Repo created

libs/routing/routing_integration_tests/road_graph_tests.cpp

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+#include "testing/testing.hpp"
+
+#include "platform/local_country_file.hpp"
+
+#include "geometry/mercator.hpp"
+#include "geometry/point2d.hpp"
+
+#include "indexer/classificator_loader.hpp"
+#include "indexer/data_source.hpp"
+#include "indexer/feature_altitude.hpp"
+#include "indexer/mwm_set.hpp"
+
+#include "routing/features_road_graph.hpp"
+#include "routing/road_graph.hpp"
+#include "routing_common/car_model.hpp"
+
+#include "routing/routing_integration_tests/routing_test_tools.hpp"
+
+#include "geometry/point_with_altitude.hpp"
+
+#include <memory>
+#include <utility>
+#include <vector>
+
+using namespace routing;
+using namespace integration;
+
+// The test on combinatorial explosion of number of fake edges at FeaturesRoadGraph.
+// It might happen when a lot of roads intersect at one point. For example,
+// https://www.openstreetmap.org/#map=19/50.73197/-1.21295
+UNIT_TEST(FakeEdgesCombinatorialExplosion)
+{
+  classificator::Load();
+
+  std::vector<LocalCountryFile> localFiles;
+  GetAllLocalFiles(localFiles);
+  TEST(!localFiles.empty(), ());
+
+  FrozenDataSource dataSource;
+  for (auto const & file : localFiles)
+    dataSource.Register(file);
+
+  MwmDataSource routingSource(dataSource, nullptr /* numMwmIDs */);
+  FeaturesRoadGraph graph(routingSource, IRoadGraph::Mode::ObeyOnewayTag,
+                          std::make_shared<CarModelFactory>(CountryParentNameGetterFn()));
+  geometry::PointWithAltitude const j(m2::PointD(mercator::FromLatLon(50.73208, -1.21279)),
+                                      geometry::kDefaultAltitudeMeters);
+  std::vector<std::pair<routing::Edge, geometry::PointWithAltitude>> sourceVicinity;
+  graph.FindClosestEdges(mercator::RectByCenterXYAndSizeInMeters(j.GetPoint(), FeaturesRoadGraph::kClosestEdgesRadiusM),
+                         20 /* count */, sourceVicinity);
+  // In case of the combinatorial explosion mentioned above all the memory was consumed for
+  // FeaturesRoadGraph::m_fakeIngoingEdges and FeaturesRoadGraph::m_fakeOutgoingEdges fields.
+  graph.AddFakeEdges(j, sourceVicinity);
+}