code: def test_checked_session(setup):
      sess = new_test_session(default=True)
  
      a = mt.ones((10, 10))
      b = a + 1
      b.execute()
  
      np.testing.assert_array_equal(
          sess.fetch(b), np.ones((10, 10)) + 1
      )
  
      sess.stop_server()
  
file_path: mars/mars/deploy/oscar/tests/test_checked_session.py
imports: from typing import Any, Dict
  import numpy
  import pytest
  from ....None import tensor
  from ....config import option_context
  from ....core import TileableType, OperandType
  from ....services.task.supervisor.tests import CheckedTaskPreprocessor
  from ....services.subtask.worker.tests import CheckedSubtaskProcessor
  from ..local import _load_config
  from ..tests.session import new_test_session, CONFIG_FILE
label_desc: Use image node_id 2 for calling a global function with example usage: test_checked_session(setup) without return types