Method test_local_datetime

test/test_bson.py:625–667

(self)

        self.assertEqual(as_utc, after)

    def test_local_datetime(self):
        # Timezone -60 minutes of UTC, with DST between April and July.
        tz = DSTAwareTimezone(60, "sixty-minutes", 4, 7)

        # It's not DST.
        local = datetime.datetime(year=2025, month=12, hour=2, day=1, tzinfo=tz)
        options = CodecOptions(tz_aware=True, tzinfo=tz)
        # Encode with this timezone, then decode to UTC.
        encoded = encode({"date": local}, codec_options=options)
        self.assertEqual(local.replace(hour=1, tzinfo=None), decode(encoded)["date"])

        # It's DST.
        local = datetime.datetime(year=2025, month=4, hour=1, day=1, tzinfo=tz)
        encoded = encode({"date": local}, codec_options=options)
        self.assertEqual(
            local.replace(month=3, day=31, hour=23, tzinfo=None), decode(encoded)["date"]
        )

        # Encode UTC, then decode in a different timezone.
        encoded = encode({"date": local.replace(tzinfo=utc)})
        decoded = decode(encoded, options)["date"]
        self.assertEqual(local.replace(hour=3), decoded)
        self.assertEqual(tz, decoded.tzinfo)

        # Test round-tripping.
        self.assertEqual(
            local, decode(encode({"date": local}, codec_options=options), options)["date"]
        )

        # Test around the Unix Epoch.
        epochs = (
            EPOCH_AWARE,
            EPOCH_AWARE.astimezone(FixedOffset(120, "one twenty")),
            EPOCH_AWARE.astimezone(FixedOffset(-120, "minus one twenty")),
        )
        utc_co = CodecOptions(tz_aware=True)
        for epoch in epochs:
            doc = {"epoch": epoch}
            # We always retrieve datetimes in UTC unless told to do otherwise.
            self.assertEqual(EPOCH_AWARE, decode(encode(doc), codec_options=utc_co)["epoch"])
            # Round-trip the epoch.
            local_co = CodecOptions(tz_aware=True, tzinfo=epoch.tzinfo)
            self.assertEqual(epoch, decode(encode(doc), codec_options=local_co)["epoch"])

    def test_naive_decode(self):
        aware = datetime.datetime(1993, 4, 4, 2, tzinfo=FixedOffset(555, "SomeZone"))