code: def test_make_shift(self):
      trainer = testing.get_trainer_with_mock_updater(
          iter_per_epoch=10, extensions=[mod5_shift]
      )
      trainer.updater.get_optimizer.return_value = mock.MagicMock()
      trainer.updater.get_optimizer().x = -1
  
      mod5_shift.initialize(trainer)
      for i in range(100):
          self.assertEqual(trainer.updater.get_optimizer().x, i % 5)
          trainer.updater.update()
          mod5_shift(trainer)
  
file_path: chainercv/tests/chainer_experimental_tests/training_tests/extensions_tests/test_make_shift.py
imports: import mock
  import unittest
  from chainer import testing
  from chainercv.chainer_experimental.training.extensions import make_shift
label_desc: Use image node_id 1 for calling the TestMakeShift obj's underlying member method code with example usage: obj.test_make_shift() without return types