public void TestEmptyMethodOfPayment() { cardType card = new cardType(); card.type = methodOfPaymentTypeEnum.Item; card.number = "4100000000000001"; card.expDate = "1250"; String actual = card.Serialize(); String expected = @" <type></type> <number>4100000000000001</number> <expDate>1250</expDate>"; Assert.AreEqual(expected, actual); }