code: def test_fs_path():
      from pathlib import Path
  
      class PseudoStrPath:
          def __fspath__(self):
              return "foo/bar"
  
      class PseudoBytesPath:
          def __fspath__(self):
              return b"foo/bar"
  
      assert m.parent_path(Path("foo/bar")) == Path("foo")
      assert m.parent_path("foo/bar") == Path("foo")
      assert m.parent_path(b"foo/bar") == Path("foo")
      assert m.parent_path(PseudoStrPath()) == Path("foo")
      assert m.parent_path(PseudoBytesPath()) == Path("foo")
  
imports: import pytest
  from pybind11_tests import ConstructorStats, UserType
  from pybind11_tests import stl
label_desc: Use image node_id 13 for calling a global function with example usage: test_fs_path() and returns: str, bytes