public async void All() { var mock = new ServiceMockFacade <IStoreRepository>(); var records = new List <Store>(); records.Add(new Store()); mock.RepositoryMock.Setup(x => x.All(It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult(records)); var service = new StoreService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.StoreModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLStoreMapperMock, mock.DALMapperMockFactory.DALStoreMapperMock, mock.BOLMapperMockFactory.BOLCustomerMapperMock, mock.DALMapperMockFactory.DALCustomerMapperMock); List <ApiStoreResponseModel> response = await service.All(); response.Should().HaveCount(1); mock.RepositoryMock.Verify(x => x.All(It.IsAny <int>(), It.IsAny <int>())); }