/// <summary>
/// Calculates the check digit. The given bank code will be
/// mapped to an registered method which calculates the check digit.
/// The account number is given without a check digit.
/// </summary>
/// <param name="accountNumber">The account number without a check digit.</param>
/// <returns>
/// The calculated check digit for the given account number
/// </returns>
public string CalculateCheckDigit(NationalAccountNumber accountNumber)
{
if (accountNumber == null)
{
throw new ArgumentNullException("accountNumber", "Please provide an account number.");
}
var germanAccountNumber = new GermanyAccountNumber(accountNumber);
var checkMethodCode = BankCodeMappingMethod.Resolve(germanAccountNumber.BankCode);
if (string.IsNullOrEmpty(checkMethodCode))
{
throw new ArgumentException(String.Format("Can't resolve the check method for the given bank code {0}.", germanAccountNumber.BankCode), "accountNumber");
}
return(accountNumberValidationByMethodCode.CalculateCheckDigit(germanAccountNumber.AccountNumber, checkMethodCode));
}
public void Should_Calculate_A_Digit_With_Method01()
{
IAccountNumberValidationByMethodCode sut = SuT;
Assert.AreEqual("7", sut.CalculateCheckDigit("423432278", "01"));
}