public void GetSubmissionById_ShouldCallSubmissionRepository_GetById(int id) { //Arrange var mockSubmissionRepository = new Mock <IRepository <Submission> >(); var mockQuestionService = new Mock <IQuestionUtility>(); var mockDateTimeProvider = new Mock <IDateTimeProvider>(); var mockAuthenticationProvider = new Mock <IAuthenticationProvider>(); var mockUnitOfWork = new Mock <IUnitOfWork>(); var controller = new ModerationService(mockSubmissionRepository.Object, mockQuestionService.Object, mockDateTimeProvider.Object, mockAuthenticationProvider.Object, mockUnitOfWork.Object ); //Act controller.GetSubmissionById(id); //Assert mockSubmissionRepository.Verify(x => x.GetById(id), Times.Once); }