def test_filePathDeltaSiblingDir(self):
        """
        L{filePathDelta} can traverse upwards to create relative paths to
        siblings.
        """
        self.assertEqual(filePathDelta(FilePath("/foo/bar"),
                                       FilePath("/foo/baz")),
                         ["..", "baz"])

        L{filePathDelta} can traverse upwards to create relative paths to
        siblings.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/python/test/test_release.py