code: def test_obj_class_name():
      assert m.obj_class_name(None) == "NoneType"
      assert m.obj_class_name(list) == "list"
      assert m.obj_class_name([]) == "list"
  
imports: import contextlib
  import sys
  import types
  import pytest
  import env
  from pybind11_tests import detailed_error_messages_enabled
  from pybind11_tests import pytypes
label_desc: Use image node_id 1 for calling a global function with example usage: test_obj_class_name() without return types