public void TestDeleteCity()
{
List <City> cities = new List <City>();
City city = new City {
Name = "New York", DistrictId = 12
};
DynamicMock dynamicMock = new DynamicMock(typeof(LocationsManager));
dynamicMock.ExpectAndReturn("AddCity", 3, city);
dynamicMock.SetReturnValue("GetCities", cities);
dynamicMock.Expect("DeleteCityById", 2);
LocationsManager mocklocationManager = (LocationsManager)dynamicMock.MockInstance;
LocationServices locationService = new LocationServices(mocklocationManager);
locationService.DeleteCity(2);
Assert.AreEqual(3, locationService.AddCity(city));
Assert.AreEqual(0, locationService.GetCities().Count);
}