public async void Get_null_record() { var mock = new ServiceMockFacade<IStudioRepository>(); mock.RepositoryMock.Setup(x => x.Get(It.IsAny<int>())).Returns(Task.FromResult<Studio>(null)); var service = new StudioService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.StudioModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLStudioMapperMock, mock.DALMapperMockFactory.DALStudioMapperMock); ApiStudioResponseModel response = await service.Get(default(int)); response.Should().BeNull(); mock.RepositoryMock.Verify(x => x.Get(It.IsAny<int>())); }