public void UpdateLessonGrade_Test()
        {
            var lesson = new Lesson
            {
                LessonId = 12,
                Grade    = 95.4,
                IsPassed = true
            };

            var module = new Module
            {
                ModuleId            = 1,
                MinimumPassingGrade = 93,
                Lessons             = new List <Lesson>
                {
                    new Lesson
                    {
                        LessonId = 12,
                        Grade    = 9.4,
                        IsPassed = false
                    }
                }
            };
            var mockLessonRepo = new DynamicMock(typeof(ILessonRepository));
            var mockModuleRepo = new DynamicMock(typeof(IModuleRepository));

            mockLessonRepo.ExpectAndReturn("GetLesson", lesson);
            mockModuleRepo.GetModule("GetModule", module);

            var testLessonService = new LessonService();
            var retLesson         = testLessonService.UpdateLessonGrade(12, 100);

            Assert.AreEqual(100, retLesson.Grade);
            Assert.AreEqual(true, retLesson.IsPassed);
        }