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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) # Africa/Nairobi
ICT = timezone.get_fixed_timezone(420) # Asia/Bangkok
UTC = datetime.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):
# 2:30 happens twice, once before DST ends and once after
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):
# 2:30 never happened due to DST
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):
"""
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.
"""
tests = [
# datetime.timezone, fixed offset with and without `name`.
(datetime.timezone(datetime.timedelta(hours=10)), "UTC+10:00"),
(
datetime.timezone(datetime.timedelta(hours=10), name="Etc/GMT-10"),
"Etc/GMT-10",
),
# zoneinfo, named and fixed offset.
(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)
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