2 30 happens twice once before dst ends and once after 2 30 never happened due to dst the gettimezonename helper must return the offset for fixed offset timezones for usage with trunc db functions the datetime timezone examples show the current behavior datetime timezone fixed offset with and without name zoneinfo named and fixed offset africa nairobi asia bangkok 2 30 happens twice once before dst ends and once after 2 30 never happened due to dst the _get_timezone_name helper must return the offset for fixed offset timezones for usage with trunc db functions the datetime timezone examples show the current behavior datetime timezone fixed offset with and without name zoneinfo named and fixed offset
import datetime
import zoneinfo
from unittest import mock

from django.test import SimpleTestCase, override_settings
from django.utils import timezone

PARIS_ZI = zoneinfo.ZoneInfo("Europe/Paris")
EAT = timezone.get_fixed_timezone(180)  
ICT = timezone.get_fixed_timezone(420)  
UTC = datetime.timezone.utc


class TimezoneTests(SimpleTestCase):
    def test_default_timezone_is_zoneinfo(self):
        self.assertIsInstance(timezone.get_default_timezone(), zoneinfo.ZoneInfo)

    def test_now(self):
        with override_settings(USE_TZ=True):
            self.assertTrue(timezone.is_aware(timezone.now()))
        with override_settings(USE_TZ=False):
            self.assertTrue(timezone.is_naive(timezone.now()))

    def test_localdate(self):
        naive = datetime.datetime(2015, 1, 1, 0, 0, 1)
        with self.assertRaisesMessage(
            ValueError, "localtime() cannot be applied to a naive datetime"
        ):
            timezone.localdate(naive)
        with self.assertRaisesMessage(
            ValueError, "localtime() cannot be applied to a naive datetime"
        ):
            timezone.localdate(naive, timezone=EAT)

        aware = datetime.datetime(2015, 1, 1, 0, 0, 1, tzinfo=ICT)
        self.assertEqual(
            timezone.localdate(aware, timezone=EAT), datetime.date(2014, 12, 31)
        )
        with timezone.override(EAT):
            self.assertEqual(timezone.localdate(aware), datetime.date(2014, 12, 31))

        with mock.patch("django.utils.timezone.now", return_value=aware):
            self.assertEqual(
                timezone.localdate(timezone=EAT), datetime.date(2014, 12, 31)
            )
            with timezone.override(EAT):
                self.assertEqual(timezone.localdate(), datetime.date(2014, 12, 31))

    def test_override(self):
        default = timezone.get_default_timezone()
        try:
            timezone.activate(ICT)

            with timezone.override(EAT):
                self.assertIs(EAT, timezone.get_current_timezone())
            self.assertIs(ICT, timezone.get_current_timezone())

            with timezone.override(None):
                self.assertIs(default, timezone.get_current_timezone())
            self.assertIs(ICT, timezone.get_current_timezone())

            timezone.deactivate()

            with timezone.override(EAT):
                self.assertIs(EAT, timezone.get_current_timezone())
            self.assertIs(default, timezone.get_current_timezone())

            with timezone.override(None):
                self.assertIs(default, timezone.get_current_timezone())
            self.assertIs(default, timezone.get_current_timezone())
        finally:
            timezone.deactivate()

    def test_override_decorator(self):
        default = timezone.get_default_timezone()

        @timezone.override(EAT)
        def func_tz_eat():
            self.assertIs(EAT, timezone.get_current_timezone())

        @timezone.override(None)
        def func_tz_none():
            self.assertIs(default, timezone.get_current_timezone())

        try:
            timezone.activate(ICT)

            func_tz_eat()
            self.assertIs(ICT, timezone.get_current_timezone())

            func_tz_none()
            self.assertIs(ICT, timezone.get_current_timezone())

            timezone.deactivate()

            func_tz_eat()
            self.assertIs(default, timezone.get_current_timezone())

            func_tz_none()
            self.assertIs(default, timezone.get_current_timezone())
        finally:
            timezone.deactivate()

    def test_override_string_tz(self):
        with timezone.override("Asia/Bangkok"):
            self.assertEqual(timezone.get_current_timezone_name(), "Asia/Bangkok")

    def test_override_fixed_offset(self):
        with timezone.override(datetime.timezone(datetime.timedelta(), "tzname")):
            self.assertEqual(timezone.get_current_timezone_name(), "tzname")

    def test_activate_invalid_timezone(self):
        with self.assertRaisesMessage(ValueError, "Invalid timezone: None"):
            timezone.activate(None)

    def test_is_aware(self):
        self.assertTrue(
            timezone.is_aware(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT))
        )
        self.assertFalse(timezone.is_aware(datetime.datetime(2011, 9, 1, 13, 20, 30)))

    def test_is_naive(self):
        self.assertFalse(
            timezone.is_naive(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT))
        )
        self.assertTrue(timezone.is_naive(datetime.datetime(2011, 9, 1, 13, 20, 30)))

    def test_make_aware(self):
        self.assertEqual(
            timezone.make_aware(datetime.datetime(2011, 9, 1, 13, 20, 30), EAT),
            datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT),
        )
        with self.assertRaises(ValueError):
            timezone.make_aware(
                datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT), EAT
            )

    def test_make_naive(self):
        self.assertEqual(
            timezone.make_naive(
                datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT), EAT
            ),
            datetime.datetime(2011, 9, 1, 13, 20, 30),
        )
        self.assertEqual(
            timezone.make_naive(
                datetime.datetime(2011, 9, 1, 17, 20, 30, tzinfo=ICT), EAT
            ),
            datetime.datetime(2011, 9, 1, 13, 20, 30),
        )

        with self.assertRaisesMessage(
            ValueError, "make_naive() cannot be applied to a naive datetime"
        ):
            timezone.make_naive(datetime.datetime(2011, 9, 1, 13, 20, 30), EAT)

    def test_make_naive_no_tz(self):
        self.assertEqual(
            timezone.make_naive(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT)),
            datetime.datetime(2011, 9, 1, 5, 20, 30),
        )

    def test_make_aware_no_tz(self):
        self.assertEqual(
            timezone.make_aware(datetime.datetime(2011, 9, 1, 13, 20, 30)),
            datetime.datetime(
                2011, 9, 1, 13, 20, 30, tzinfo=timezone.get_fixed_timezone(-300)
            ),
        )

    def test_make_aware2(self):
        CEST = datetime.timezone(datetime.timedelta(hours=2), "CEST")
        self.assertEqual(
            timezone.make_aware(datetime.datetime(2011, 9, 1, 12, 20, 30), PARIS_ZI),
            datetime.datetime(2011, 9, 1, 12, 20, 30, tzinfo=CEST),
        )
        with self.assertRaises(ValueError):
            timezone.make_aware(
                datetime.datetime(2011, 9, 1, 12, 20, 30, tzinfo=PARIS_ZI), PARIS_ZI
            )

    def test_make_naive_zoneinfo(self):
        self.assertEqual(
            timezone.make_naive(
                datetime.datetime(2011, 9, 1, 12, 20, 30, tzinfo=PARIS_ZI), PARIS_ZI
            ),
            datetime.datetime(2011, 9, 1, 12, 20, 30),
        )

        self.assertEqual(
            timezone.make_naive(
                datetime.datetime(2011, 9, 1, 12, 20, 30, fold=1, tzinfo=PARIS_ZI),
                PARIS_ZI,
            ),
            datetime.datetime(2011, 9, 1, 12, 20, 30, fold=1),
        )

    def test_make_aware_zoneinfo_ambiguous(self):
        
        ambiguous = datetime.datetime(2015, 10, 25, 2, 30)

        std = timezone.make_aware(ambiguous.replace(fold=1), timezone=PARIS_ZI)
        dst = timezone.make_aware(ambiguous, timezone=PARIS_ZI)

        self.assertEqual(
            std.astimezone(UTC) - dst.astimezone(UTC), datetime.timedelta(hours=1)
        )
        self.assertEqual(std.utcoffset(), datetime.timedelta(hours=1))
        self.assertEqual(dst.utcoffset(), datetime.timedelta(hours=2))

    def test_make_aware_zoneinfo_non_existent(self):
        
        non_existent = datetime.datetime(2015, 3, 29, 2, 30)

        std = timezone.make_aware(non_existent, PARIS_ZI)
        dst = timezone.make_aware(non_existent.replace(fold=1), PARIS_ZI)

        self.assertEqual(
            std.astimezone(UTC) - dst.astimezone(UTC), datetime.timedelta(hours=1)
        )
        self.assertEqual(std.utcoffset(), datetime.timedelta(hours=1))
        self.assertEqual(dst.utcoffset(), datetime.timedelta(hours=2))

    def test_get_timezone_name(self):
        
        tests = [
            
            (datetime.timezone(datetime.timedelta(hours=10)), "UTC+10:00"),
            (
                datetime.timezone(datetime.timedelta(hours=10), name="Etc/GMT-10"),
                "Etc/GMT-10",
            ),
            
            (zoneinfo.ZoneInfo("Europe/Madrid"), "Europe/Madrid"),
            (zoneinfo.ZoneInfo("Etc/GMT-10"), "+10"),
        ]
        for tz, expected in tests:
            with self.subTest(tz=tz, expected=expected):
                self.assertEqual(timezone._get_timezone_name(tz), expected)

    def test_get_default_timezone(self):
        self.assertEqual(timezone.get_default_timezone_name(), "America/Chicago")

    def test_fixedoffset_timedelta(self):
        delta = datetime.timedelta(hours=1)
        self.assertEqual(timezone.get_fixed_timezone(delta).utcoffset(None), delta)

    def test_fixedoffset_negative_timedelta(self):
        delta = datetime.timedelta(hours=-2)
        self.assertEqual(timezone.get_fixed_timezone(delta).utcoffset(None), delta)