public async void CitiesByProvinceId_Not_Exists() { var mock = new ServiceMockFacade <IProvinceService, IProvinceRepository>(); mock.RepositoryMock.Setup(x => x.CitiesByProvinceId(default(int), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <City> >(new List <City>())); var service = new ProvinceService(mock.LoggerMock.Object, mock.MediatorMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.ProvinceModelValidatorMock.Object, mock.DALMapperMockFactory.DALProvinceMapperMock, mock.DALMapperMockFactory.DALCityMapperMock, mock.DALMapperMockFactory.DALVenueMapperMock); List <ApiCityServerResponseModel> response = await service.CitiesByProvinceId(default(int)); response.Should().BeEmpty(); mock.RepositoryMock.Verify(x => x.CitiesByProvinceId(default(int), It.IsAny <int>(), It.IsAny <int>())); }