public void Then_the_id_is_correct(string input, string errorMessage)
{
var error = Assert.Throws <ArgumentException>(() => BoardingPassReader.GetBoardingPassId(input));
Assert.That(error.Message, Is.EqualTo(errorMessage));
}
public void Then_the_id_is_correct()
{
Assert.That(BoardingPassReader.GetBoardingPassId("FBFBBFFRLR"), Is.EqualTo(357));
}