public void GetOrderIdListTest() { string[] idList = { "item0", "item1" }; _itemOrder.AddToOrder(idList[0]); _itemOrder.AddToOrder(idList[1]); Assert.AreEqual(2, _itemOrder.GetOrderIdList().Count); foreach (string id in idList) { Assert.IsTrue(_itemOrder.GetOrderIdList().Contains(id)); } }