public void TestMethodAdd()
{
// arrange
Prices ven = new Prices(_itemcollect, _discount);
// act
Item myItem = new Item(3, "BK", 10, 4, "Book");
IList <Item> actualnewlist = new List <Item>();
actualnewlist.Add(myItem);
IList <Item> expectednewlist = ven.AddItem(3, "BK", 10, 4, "Book");
//assert
Assert.AreEqual(expectednewlist, actualnewlist);
}
