def test_is_locked(get_lock_filepath):
    test_path = get_lock_filepath

    plock = lock.ProcessLock("./randompath/lockfile")
    assert plock.is_locked() is False

    plock.path = test_path
    with open(test_path, 'w') as f:
        f.write("")
    assert plock.is_locked() is False

    with open(test_path, 'w') as f:
        f.write("dfsdf")
    pytest.raises(ValueError, plock.is_locked)

    with open(test_path, 'w') as f:
        f.write("1234")
    assert plock.is_locked() is False

    with open(test_path, 'w') as f:
        f.write(str(os.getpid()))
    assert plock.is_locked() is True

    # any other cases that make sense ///

    os.remove(test_path)