code: def test_function(self) -> None:
      pytest.warns(
          SyntaxWarning,
          lambda msg: warnings.warn(msg, SyntaxWarning),
          "syntax",
      )
  
imports: import warnings
  from typing import List
  from typing import Optional
  from typing import Type
  import pytest
  from _pytest.pytester import Pytester
  from _pytest.recwarn import WarningsRecorder
label_desc: Use image node_id 3 for calling the TestWarns obj's underlying member method code with example usage: obj.test_function() without return types