test_tzinfo.py 文件源码

def test_fromutc(self):
        # naive datetime.
        dt1 = datetime(2011, 10, 31)

        # localized datetime, same timezone.
        dt2 = self.tz.localize(dt1)

        # Both should give the same results. Note that the standard
        # Python tzinfo.fromutc() only supports the second.
        for dt in [dt1, dt2]:
            loc_dt = self.tz.fromutc(dt)
            loc_dt2 = pytz.utc.localize(dt1).astimezone(self.tz)
            self.assertEqual(loc_dt, loc_dt2)

        # localized datetime, different timezone.
        new_tz = pytz.timezone('Europe/Paris')
        self.assertTrue(self.tz is not new_tz)
        dt3 = new_tz.localize(dt1)
        self.assertRaises(ValueError, self.tz.fromutc, dt3)