How to use the pipx.constants.LOCAL_BIN_DIR.mkdir function in pipx

def test_existing_symlink_points_to_existing_wrong_location_warning(
    pipx_temp_env, caplog, capsys
):
    if sys.platform.startswith("win"):
        pytest.skip("pipx does not use symlinks on Windows")

    constants.LOCAL_BIN_DIR.mkdir(exist_ok=True, parents=True)
    (constants.LOCAL_BIN_DIR / "pycowsay").symlink_to(os.devnull)
    assert not run_pipx_cli(["install", "pycowsay"])
    captured = capsys.readouterr()
    assert "File exists at" in caplog.text
    assert "symlink missing or pointing to unexpected location" in captured.out
    # bin dir was on path, so the warning should NOT appear (even though the symlink
    # pointed to the wrong location)
    assert "is not on your PATH environment variable" not in captured.err

def test_existing_symlink_points_to_nothing(pipx_temp_env, caplog, capsys):
    constants.LOCAL_BIN_DIR.mkdir(exist_ok=True, parents=True)
    (constants.LOCAL_BIN_DIR / "pycowsay").symlink_to("/asdf/jkl")
    assert not run_pipx_cli(["install", "pycowsay"])
    captured = capsys.readouterr()
    # pipx should realize the symlink points to nothing and replace it,
    # so no warning should be present
    assert "symlink missing or pointing to unexpected location" not in captured.out