def test_fromRFC4034DateString(self):
        """
        L{SerialNumber.fromRFC4034DateString} accepts a datetime string argument
        of the form 'YYYYMMDDhhmmss' and returns an L{SerialNumber} instance
        whose value is the unix timestamp corresponding to that UTC date.
        """
        self.assertEqual(
            SerialNumber(1325376000),
            SerialNumber.fromRFC4034DateString('20120101000000')
        )

        L{SerialNumber.fromRFC4034DateString} accepts a datetime string argument
        of the form 'YYYYMMDDhhmmss' and returns an L{SerialNumber} instance
        whose value is the unix timestamp corresponding to that UTC date.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/names/test/test_rfc1982.py