Hook up small component locations for Nearest response test

unit_tests/library/coordinates.hpp

@@ -20,8 +20,7 @@ inline Location get_dummy_location()
 
 inline Locations get_locations_in_small_component()
 {
-    return {{Longitude{7.437246}, Latitude{43.747225}},
+    return {{Longitude{7.438023}, Latitude{43.746465}},
-            {Longitude{7.438023}, Latitude{43.746465}},
             {Longitude{7.439263}, Latitude{43.746543}},
             {Longitude{7.438190}, Latitude{43.747560}}};
 }

unit_tests/library/nearest.cpp

@@ -79,4 +79,38 @@ BOOST_AUTO_TEST_CASE(test_nearest_response_multiple_coordinates)
     BOOST_CHECK_EQUAL(code, "InvalidOptions");
 }
 
+BOOST_AUTO_TEST_CASE(test_nearest_response_for_location_in_small_component)
+{
+    const auto args = get_args();
+    auto osrm = get_osrm(args.at(0));
+
+    using namespace osrm;
+
+    const auto locations = get_locations_in_small_component();
+
+    NearestParameters params;
+    params.coordinates.push_back(locations.at(0));
+    params.number_of_results = 3;
+
+    json::Object result;
+    const auto rc = osrm.Nearest(params, result);
+    BOOST_REQUIRE(rc == Status::Ok);
+
+    const auto code = result.values.at("code").get<json::String>().value;
+    BOOST_CHECK_EQUAL(code, "ok");
+
+    const auto &waypoints = result.values.at("waypoints").get<json::Array>().values;
+    BOOST_CHECK(!waypoints.empty());
+
+    for (const auto &waypoint : waypoints)
+    {
+        const auto &waypoint_object = waypoint.get<json::Object>();
+
+        // Everything within ~20m (actually more) is still in small component.
+        // Nearest service should snap to road network without considering components.
+        const auto distance = waypoint_object.values.at("distance").get<json::Number>().value;
+        BOOST_CHECK_LT(distance, 20);
+    }
+}
+
 BOOST_AUTO_TEST_SUITE_END()