Method test_tzinfo_now

Lib/test/datetimetester.py:5315–5351

(self)

        self.assertEqual(delta, self.theclass.min - self.theclass.max)

    def test_tzinfo_now(self):
        meth = self.theclass.now
        # Ensure it doesn't require tzinfo (i.e., that this doesn't blow up).
        base = meth()
        # Try with and without naming the keyword.
        off42 = FixedOffset(42, "42")
        another = meth(off42)
        again = meth(tz=off42)
        self.assertIs(another.tzinfo, again.tzinfo)
        self.assertEqual(another.utcoffset(), timedelta(minutes=42))
        # Bad argument with and w/o naming the keyword.
        self.assertRaises(TypeError, meth, 16)
        self.assertRaises(TypeError, meth, tzinfo=16)
        # Bad keyword name.
        self.assertRaises(TypeError, meth, tinfo=off42)
        # Too many args.
        self.assertRaises(TypeError, meth, off42, off42)

        # We don't know which time zone we're in, and don't have a tzinfo
        # class to represent it, so seeing whether a tz argument actually
        # does a conversion is tricky.
        utc = FixedOffset(0, "utc", 0)
        for weirdtz in [FixedOffset(timedelta(hours=15, minutes=58), "weirdtz", 0),
                        timezone(timedelta(hours=15, minutes=58), "weirdtz"),]:
            for dummy in range(3):
                now = datetime.now(weirdtz)
                self.assertIs(now.tzinfo, weirdtz)
                with self.assertWarns(DeprecationWarning):
                    utcnow = datetime.utcnow().replace(tzinfo=utc)
                now2 = utcnow.astimezone(weirdtz)
                if abs(now - now2) < timedelta(seconds=30):
                    break
                # Else the code is broken, or more than 30 seconds passed between
                # calls; assuming the latter, just try again.
            else:
                # Three strikes and we're out.
                self.fail("utcnow(), now(tz), or astimezone() may be broken")

    def test_tzinfo_fromtimestamp(self):
        import time