public void DeleteDrinkTest()
{
_pageList.DeleteDrink(0);
Assert.AreEqual(_pageList.GetList(0).GetDrinkCount(), 0);
_pageList.AddItem(new Drink("da", 123), 0);
Assert.AreEqual(_pageList.GetList(0).GetDrinkCount(), 1);
_pageList.DeleteDrink(0);
Assert.AreEqual(_pageList.GetList(0).GetDrinkCount(), 0);
}