'We request the limit (something that doesn\'t exist)
- If http://localhost/a.php?b=1
then I should request b=12938795 (random number)
- If http://localhost/a.php?b=abc
then I should request b=hnv98yks (random alnum)
:return: The limit response object'

def _get_limit_response(self, mutant):

    mutant_copy = mutant.copy()
    is_digit = mutant.get_token_original_value().isdigit()
    value = (rand_number(length=8) if is_digit else rand_alnum(length=8))
    mutant_copy.set_token_value(value)
    limit_response = self._uri_opener.send_mutant(mutant_copy)
    return limit_response
