PaymentCard.GetExpirationDate C# (CSharp) Method

    public Date GetExpirationDate()
    {
    }

        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());
        }