code: def test_pdb_prevent_ConftestImportFailure_hiding_exception(
      self, pytester: Pytester
  ) -> None:
      pytester.makepyfile("def test_func(): pass")
      sub_dir = pytester.path.joinpath("ns")
      sub_dir.mkdir()
      sub_dir.joinpath("conftest").with_suffix(".py").write_text(
          "import unknown", "utf-8"
      )
      sub_dir.joinpath("test_file").with_suffix(".py").write_text(
          "def test_func(): pass", "utf-8"
      )
  
      result = pytester.runpytest_subprocess("--pdb", ".")
      result.stdout.fnmatch_lines(["-> import unknown"])
  
imports: import os
  import sys
  from typing import List
  import _pytest._code
  import pytest
  from _pytest.debugging import _validate_usepdb_cls
  from _pytest.monkeypatch import MonkeyPatch
  from _pytest.pytester import Pytester
label_desc: Use image node_id 18 for calling the TestPDB obj's underlying member method code with example usage: obj.test_pdb_prevent_ConftestImportFailure_hiding_exception(pytester) without return types