public void ClearMealListTest()
{
CustomerFormPresentationModel model = new CustomerFormPresentationModel(new Model());
model.AddMeal(model.FindMealByName("薯條（小包）"));
model.AddMeal(model.FindMealByName("薯條（中包）"));
Assert.AreEqual(model.GetMealList().Count, 2);
model.ClearMealList();
Assert.AreEqual(model.GetMealList().Count, 0);
}