public async void ByName_Not_Exists() { var mock = new ServiceMockFacade <ISubscriptionRepository>(); mock.RepositoryMock.Setup(x => x.ByName(It.IsAny <string>())).Returns(Task.FromResult <Subscription>(null)); var service = new SubscriptionService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.SubscriptionModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLSubscriptionMapperMock, mock.DALMapperMockFactory.DALSubscriptionMapperMock); ApiSubscriptionResponseModel response = await service.ByName(default(string)); response.Should().BeNull(); mock.RepositoryMock.Verify(x => x.ByName(It.IsAny <string>())); }