public void GetCityMocqTest() { var mock = new Mock <IDataSourceCIty>(); mock.Setup(x => x.City(It.IsAny <double>(), It.IsAny <double>())).Returns(() => new City() { }); IRepositoryCity city = new CityRepository(mock.Object); Assert.IsNotNull(city.City(4545.555, 4554.4455)); mock.Verify(x => x.City(4545.555, 4554.4455)); }