code: def test_int_subclass_with_index(self):
      class MyIndex(int):
          def __index__(self):
              return 42
  
      class BadIndex(int):
          def __index__(self):
              return 42.0
  
      my_int = MyIndex(7)
      self.assertEqual(my_int, 7)
      self.assertEqual(int(my_int), 7)
  
      self.assertEqual(int(BadIndex()), 0)
  
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 15 for calling the IntTestCases obj's underlying member method code with example usage: obj.test_int_subclass_with_index() and returns: int, int