public async Task <LessonDto> Lesson_DeleteLesson_Return_LessonDTO() { CreateDefaultDeviceServiceInstance(); var lessonDto = await _timetableService.DeleteLesson(_fakeTimetable[0].Id, default(CancellationToken)); Assert.NotNull(lessonDto); Assert.True(Equals(lessonDto.Id, _fakeTimetable[0].Id)); return(lessonDto); }