Function TEST

CPP/Tests/TestRandomPaths.cpp:42–83

  return result;
}
TEST(Clipper2Tests, TestRandomPaths)
{
  std::default_random_engine rng(42);
#if DEBUG
  for (int i = 0; i < 10; ++i)
#else
  for (int i = 0; i < 750; ++i)
#endif
  {
    const auto max_complexity = std::max(1, i / 10);
    const auto subject      = GenerateRandomPaths(rng, 1, max_complexity);
    const auto subject_open = GenerateRandomPaths(rng, 0, max_complexity);
    const auto clip         = GenerateRandomPaths(rng, 0, max_complexity);
    const Clipper2Lib::ClipType ct = static_cast<Clipper2Lib::ClipType>(GenerateRandomInt(rng, 0, 4));
    const Clipper2Lib::FillRule fr = static_cast<Clipper2Lib::FillRule>(GenerateRandomInt(rng, 0, 3));
    //SaveInputToFile(subject, subject_open, clip, ct, fr);
    Clipper2Lib::Paths64 solution, solution_open;
    Clipper2Lib::Clipper64 c;
    c.AddSubject(subject);
    c.AddOpenSubject(subject_open);
    c.AddClip(clip);
    c.Execute(ct, fr, solution, solution_open);
    const int64_t area_paths = static_cast<int64_t>(Area(solution));
    const int64_t count_paths = solution.size() + solution_open.size();
    Clipper2Lib::PolyTree64 solution_polytree;
    Clipper2Lib::Paths64 solution_polytree_open;
    Clipper2Lib::Clipper64 clipper_polytree;
    clipper_polytree.AddSubject(subject);
    clipper_polytree.AddOpenSubject(subject_open);
    clipper_polytree.AddClip(clip);
    clipper_polytree.Execute(ct, fr, solution_polytree, solution_polytree_open);
    const auto solution_polytree_paths = PolyTreeToPaths64(solution_polytree);
    const int64_t area_polytree = static_cast<int64_t>(Area(solution_polytree_paths));
    const int64_t count_polytree = solution_polytree_paths.size() + solution_polytree_open.size();
    EXPECT_EQ(area_paths, area_polytree);
    // polytree does an additional bounds check on each path
    // and discards paths with empty bounds, so count_polytree
    // may on occasions be slightly less than count_paths even
    // though areas match
    //EXPECT_LE(count_paths - count_polytree, 2);
  }
}