code: def test_can_capture_previously_warned(self) -> None:
      def f() -> int:
          warnings.warn(UserWarning("ohai"))
          return 10
  
      assert f() == 10
      assert pytest.warns(UserWarning, f) == 10
      assert pytest.warns(UserWarning, f) == 10
      assert pytest.warns(UserWarning, f) != "10"
  
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 14 for calling the TestWarns obj's underlying member method code with example usage: obj.test_can_capture_previously_warned() and returns: int