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import copy
import datetime
import os
import pickle
import time
from django.utils.tzinfo import FixedOffset, LocalTimezone
from django.utils import unittest
class TzinfoTests(unittest.TestCase):
@classmethod
def setUpClass(cls):
cls.old_TZ = os.environ.get('TZ')
os.environ['TZ'] = 'US/Eastern'
try:
# Check if a timezone has been set
time.tzset()
cls.tz_tests = True
except AttributeError:
# No timezone available. Don't run the tests that require a TZ
cls.tz_tests = False
@classmethod
def tearDownClass(cls):
if cls.old_TZ is None:
del os.environ['TZ']
else:
os.environ['TZ'] = cls.old_TZ
# Cleanup - force re-evaluation of TZ environment variable.
if cls.tz_tests:
time.tzset()
def test_fixedoffset(self):
self.assertEqual(repr(FixedOffset(0)), '+0000')
self.assertEqual(repr(FixedOffset(60)), '+0100')
self.assertEqual(repr(FixedOffset(-60)), '-0100')
self.assertEqual(repr(FixedOffset(280)), '+0440')
self.assertEqual(repr(FixedOffset(-280)), '-0440')
self.assertEqual(repr(FixedOffset(-78.4)), '-0118')
self.assertEqual(repr(FixedOffset(78.4)), '+0118')
self.assertEqual(repr(FixedOffset(-5.5*60)), '-0530')
self.assertEqual(repr(FixedOffset(5.5*60)), '+0530')
self.assertEqual(repr(FixedOffset(-.5*60)), '-0030')
self.assertEqual(repr(FixedOffset(.5*60)), '+0030')
def test_16899(self):
if not self.tz_tests:
return
ts = 1289106000
# Midnight at the end of DST in US/Eastern: 2010-11-07T05:00:00Z
dt = datetime.datetime.utcfromtimestamp(ts)
# US/Eastern -- we force its representation to "EST"
tz = LocalTimezone(dt + datetime.timedelta(days=1))
self.assertEqual(
repr(datetime.datetime.fromtimestamp(ts - 3600, tz)),
'datetime.datetime(2010, 11, 7, 0, 0, tzinfo=EST)')
self.assertEqual(
repr(datetime.datetime.fromtimestamp(ts, tz)),
'datetime.datetime(2010, 11, 7, 1, 0, tzinfo=EST)')
self.assertEqual(
repr(datetime.datetime.fromtimestamp(ts + 3600, tz)),
'datetime.datetime(2010, 11, 7, 1, 0, tzinfo=EST)')
def test_copy(self):
now = datetime.datetime.now()
self.assertIsInstance(copy.copy(FixedOffset(90)), FixedOffset)
self.assertIsInstance(copy.copy(LocalTimezone(now)), LocalTimezone)
def test_deepcopy(self):
now = datetime.datetime.now()
self.assertIsInstance(copy.deepcopy(FixedOffset(90)), FixedOffset)
self.assertIsInstance(copy.deepcopy(LocalTimezone(now)), LocalTimezone)
def test_pickling_unpickling(self):
now = datetime.datetime.now()
self.assertIsInstance(pickle.loads(pickle.dumps(FixedOffset(90))), FixedOffset)
self.assertIsInstance(pickle.loads(pickle.dumps(LocalTimezone(now))), LocalTimezone)
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