code: def test_context_manager(self):
      # ensure that the handle is closed if an exception occurs
      try:
          with ConnectRegistry(None, HKEY_LOCAL_MACHINE) as h:
              self.assertNotEqual(h.handle, 0)
              raise OSError
      except OSError:
          self.assertEqual(h.handle, 0)
  
imports: import gc
  import os, sys, errno
  import threading
  import unittest
  from platform import machine, win32_edition
  from test.support import cpython_only, import_helper
  from winreg import *
label_desc: Use image node_id 7 for calling the LocalWinregTests obj's underlying member method code with example usage: obj.test_context_manager() without return types