test_strptime.py 文件源码

def test_TimeRE_recreation_timezone(self):
        # The TimeRE instance should be recreated upon changing the timezone.
        oldtzname = time.tzname
        tm = _strptime._strptime_time(time.tzname[0], '%Z')
        self.assertEqual(tm.tm_isdst, 0)
        tm = _strptime._strptime_time(time.tzname[1], '%Z')
        self.assertEqual(tm.tm_isdst, 1)
        # Get id of current cache object.
        first_time_re = _strptime._TimeRE_cache
        # Change the timezone and force a recreation of the cache.
        os.environ['TZ'] = 'EST+05EDT,M3.2.0,M11.1.0'
        time.tzset()
        tm = _strptime._strptime_time(time.tzname[0], '%Z')
        self.assertEqual(tm.tm_isdst, 0)
        tm = _strptime._strptime_time(time.tzname[1], '%Z')
        self.assertEqual(tm.tm_isdst, 1)
        # Get the new cache object's id.
        second_time_re = _strptime._TimeRE_cache
        # They should not be equal.
        self.assertIsNot(first_time_re, second_time_re)
        # Make sure old names no longer accepted.
        with self.assertRaises(ValueError):
            _strptime._strptime_time(oldtzname[0], '%Z')
        with self.assertRaises(ValueError):
            _strptime._strptime_time(oldtzname[1], '%Z')