public async void Sales_Not_Exists() { var mock = new ServiceMockFacade <IPaymentTypeRepository>(); mock.RepositoryMock.Setup(x => x.Sales(default(int), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <Sale> >(new List <Sale>())); var service = new PaymentTypeService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.PaymentTypeModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLPaymentTypeMapperMock, mock.DALMapperMockFactory.DALPaymentTypeMapperMock, mock.BOLMapperMockFactory.BOLSaleMapperMock, mock.DALMapperMockFactory.DALSaleMapperMock); List <ApiSaleResponseModel> response = await service.Sales(default(int)); response.Should().BeEmpty(); mock.RepositoryMock.Verify(x => x.Sales(default(int), It.IsAny <int>(), It.IsAny <int>())); }