public void Calculating_For_A_Null_String_Throws_ArgumentNullException()
{
var sut = new ModChecksumCalculator(97);
Action action = () => sut.Calculate(null);
action.Should().Throw <ArgumentNullException>();
}
public void Calculate_Returns_Correct_Result()
{
var sut = new ModChecksumCalculator(97);
sut.Calculate("0").Should().Be(0);
sut.Calculate("97").Should().Be(0);
sut.Calculate("3").Should().Be(3);
sut.Calculate("975").Should().Be(5);
}
/// <summary>
/// check the iban to make sure that the check digits are correct for the basic bank account number
/// </summary>
/// <param name="iban">the iban to check</param>
internal static bool Validate(ParsingResult iban)
{
if (string.IsNullOrEmpty(iban.BasicAccountNumber))
{
return(true);
}
var rearranged = iban.BasicAccountNumber + iban.CountryCode + iban.CheckDigits;
var converted = string.Join("", rearranged.Select(ToInteger));
var algorithm = new ModChecksumCalculator(97);
return(algorithm.Validate(converted, 1));
}
