public void SetSugarLevelTest()
{
Sugar sugarTest = new Sugar();
sugarTest.SetSugarLevel("半糖");
Assert.AreEqual(sugarTest.level, "半糖");
sugarTest.SetSugarLevel("hggg");
Assert.AreEqual(sugarTest.level, "");
}
public void IsNoneTest()
{
Sugar sugarTest = new Sugar();
Assert.AreEqual(sugarTest.IsNone(), true);
sugarTest.SetSugarLevel("無糖");
Assert.AreEqual(sugarTest.IsNone(), false);
}