public void EditStockInDatabase() { Discount discount = new Discount("D107", DiscountTypeEnum.Hidden, DateTime.Parse("01/01/2018"), DateTime.Parse("31/12/2018"), 50, true); Product product = new Product("P111", "BOX", 100, "this is a plastic box"); StockListItem expected = new StockListItem(10, product, discount, PurchaseEnum.Immediate, "S1"); handler.AddStockListItemToDataBase(expected); StockListItem find = handler.GetStockListItembyProductID("P111"); Assert.AreEqual(expected, find); expected.Quantity = 3; Assert.AreNotEqual(expected, find); handler.EditStockInDatabase(expected); find = handler.GetStockListItembyProductID("P111"); Assert.AreEqual(expected, find); }