/// <summary> /// Calculates the check digit. /// </summary> /// <param name="creditCardNumber">The credit card number.</param> /// <returns></returns> public static string CalculateCheckDigit(this string creditCardNumber) { return(creditCardNumberCheck.CalculateCheckDigit(creditCardNumber, CreditCardNetwork.Automatic)); }
public void Should_Calculate_A_Digit_With_Visa() { ICreditCardNumberCheck sut = SuT; Assert.AreEqual("6", sut.CalculateCheckDigit("4992739871", CreditCardNetwork.Visa)); }