public void should_create_valid_national_number()
{
var nationalNumber = NationalNumber.Create();
var isValid = nationalNumber.IsValidNationalCode();
Check.That(isValid).IsTrue();
}
public void should_return_true_in_validate_valid_nationalCode()
{
var isValidNationalNumber = NationalNumber.IsValid(NationalNumber.Create());
Check.That(isValidNationalNumber).IsTrue();
}