public async void All() { var mock = new ServiceMockFacade <ILessonRepository>(); var records = new List <Lesson>(); records.Add(new Lesson()); mock.RepositoryMock.Setup(x => x.All(It.IsAny <int>(), It.IsAny <int>())).Returns(Task.FromResult(records)); var service = new LessonService(mock.LoggerMock.Object, mock.RepositoryMock.Object, mock.ModelValidatorMockFactory.LessonModelValidatorMock.Object, mock.BOLMapperMockFactory.BOLLessonMapperMock, mock.DALMapperMockFactory.DALLessonMapperMock, mock.BOLMapperMockFactory.BOLLessonXStudentMapperMock, mock.DALMapperMockFactory.DALLessonXStudentMapperMock, mock.BOLMapperMockFactory.BOLLessonXTeacherMapperMock, mock.DALMapperMockFactory.DALLessonXTeacherMapperMock); List <ApiLessonResponseModel> response = await service.All(); response.Should().HaveCount(1); mock.RepositoryMock.Verify(x => x.All(It.IsAny <int>(), It.IsAny <int>())); }