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import copy
import datetime
import pickle
import unittest
from django.test import override_settings
from django.utils import timezone
try:
import pytz
except ImportError:
pytz = None
requires_pytz = unittest.skipIf(pytz is None, "this test requires pytz")
if pytz is not None:
CET = pytz.timezone("Europe/Paris")
EAT = timezone.get_fixed_timezone(180) # Africa/Nairobi
ICT = timezone.get_fixed_timezone(420) # Asia/Bangkok
class TimezoneTests(unittest.TestCase):
def test_localtime(self):
now = datetime.datetime.utcnow().replace(tzinfo=timezone.utc)
local_tz = timezone.LocalTimezone()
local_now = timezone.localtime(now, local_tz)
self.assertEqual(local_now.tzinfo, local_tz)
def test_localtime_naive(self):
with self.assertRaises(ValueError):
timezone.localtime(datetime.datetime.now())
def test_localtime_out_of_range(self):
local_tz = timezone.LocalTimezone()
long_ago = datetime.datetime(1900, 1, 1, tzinfo=timezone.utc)
try:
timezone.localtime(long_ago, local_tz)
except (OverflowError, ValueError) as exc:
self.assertIn("install pytz", exc.args[0])
else:
raise unittest.SkipTest("Failed to trigger an OverflowError or ValueError")
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_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_copy(self):
self.assertIsInstance(copy.copy(timezone.UTC()), timezone.UTC)
self.assertIsInstance(copy.copy(timezone.LocalTimezone()), timezone.LocalTimezone)
def test_deepcopy(self):
self.assertIsInstance(copy.deepcopy(timezone.UTC()), timezone.UTC)
self.assertIsInstance(copy.deepcopy(timezone.LocalTimezone()), timezone.LocalTimezone)
def test_pickling_unpickling(self):
self.assertIsInstance(pickle.loads(pickle.dumps(timezone.UTC())), timezone.UTC)
self.assertIsInstance(pickle.loads(pickle.dumps(timezone.LocalTimezone())), timezone.LocalTimezone)
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.assertRaises(ValueError):
timezone.make_naive(datetime.datetime(2011, 9, 1, 13, 20, 30), EAT)
@requires_pytz
def test_make_aware2(self):
self.assertEqual(
timezone.make_aware(datetime.datetime(2011, 9, 1, 12, 20, 30), CET),
CET.localize(datetime.datetime(2011, 9, 1, 12, 20, 30)))
with self.assertRaises(ValueError):
timezone.make_aware(CET.localize(datetime.datetime(2011, 9, 1, 12, 20, 30)), CET)
@requires_pytz
def test_make_aware_pytz(self):
self.assertEqual(
timezone.make_naive(CET.localize(datetime.datetime(2011, 9, 1, 12, 20, 30)), CET),
datetime.datetime(2011, 9, 1, 12, 20, 30))
self.assertEqual(
timezone.make_naive(
pytz.timezone("Asia/Bangkok").localize(datetime.datetime(2011, 9, 1, 17, 20, 30)), CET
),
datetime.datetime(2011, 9, 1, 12, 20, 30))
with self.assertRaises(ValueError):
timezone.make_naive(datetime.datetime(2011, 9, 1, 12, 20, 30), CET)
@requires_pytz
def test_make_aware_pytz_ambiguous(self):
# 2:30 happens twice, once before DST ends and once after
ambiguous = datetime.datetime(2015, 10, 25, 2, 30)
with self.assertRaises(pytz.AmbiguousTimeError):
timezone.make_aware(ambiguous, timezone=CET)
std = timezone.make_aware(ambiguous, timezone=CET, is_dst=False)
dst = timezone.make_aware(ambiguous, timezone=CET, is_dst=True)
self.assertEqual(std - dst, datetime.timedelta(hours=1))
self.assertEqual(std.tzinfo.utcoffset(std), datetime.timedelta(hours=1))
self.assertEqual(dst.tzinfo.utcoffset(dst), datetime.timedelta(hours=2))
@requires_pytz
def test_make_aware_pytz_non_existent(self):
# 2:30 never happened due to DST
non_existent = datetime.datetime(2015, 3, 29, 2, 30)
with self.assertRaises(pytz.NonExistentTimeError):
timezone.make_aware(non_existent, timezone=CET)
std = timezone.make_aware(non_existent, timezone=CET, is_dst=False)
dst = timezone.make_aware(non_existent, timezone=CET, is_dst=True)
self.assertEqual(std - dst, datetime.timedelta(hours=1))
self.assertEqual(std.tzinfo.utcoffset(std), datetime.timedelta(hours=1))
self.assertEqual(dst.tzinfo.utcoffset(dst), datetime.timedelta(hours=2))
# round trip to UTC then back to CET
std = timezone.localtime(timezone.localtime(std, timezone.UTC()), CET)
dst = timezone.localtime(timezone.localtime(dst, timezone.UTC()), CET)
self.assertEqual((std.hour, std.minute), (3, 30))
self.assertEqual((dst.hour, dst.minute), (1, 30))
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