public void SetGetExpirationDateTest() { // Arrange PaymentCard pc = new PaymentCard("Bank of Dragon", "Cool Dragon", "Debit", "0000000000001234", "111", "11/20", "05/33", "Super cool card I have here"); string newExpirationDate = "01/41"; // Act pc.UpdateExpirationDate(newExpirationDate); // Assert Assert.AreEqual(newExpirationDate, pc.GetExpirationDate()); }