public void NullValueThrowsArgumentNullException() { CardNumberValidator.IsValid(null); }
public void EmptyValueIsInvalid() { Assert.IsFalse(CardNumberValidator.IsValid(""), "Null value must not be valid"); }
private static void AssertIsInvalid(string cardNumber) { string errorMessage = string.Format("Card number '{0}' must be invalid!", cardNumber); Assert.IsFalse(CardNumberValidator.IsValid(cardNumber.Replace(" ", "")), errorMessage); }