public void CountMealOfCategoryTest()
        {
            string name  = "飲料";
            int    count = _mealControl.CountMealOfCategory(name);

            Assert.AreEqual(3, count);
        }
 // check is empty Category --
 public void IsEmptyMealOfCategory(string name)
 {
     if (_mealControl.CountMealOfCategory(name) > 0)
     {
         _isDeleteCategoryEnabled = false;
     }
     else
     {
         _isDeleteCategoryEnabled = true;
     }
 }