public async void All() { var mock = new ServiceMockFacade <ICurrencyRepository>(); var records = new List <Currency>(); records.Add(new Currency()); mock.RepositoryMock.Setup(x => x.All(It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult(records)); 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 <ApiCurrencyResponseModel> response = await service.All(); response.Should().HaveCount(1); mock.RepositoryMock.Verify(x => x.All(It.IsAny <int>(), It.IsAny <int>())); }