public void ISBNMapper_ConvertsISBN13ToISBN10Correctly(string isbn, string expectedResult)
{
ISBN10 newIsbn = null;
Assert.DoesNotThrow(() => newIsbn = ISBNMapper.From(new ISBN13(isbn)));
Assert.AreEqual(newIsbn.Value, expectedResult);
}
public static ISBN Create(string isbn)
{
var clearIsbn = isbn?.Replace("-", "") ?? "";
return(clearIsbn?.Length switch
{
10 => ISBNMapper.From(new ISBN10(isbn)),
13 => new ISBN13(isbn),
_ => throw new FormatException($"The passed ISBN has incorrect format. Expected 10 or 13 digits, but got only {clearIsbn.Length}"),
});
public void ISBNMapper_ThrowsFormatExceptionIfISBN13StartsWith979(string isbn)
{
ISBN13 newIsbn = new ISBN13(isbn);
Assert.Throws <FormatException>(() => ISBNMapper.From(newIsbn));
}