0
  9 12  1  0
 13 10  1  0
 14 11  1  0
 12 15  1  0
 15 13  1  0
 13 16  1  0
 16 14  1  0
 15 17  2  0
 18  3  1  0
 19 18  2  0
 18 20  1  0
 21 19  1  0
 20 22  2  0
 23 21  2  0
 21 24  1  0
 22 25  1  0
 22 23  1  0
 24 26  2  0
 24 27  1  0
M  ISO  2  25   3  27   2
M  END
)CTAB"_ctab;
  REQUIRE(m);
  std::map<int, std::vector<DrawColour>> ha_map;
  for (auto i : std::vector<int>{0, 1, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
                                 15, 16}) {
    ha_map.insert(std::make_pair(i, std::vector{DrawColour(1.0, 0.0, 0.25)}));
  }
  std::map<int, std::vector<DrawColour>> hb_map;
  std::map<int, double> h_rads;
  std::map<int, int> h_lw_mult;
  MolDraw2DSVG drawer(300, 300, 0, 0, false);
  drawer.drawOptions().multiColourHighlightStyle =
      RDKit::MultiColourHighlightStyle::LASSO;
  REQUIRE_NOTHROW(drawer.drawMoleculeWithHighlights(*m, "Lasso 1", ha_map,
                                                    hb_map, h_rads, h_lw_mult));
}

TEST_CASE("drawingExtentsInclude") {
  auto m = R"CTAB(
     RDKit          2D

  3  3  0  0  0  0  0  0  0  0999 V2000
    0.0000    0.8930    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
    0.7734   -0.4465    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
   -0.7734   -0.4465    0.0000 C   0  0  0  0  0  0  0  0  0  0  0  0
  1  2  1  0
  2  3  1  0
  1  3  1  0
M  END
)CTAB"_ctab;
  INT_VECT highlightAtoms = {0};
  REQUIRE(m);
  std::unique_ptr<MolDraw2DSVG> drawer;
  std::regex coordRegex(
      "<path class='bond-\\d atom-\\d atom-\\d' d='M (\\d+\\.\\d+),(\\d+\\.\\d+) L (\\d+\\.\\d+),(\\d+\\.\\d+)'");
  auto resetDrawer = [](std::unique_ptr<MolDraw2DSVG> &drawer) {
    drawer.reset(new MolDraw2DSVG(300, 200, -1, -1, NO_FREETYPE));
    drawer->drawOptions().padding = 0.2;
  };
  auto extractCoords = [coordRegex](
                           const std::string &text,
                           std::vector<std::vector<double>> &coordVec) {
    coordVec.clear();
    for (auto it = std::sregex_iterator(text.begin(), text.end(), coordRegex);
         it != std::sregex_iterator(); ++it) {
      std::smatch match = *it;
      std::vector<double> coords(match.size());
      for (size_t i = 1; i < match.size(); ++i) {
        coords.push_back(stod(match[i]));
      }
      coordVec.push_back(std::move(coords));
    }
  };
  auto checkCoords =
      [](const std::vector<std::vector<double>> &referenceCoords,
         const std::vector<std::vector<double>> &highlightCoords) {
        for (size_t i = 0; i < referenceCoords.size(); ++i) {
          CHECK(referenceCoords[i].size() == highlightCoords[i].size());
          for (size_t j = 0; j < referenceCoords[i].size(); ++j) {
            if (fabs(highlightCoords[i][j]) - referenceCoords[i][j] > 0.1) {
              return false;
            }
          }
        }
        return true;
      };
  std::vector<std::vector<double>> referenceCoords;
  std::vector<std::vector<double>> highlightCoords;
  SECTION("default") {
    {
      resetDrawer(drawer);
      drawer->drawMolecule(*m);
      drawer->finishDrawing();
      auto text = drawer->getDrawingText();
      extractCoords(text, referenceCoords);
      std::ofstream outs("testDrawingExtentsInclude_default.svg");
      outs << text;
      outs.close();
      check_file_hash("testDrawingExtentsInclude_default.svg");
    }
    {
      resetDrawer(drawer);
      drawer->drawMolecule(*m, &highlightAtoms);
      drawer->finishDrawing();
      auto text = drawer->getDrawingText();
      extractCoords(text, highlightCoords);
      std::ofstream outs("testDrawingExtentsIncludeWithHighlights_default.svg");
      outs << text;
      outs.close();
      check_file_hash("testDrawingExtentsIncludeWithHighlights_default.svg");
    }
    CHECK(!checkCoords(referenceCoords, highlightCoords));
  }
  SECTION("allButHighlights") {
    {
      resetDrawer(drawer);
      drawer->drawMolecule(*m);
      drawer->finishDrawing();
      auto text = drawer->getDrawingText();
      extractCoords(text, referenceCoords);
      std::ofstream outs("testDrawingExtentsInclude_allButHighlights.svg");
      outs << text;
      outs.close();
      check_file_hash("testDrawingExtentsInclude_allButHighlights.svg");
    }
    {
      resetDrawer(drawer);
      drawer->drawOptions().drawingExtentsInclude =
          DrawElement::ALL ^ DrawElement::HIGHLIGHTS;
      drawer->drawMolecule(*m, &highlightAtoms);
      drawer->finishDrawing();
      auto text = drawer->getDrawingText();
      extractCoords(text, highlightCoords);
      std::ofstream outs(
          "testDrawingExtentsIncludeWithHighlights_allButHighlights.svg");
      outs << text;
      outs.close();
      check_file_hash(
          "testDrawingExtentsIncludeWithHighlights_allButHighlights.svg");
    }
    CHECK(checkCoords(referenceCoords, highlightCoords));
  }
}

TEST_CASE("Github 9280 - font scaling bug") {
  auto mol = "CC(C)Oc1ccc(N2CCc3nccc(C(=O)Nc4ccccn4)c3C2)nc1"_smiles;
  {
    MolDraw2DSVG drawer(358, 290, -1, -1, NO_FREETYPE);
    drawer.drawOptions().baseFontSize = 1.0;
    drawer.drawMolecule(*mol);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream ofs("test_Github9280_1.0.svg");
    ofs << text;
    ofs.close();
    // With the bug, it snapped to maximum font size, 40 pixels.
    CHECK(text.find("font-size:40px") == std::string::npos);
    CHECK(text.find("font-size:24px") != std::string::npos);
    check_file_hash("test_Github9280_1.0.svg");
  }
  {
    // Check it still maxes out at 40 - font size would be 50 without.
    MolDraw2DSVG drawer(358, 290, -1, -1, NO_FREETYPE);
    drawer.drawOptions().baseFontSize = 2.0;
    drawer.drawMolecule(*mol);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream ofs("test_Github9280_2.0.svg");
    ofs << text;
    ofs.close();
    CHECK(text.find("font-size:40px") != std::string::npos);
    check_file_hash("test_Github9280_2.0.svg");
  }
  {
    MolDraw2DSVG drawer(358, 290, -1, -1, NO_FREETYPE);
    drawer.drawOptions().baseFontSize = 0.3;
    drawer.drawMolecule(*mol);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream ofs("test_Github9280_0.3.svg");
    ofs << text;
    ofs.close();
    // With the bug, it snapped to minimum font size, 6 pixels.
    CHECK(text.find("font-size:6px") == std::string::npos);
    CHECK(text.find("font-size:7px") != std::string::npos);
    check_file_hash("test_Github9280_0.3.svg");
  }
  {
    MolDraw2DSVG drawer(358, 290, -1, -1, NO_FREETYPE);
    drawer.drawOptions().baseFontSize = 0.2;
    drawer.drawMolecule(*mol);
    drawer.finishDrawing();
    auto text = drawer.getDrawingText();
    std::ofstream ofs("test_Github9280_0.2.svg");
    ofs << text;
    ofs.close();
    // This should be the minimum font size
    CHECK(text.find("font-size:6px") != std::string::npos);
    check_file_hash("test_Github9280_0.2.svg");
  }
}