public void remove_itemTest()
{
Sale target = new Sale(0.8m);
target.addItem(1, 1);
target.addItem(2, 3);
target.addItem(3, 2);
Assert.AreEqual(3, target.ItemList.Count);
target.removeItem(1, 1);
Assert.AreEqual(2, target.ItemList.Count);
Assert.AreEqual(2, target.ItemList.ToArray()[0].getItem().ItemId);
Assert.AreEqual(3, target.ItemList.ToArray()[1].getItem().ItemId);
target.removeItem(2, 1);
Assert.AreEqual(2, target.ItemList.Count);
Assert.AreEqual(2, target.ItemList.ToArray()[0].getQty());
target.removeItem(2, 0);
Assert.AreEqual(2, target.ItemList.Count);
Assert.AreEqual(2, target.ItemList.ToArray()[0].getQty());
target.removeItem(2, 2);
Assert.AreEqual(1, target.ItemList.Count);
Assert.AreEqual(3, target.ItemList.ToArray()[0].getItem().ItemId);
}
