public async void CurrencyRatesByFromCurrencyCode_Not_Exists() { var mock = new ServiceMockFacade <ICurrencyRepository>(); mock.RepositoryMock.Setup(x => x.CurrencyRatesByFromCurrencyCode(default(string), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <CurrencyRate> >(new List <CurrencyRate>())); var service = new CurrencyService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.CurrencyModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLCurrencyMapperMock, mock.DALMapperMockFactory.DALCurrencyMapperMock, mock.BOLMapperMockFactory.BOLCurrencyRateMapperMock, mock.DALMapperMockFactory.DALCurrencyRateMapperMock); List <ApiCurrencyRateResponseModel> response = await service.CurrencyRatesByFromCurrencyCode(default(string)); response.Should().BeEmpty(); mock.RepositoryMock.Verify(x => x.CurrencyRatesByFromCurrencyCode(default(string), It.IsAny <int>(), It.IsAny <int>())); }