code: def check_join(self, expected, *inputs):
      from importlib._bootstrap_external import _path_join
  
      actual = _path_join(*inputs)
      if expected.casefold() == actual.casefold():
          return
      self.assertEqual(expected, actual)
  
imports: from test.test_importlib import util
  import os
  import re
  import sys
  import unittest
  from test import support
  from test.support import import_helper
  from contextlib import contextmanager
  from test.test_importlib.util import temp_module
  from winreg import CreateKey, HKEY_CURRENT_USER, SetValue, REG_SZ, KEY_ALL_ACCESS, EnumKey, CloseKey, DeleteKey, OpenKey
label_desc: Use image node_id 1 for calling the WindowsBootstrapPathTests obj's underlying member method code with example usage: obj.check_join(expected) without return types