def test_decodeWithoutFinalASCIIShift(self):
        """
        An I{imap4-utf-7} encoded string that does not shift back to
        ASCII (i.e., it lacks a final C{-}) can be decoded.
        """
        self.assertEqual(
            b'&AL0'.decode('imap4-utf-7'),
            u"\N{VULGAR FRACTION ONE HALF}",
        )

        An I{imap4-utf-7} encoded string that does not shift back to
        ASCII (i.e., it lacks a final C{-}) can be decoded.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/test/test_imap.py