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231 lines
9.5 KiB
Python
231 lines
9.5 KiB
Python
import copy
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import datetime
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import pickle
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import sys
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import unittest
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from django.test import SimpleTestCase, mock, override_settings
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from django.utils import timezone
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try:
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import pytz
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except ImportError:
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pytz = None
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requires_pytz = unittest.skipIf(pytz is None, "this test requires pytz")
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if pytz is not None:
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CET = pytz.timezone("Europe/Paris")
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EAT = timezone.get_fixed_timezone(180) # Africa/Nairobi
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ICT = timezone.get_fixed_timezone(420) # Asia/Bangkok
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PY36 = sys.version_info >= (3, 6)
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class TimezoneTests(SimpleTestCase):
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def test_localtime(self):
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now = datetime.datetime.utcnow().replace(tzinfo=timezone.utc)
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local_tz = timezone.LocalTimezone()
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with timezone.override(local_tz):
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local_now = timezone.localtime(now)
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self.assertEqual(local_now.tzinfo, local_tz)
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local_now = timezone.localtime(now, timezone=local_tz)
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self.assertEqual(local_now.tzinfo, local_tz)
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def test_localtime_naive(self):
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now = datetime.datetime.now()
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if PY36:
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self.assertEqual(timezone.localtime(now), now.replace(tzinfo=timezone.LocalTimezone()))
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else:
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with self.assertRaisesMessage(ValueError, 'astimezone() cannot be applied to a naive datetime'):
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timezone.localtime(now)
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def test_localtime_out_of_range(self):
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local_tz = timezone.LocalTimezone()
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long_ago = datetime.datetime(1900, 1, 1, tzinfo=timezone.utc)
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try:
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timezone.localtime(long_ago, local_tz)
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except (OverflowError, ValueError) as exc:
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self.assertIn("install pytz", exc.args[0])
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else:
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self.skipTest("Failed to trigger an OverflowError or ValueError")
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def test_now(self):
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with override_settings(USE_TZ=True):
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self.assertTrue(timezone.is_aware(timezone.now()))
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with override_settings(USE_TZ=False):
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self.assertTrue(timezone.is_naive(timezone.now()))
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def test_localdate(self):
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naive = datetime.datetime(2015, 1, 1, 0, 0, 1)
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if PY36:
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self.assertEqual(timezone.localdate(naive), datetime.date(2015, 1, 1))
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self.assertEqual(timezone.localdate(naive, timezone=EAT), datetime.date(2015, 1, 1))
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else:
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with self.assertRaisesMessage(ValueError, 'astimezone() cannot be applied to a naive datetime'):
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timezone.localdate(naive)
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with self.assertRaisesMessage(ValueError, 'astimezone() cannot be applied to a naive datetime'):
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timezone.localdate(naive, timezone=EAT)
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aware = datetime.datetime(2015, 1, 1, 0, 0, 1, tzinfo=ICT)
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self.assertEqual(timezone.localdate(aware, timezone=EAT), datetime.date(2014, 12, 31))
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with timezone.override(EAT):
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self.assertEqual(timezone.localdate(aware), datetime.date(2014, 12, 31))
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with mock.patch('django.utils.timezone.now', return_value=aware):
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self.assertEqual(timezone.localdate(timezone=EAT), datetime.date(2014, 12, 31))
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with timezone.override(EAT):
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self.assertEqual(timezone.localdate(), datetime.date(2014, 12, 31))
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def test_override(self):
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default = timezone.get_default_timezone()
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try:
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timezone.activate(ICT)
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with timezone.override(EAT):
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self.assertIs(EAT, timezone.get_current_timezone())
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self.assertIs(ICT, timezone.get_current_timezone())
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with timezone.override(None):
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self.assertIs(default, timezone.get_current_timezone())
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self.assertIs(ICT, timezone.get_current_timezone())
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timezone.deactivate()
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with timezone.override(EAT):
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self.assertIs(EAT, timezone.get_current_timezone())
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self.assertIs(default, timezone.get_current_timezone())
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with timezone.override(None):
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self.assertIs(default, timezone.get_current_timezone())
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self.assertIs(default, timezone.get_current_timezone())
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finally:
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timezone.deactivate()
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def test_override_decorator(self):
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default = timezone.get_default_timezone()
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@timezone.override(EAT)
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def func_tz_eat():
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self.assertIs(EAT, timezone.get_current_timezone())
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@timezone.override(None)
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def func_tz_none():
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self.assertIs(default, timezone.get_current_timezone())
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try:
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timezone.activate(ICT)
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func_tz_eat()
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self.assertIs(ICT, timezone.get_current_timezone())
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func_tz_none()
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self.assertIs(ICT, timezone.get_current_timezone())
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timezone.deactivate()
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func_tz_eat()
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self.assertIs(default, timezone.get_current_timezone())
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func_tz_none()
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self.assertIs(default, timezone.get_current_timezone())
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finally:
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timezone.deactivate()
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def test_copy(self):
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self.assertIsInstance(copy.copy(timezone.UTC()), timezone.UTC)
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self.assertIsInstance(copy.copy(timezone.LocalTimezone()), timezone.LocalTimezone)
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def test_deepcopy(self):
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self.assertIsInstance(copy.deepcopy(timezone.UTC()), timezone.UTC)
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self.assertIsInstance(copy.deepcopy(timezone.LocalTimezone()), timezone.LocalTimezone)
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def test_pickling_unpickling(self):
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self.assertIsInstance(pickle.loads(pickle.dumps(timezone.UTC())), timezone.UTC)
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self.assertIsInstance(pickle.loads(pickle.dumps(timezone.LocalTimezone())), timezone.LocalTimezone)
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def test_is_aware(self):
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self.assertTrue(timezone.is_aware(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT)))
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self.assertFalse(timezone.is_aware(datetime.datetime(2011, 9, 1, 13, 20, 30)))
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def test_is_naive(self):
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self.assertFalse(timezone.is_naive(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT)))
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self.assertTrue(timezone.is_naive(datetime.datetime(2011, 9, 1, 13, 20, 30)))
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def test_make_aware(self):
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self.assertEqual(
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timezone.make_aware(datetime.datetime(2011, 9, 1, 13, 20, 30), EAT),
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datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT))
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with self.assertRaises(ValueError):
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timezone.make_aware(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT), EAT)
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def test_make_naive(self):
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self.assertEqual(
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timezone.make_naive(datetime.datetime(2011, 9, 1, 13, 20, 30, tzinfo=EAT), EAT),
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datetime.datetime(2011, 9, 1, 13, 20, 30))
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self.assertEqual(
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timezone.make_naive(datetime.datetime(2011, 9, 1, 17, 20, 30, tzinfo=ICT), EAT),
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datetime.datetime(2011, 9, 1, 13, 20, 30))
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args = (datetime.datetime(2011, 9, 1, 13, 20, 30), EAT)
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if PY36:
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self.assertEqual(timezone.make_naive(*args), datetime.datetime(2011, 9, 1, 21, 20, 30))
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else:
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with self.assertRaisesMessage(ValueError, 'astimezone() cannot be applied to a naive datetime'):
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timezone.make_naive(*args)
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@requires_pytz
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def test_make_aware2(self):
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self.assertEqual(
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timezone.make_aware(datetime.datetime(2011, 9, 1, 12, 20, 30), CET),
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CET.localize(datetime.datetime(2011, 9, 1, 12, 20, 30)))
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with self.assertRaises(ValueError):
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timezone.make_aware(CET.localize(datetime.datetime(2011, 9, 1, 12, 20, 30)), CET)
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@requires_pytz
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def test_make_aware_pytz(self):
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self.assertEqual(
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timezone.make_naive(CET.localize(datetime.datetime(2011, 9, 1, 12, 20, 30)), CET),
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datetime.datetime(2011, 9, 1, 12, 20, 30))
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self.assertEqual(
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timezone.make_naive(
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pytz.timezone("Asia/Bangkok").localize(datetime.datetime(2011, 9, 1, 17, 20, 30)), CET
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),
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datetime.datetime(2011, 9, 1, 12, 20, 30))
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with self.assertRaises(ValueError):
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timezone.make_naive(datetime.datetime(2011, 9, 1, 12, 20, 30), CET)
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@requires_pytz
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def test_make_aware_pytz_ambiguous(self):
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# 2:30 happens twice, once before DST ends and once after
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ambiguous = datetime.datetime(2015, 10, 25, 2, 30)
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with self.assertRaises(pytz.AmbiguousTimeError):
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timezone.make_aware(ambiguous, timezone=CET)
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std = timezone.make_aware(ambiguous, timezone=CET, is_dst=False)
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dst = timezone.make_aware(ambiguous, timezone=CET, is_dst=True)
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self.assertEqual(std - dst, datetime.timedelta(hours=1))
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self.assertEqual(std.tzinfo.utcoffset(std), datetime.timedelta(hours=1))
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self.assertEqual(dst.tzinfo.utcoffset(dst), datetime.timedelta(hours=2))
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@requires_pytz
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def test_make_aware_pytz_non_existent(self):
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# 2:30 never happened due to DST
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non_existent = datetime.datetime(2015, 3, 29, 2, 30)
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with self.assertRaises(pytz.NonExistentTimeError):
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timezone.make_aware(non_existent, timezone=CET)
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std = timezone.make_aware(non_existent, timezone=CET, is_dst=False)
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dst = timezone.make_aware(non_existent, timezone=CET, is_dst=True)
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self.assertEqual(std - dst, datetime.timedelta(hours=1))
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self.assertEqual(std.tzinfo.utcoffset(std), datetime.timedelta(hours=1))
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self.assertEqual(dst.tzinfo.utcoffset(dst), datetime.timedelta(hours=2))
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# round trip to UTC then back to CET
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std = timezone.localtime(timezone.localtime(std, timezone.UTC()), CET)
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dst = timezone.localtime(timezone.localtime(dst, timezone.UTC()), CET)
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self.assertEqual((std.hour, std.minute), (3, 30))
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self.assertEqual((dst.hour, dst.minute), (1, 30))
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