public async void All() { var mock = new ServiceMockFacade <IProductCategoryRepository>(); var records = new List <ProductCategory>(); records.Add(new ProductCategory()); mock.RepositoryMock.Setup(x => x.All(It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult(records)); var service = new ProductCategoryService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.ProductCategoryModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLProductCategoryMapperMock, mock.DALMapperMockFactory.DALProductCategoryMapperMock, mock.BOLMapperMockFactory.BOLProductSubcategoryMapperMock, mock.DALMapperMockFactory.DALProductSubcategoryMapperMock); List <ApiProductCategoryResponseModel> response = await service.All(); response.Should().HaveCount(1); mock.RepositoryMock.Verify(x => x.All(It.IsAny <int>(), It.IsAny <int>())); }