public void ISBN_InvalidTest()
{
foreach (var item in _invalid)
{
Assert.IsFalse(ISBNValidator.IsValid(item), $"Value '{item}' has passed validation");
}
}
public void ISBN_ValidTest()
{
foreach (var item in _valid)
{
Assert.IsTrue(ISBNValidator.IsValid(item), $"Value '{item}' has not passed validation");
}
}