code: def test_cli_name_required_for_uuid3(self, mock_err):
      with self.assertRaises(SystemExit) as cm:
          self.uuid.main()
      # Check that exception code is the same as argparse.ArgumentParser.error
      self.assertEqual(cm.exception.code, 2)
      self.assertIn(
          "error: Incorrect number of arguments", mock_err.getvalue()
      )
  
imports: import unittest
  from test import support
  from test.support import import_helper
  import builtins
  import contextlib
  import copy
  import enum
  import io
  import os
  import pickle
  import sys
  import weakref
  from unittest import mock
label_desc: Use image node_id 22 for calling the BaseTestUUID obj's underlying member method code with example usage: obj.test_cli_name_required_for_uuid3(mock_err) without return types