code: def test_make_extension_default_values(self):
      @training.make_extension()
      def my_extension(trainer):
          pass
  
      self.assertEqual(my_extension.trigger, (1, "iteration"))
      self.assertEqual(my_extension.default_name, "my_extension")
      self.assertEqual(my_extension.priority, training.PRIORITY_READER)
      self.assertIsNone(my_extension.initialize)
  
file_path: chainer/tests/chainer_tests/training_tests/test_extension.py
imports: import unittest
  import pytest
  from chainer import testing
  from chainer import training
label_desc: Use image node_id 5 for calling the TestExtension obj's underlying member method code with example usage: obj.test_make_extension_default_values() without return types