public void GetOrderedDrinkTest() { Assert.AreEqual(_orderList.GetOrderedDrink(-1), null); Assert.AreEqual(_orderList.GetOrderedDrink(0), null); Assert.AreEqual(_orderList.GetOrderedDrink(1), null); _orderList.OrderDrink(new Drink("D", 55)); Assert.AreEqual(_orderList.GetOrderedDrink(-1), null); Assert.AreNotEqual(_orderList.GetOrderedDrink(0), null); Assert.AreEqual(_orderList.GetOrderedDrink(1), null); }