code: def test_sign_not_counted(self):
      int_class = self.int_class
      max_digits = sys.get_int_max_str_digits()
      s = "5" * max_digits
      i = int_class(s)
      pos_i = int_class(f"+{s}")
      assert i == pos_i
      neg_i = int_class(f"-{s}")
      assert -pos_i == neg_i
      str(pos_i)
      str(neg_i)
  
imports: import sys
  import time
  import unittest
  from unittest import mock
  from test import support
  from test.test_grammar import VALID_UNDERSCORE_LITERALS, INVALID_UNDERSCORE_LITERALS
label_desc: Use image node_id 11 for calling the IntStrDigitLimitsTests obj's underlying member method code with example usage: obj.test_sign_not_counted() without return types