public void TestFindCitiesByTransportMode()
{
Cities cities = new Cities();
cities.ReadCities(@"citiesTestDataLab3.txt");
var routes = new Routes(cities);
routes.ReadRoutes(@"linksTestDataLab3.txt");
City[] citiesByMode = routes.FindCities(TransportMode.Rail);
Assert.AreEqual(11, citiesByMode.Length);
City[] emptyCitiesByMode = routes.FindCities(TransportMode.Bus);
Assert.AreEqual(0, emptyCitiesByMode.Length);
}