public async void Lessons_Not_Exists() { var mock = new ServiceMockFacade <ILessonStatusRepository>(); mock.RepositoryMock.Setup(x => x.Lessons(default(int), It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult <List <Lesson> >(new List <Lesson>())); var service = new LessonStatusService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.LessonStatusModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLLessonStatusMapperMock, mock.DALMapperMockFactory.DALLessonStatusMapperMock, mock.BOLMapperMockFactory.BOLLessonMapperMock, mock.DALMapperMockFactory.DALLessonMapperMock); List <ApiLessonResponseModel> response = await service.Lessons(default(int)); response.Should().BeEmpty(); mock.RepositoryMock.Verify(x => x.Lessons(default(int), It.IsAny <int>(), It.IsAny <int>())); }