public void CreateResponseForFilesByCriteriaWithOutElements() { // arrange const int NumberOfFiles = 0; var repositoryMock = new Mock<IRepository<File>>(); var files = new List<File> { new File()}; repositoryMock.SetupIQueryable( files.AsQueryable()); var specficication = new Specification<File>(x => true); var file = new File(); var sut = new FileServiceBase { Repository = repositoryMock.Object }; // act var result = sut.CreateResponseForSingleFileByCriteria(file, specficication) as HttpResult; // assert //TODO REVIEW Assert.NotNull(result); Assert.Equal(result.StatusCode, HttpStatusCode.NotFound); }