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bazarr/libs/pytz/tests/test_tzinfo.py

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update deps
2018-11-01 00:08:29 +08:00
# -*- coding: ascii -*-
import sys, os, os.path
import unittest, doctest
try:
import cPickle as pickle
except ImportError:
import pickle
from datetime import datetime, time, timedelta, tzinfo
import warnings
if __name__ == '__main__':
# Only munge path if invoked as a script. Testrunners should have setup
# the paths already
sys.path.insert(0, os.path.abspath(os.path.join(os.pardir, os.pardir)))
import pytz
from pytz import reference
from pytz.tzfile import _byte_string
from pytz.tzinfo import DstTzInfo, StaticTzInfo
# I test for expected version to ensure the correct version of pytz is
# actually being tested.
EXPECTED_VERSION='2017.2'
EXPECTED_OLSON_VERSION='2017b'
fmt = '%Y-%m-%d %H:%M:%S %Z%z'
NOTIME = timedelta(0)
# GMT is a tzinfo.StaticTzInfo--the class we primarily want to test--while
# UTC is reference implementation. They both have the same timezone meaning.
UTC = pytz.timezone('UTC')
GMT = pytz.timezone('GMT')
assert isinstance(GMT, StaticTzInfo), 'GMT is no longer a StaticTzInfo'
def prettydt(dt):
"""datetime as a string using a known format.
We don't use strftime as it doesn't handle years earlier than 1900
per http://bugs.python.org/issue1777412
"""
if dt.utcoffset() >= timedelta(0):
offset = '+%s' % (dt.utcoffset(),)
else:
offset = '-%s' % (-1 * dt.utcoffset(),)
return '%04d-%02d-%02d %02d:%02d:%02d %s %s' % (
dt.year, dt.month, dt.day,
dt.hour, dt.minute, dt.second,
dt.tzname(), offset)
try:
unicode
except NameError:
# Python 3.x doesn't have unicode(), making writing code
# for Python 2.3 and Python 3.x a pain.
unicode = str
class BasicTest(unittest.TestCase):
def testVersion(self):
# Ensuring the correct version of pytz has been loaded
self.assertEqual(EXPECTED_VERSION, pytz.__version__,
'Incorrect pytz version loaded. Import path is stuffed '
'or this test needs updating. (Wanted %s, got %s)'
% (EXPECTED_VERSION, pytz.__version__))
self.assertEqual(EXPECTED_OLSON_VERSION, pytz.OLSON_VERSION,
'Incorrect pytz version loaded. Import path is stuffed '
'or this test needs updating. (Wanted %s, got %s)'
% (EXPECTED_OLSON_VERSION, pytz.OLSON_VERSION))
def testGMT(self):
now = datetime.now(tz=GMT)
self.assertTrue(now.utcoffset() == NOTIME)
self.assertTrue(now.dst() == NOTIME)
self.assertTrue(now.timetuple() == now.utctimetuple())
self.assertTrue(now==now.replace(tzinfo=UTC))
def testReferenceUTC(self):
now = datetime.now(tz=UTC)
self.assertTrue(now.utcoffset() == NOTIME)
self.assertTrue(now.dst() == NOTIME)
self.assertTrue(now.timetuple() == now.utctimetuple())
def testUnknownOffsets(self):
# This tzinfo behavior is required to make
# datetime.time.{utcoffset, dst, tzname} work as documented.
dst_tz = pytz.timezone('US/Eastern')
# This information is not known when we don't have a date,
# so return None per API.
self.assertTrue(dst_tz.utcoffset(None) is None)
self.assertTrue(dst_tz.dst(None) is None)
# We don't know the abbreviation, but this is still a valid
# tzname per the Python documentation.
self.assertEqual(dst_tz.tzname(None), 'US/Eastern')
def clearCache(self):
pytz._tzinfo_cache.clear()
def testUnicodeTimezone(self):
# We need to ensure that cold lookups work for both Unicode
# and traditional strings, and that the desired singleton is
# returned.
self.clearCache()
eastern = pytz.timezone(unicode('US/Eastern'))
self.assertTrue(eastern is pytz.timezone('US/Eastern'))
self.clearCache()
eastern = pytz.timezone('US/Eastern')
self.assertTrue(eastern is pytz.timezone(unicode('US/Eastern')))
def testStaticTzInfo(self):
# Ensure that static timezones are correctly detected,
# per lp:1602807
static = pytz.timezone('Etc/GMT-4')
self.assertTrue(isinstance(static, StaticTzInfo))
class PicklingTest(unittest.TestCase):
def _roundtrip_tzinfo(self, tz):
p = pickle.dumps(tz)
unpickled_tz = pickle.loads(p)
self.assertTrue(tz is unpickled_tz, '%s did not roundtrip' % tz.zone)
def _roundtrip_datetime(self, dt):
# Ensure that the tzinfo attached to a datetime instance
# is identical to the one returned. This is important for
# DST timezones, as some state is stored in the tzinfo.
tz = dt.tzinfo
p = pickle.dumps(dt)
unpickled_dt = pickle.loads(p)
unpickled_tz = unpickled_dt.tzinfo
self.assertTrue(tz is unpickled_tz, '%s did not roundtrip' % tz.zone)
def testDst(self):
tz = pytz.timezone('Europe/Amsterdam')
dt = datetime(2004, 2, 1, 0, 0, 0)
for localized_tz in tz._tzinfos.values():
self._roundtrip_tzinfo(localized_tz)
self._roundtrip_datetime(dt.replace(tzinfo=localized_tz))
def testRoundtrip(self):
dt = datetime(2004, 2, 1, 0, 0, 0)
for zone in pytz.all_timezones:
tz = pytz.timezone(zone)
self._roundtrip_tzinfo(tz)
def testDatabaseFixes(self):
# Hack the pickle to make it refer to a timezone abbreviation
# that does not match anything. The unpickler should be able
# to repair this case
tz = pytz.timezone('Australia/Melbourne')
p = pickle.dumps(tz)
tzname = tz._tzname
hacked_p = p.replace(_byte_string(tzname),
_byte_string('?'*len(tzname)))
self.assertNotEqual(p, hacked_p)
unpickled_tz = pickle.loads(hacked_p)
self.assertTrue(tz is unpickled_tz)
# Simulate a database correction. In this case, the incorrect
# data will continue to be used.
p = pickle.dumps(tz)
new_utcoffset = tz._utcoffset.seconds + 42
# Python 3 introduced a new pickle protocol where numbers are stored in
# hexadecimal representation. Here we extract the pickle
# representation of the number for the current Python version.
old_pickle_pattern = pickle.dumps(tz._utcoffset.seconds)[3:-1]
new_pickle_pattern = pickle.dumps(new_utcoffset)[3:-1]
hacked_p = p.replace(old_pickle_pattern, new_pickle_pattern)
self.assertNotEqual(p, hacked_p)
unpickled_tz = pickle.loads(hacked_p)
self.assertEqual(unpickled_tz._utcoffset.seconds, new_utcoffset)
self.assertTrue(tz is not unpickled_tz)
def testOldPickles(self):
# Ensure that applications serializing pytz instances as pickles
# have no troubles upgrading to a new pytz release. These pickles
# where created with pytz2006j
east1 = pickle.loads(_byte_string(
"cpytz\n_p\np1\n(S'US/Eastern'\np2\nI-18000\n"
"I0\nS'EST'\np3\ntRp4\n."
))
east2 = pytz.timezone('US/Eastern').localize(
datetime(2006, 1, 1)).tzinfo
self.assertTrue(east1 is east2)
# Confirm changes in name munging between 2006j and 2007c cause
# no problems.
pap1 = pickle.loads(_byte_string(
"cpytz\n_p\np1\n(S'America/Port_minus_au_minus_Prince'"
"\np2\nI-17340\nI0\nS'PPMT'\np3\ntRp4\n."))
pap2 = pytz.timezone('America/Port-au-Prince').localize(
datetime(1910, 1, 1)).tzinfo
self.assertTrue(pap1 is pap2)
gmt1 = pickle.loads(_byte_string(
"cpytz\n_p\np1\n(S'Etc/GMT_plus_10'\np2\ntRp3\n."))
gmt2 = pytz.timezone('Etc/GMT+10')
self.assertTrue(gmt1 is gmt2)
class USEasternDSTStartTestCase(unittest.TestCase):
tzinfo = pytz.timezone('US/Eastern')
# 24 hours before DST changeover
transition_time = datetime(2002, 4, 7, 7, 0, 0, tzinfo=UTC)
# Increase for 'flexible' DST transitions due to 1 minute granularity
# of Python's datetime library
instant = timedelta(seconds=1)
# before transition
before = {
'tzname': 'EST',
'utcoffset': timedelta(hours = -5),
'dst': timedelta(hours = 0),
}
# after transition
after = {
'tzname': 'EDT',
'utcoffset': timedelta(hours = -4),
'dst': timedelta(hours = 1),
}
def _test_tzname(self, utc_dt, wanted):
tzname = wanted['tzname']
dt = utc_dt.astimezone(self.tzinfo)
self.assertEqual(dt.tzname(), tzname,
'Expected %s as tzname for %s. Got %s' % (
tzname, str(utc_dt), dt.tzname()
)
)
def _test_utcoffset(self, utc_dt, wanted):
utcoffset = wanted['utcoffset']
dt = utc_dt.astimezone(self.tzinfo)
self.assertEqual(
dt.utcoffset(), wanted['utcoffset'],
'Expected %s as utcoffset for %s. Got %s' % (
utcoffset, utc_dt, dt.utcoffset()
)
)
def _test_dst(self, utc_dt, wanted):
dst = wanted['dst']
dt = utc_dt.astimezone(self.tzinfo)
self.assertEqual(dt.dst(),dst,
'Expected %s as dst for %s. Got %s' % (
dst, utc_dt, dt.dst()
)
)
def test_arithmetic(self):
utc_dt = self.transition_time
for days in range(-420, 720, 20):
delta = timedelta(days=days)
# Make sure we can get back where we started
dt = utc_dt.astimezone(self.tzinfo)
dt2 = dt + delta
dt2 = dt2 - delta
self.assertEqual(dt, dt2)
# Make sure arithmetic crossing DST boundaries ends
# up in the correct timezone after normalization
utc_plus_delta = (utc_dt + delta).astimezone(self.tzinfo)
local_plus_delta = self.tzinfo.normalize(dt + delta)
self.assertEqual(
prettydt(utc_plus_delta),
prettydt(local_plus_delta),
'Incorrect result for delta==%d days. Wanted %r. Got %r'%(
days,
prettydt(utc_plus_delta),
prettydt(local_plus_delta),
)
)
def _test_all(self, utc_dt, wanted):
self._test_utcoffset(utc_dt, wanted)
self._test_tzname(utc_dt, wanted)
self._test_dst(utc_dt, wanted)
def testDayBefore(self):
self._test_all(
self.transition_time - timedelta(days=1), self.before
)
def testTwoHoursBefore(self):
self._test_all(
self.transition_time - timedelta(hours=2), self.before
)
def testHourBefore(self):
self._test_all(
self.transition_time - timedelta(hours=1), self.before
)
def testInstantBefore(self):
self._test_all(
self.transition_time - self.instant, self.before
)
def testTransition(self):
self._test_all(
self.transition_time, self.after
)
def testInstantAfter(self):
self._test_all(
self.transition_time + self.instant, self.after
)
def testHourAfter(self):
self._test_all(
self.transition_time + timedelta(hours=1), self.after
)
def testTwoHoursAfter(self):
self._test_all(
self.transition_time + timedelta(hours=1), self.after
)
def testDayAfter(self):
self._test_all(
self.transition_time + timedelta(days=1), self.after
)
class USEasternDSTEndTestCase(USEasternDSTStartTestCase):
tzinfo = pytz.timezone('US/Eastern')
transition_time = datetime(2002, 10, 27, 6, 0, 0, tzinfo=UTC)
before = {
'tzname': 'EDT',
'utcoffset': timedelta(hours = -4),
'dst': timedelta(hours = 1),
}
after = {
'tzname': 'EST',
'utcoffset': timedelta(hours = -5),
'dst': timedelta(hours = 0),
}
class USEasternEPTStartTestCase(USEasternDSTStartTestCase):
transition_time = datetime(1945, 8, 14, 23, 0, 0, tzinfo=UTC)
before = {
'tzname': 'EWT',
'utcoffset': timedelta(hours = -4),
'dst': timedelta(hours = 1),
}
after = {
'tzname': 'EPT',
'utcoffset': timedelta(hours = -4),
'dst': timedelta(hours = 1),
}
class USEasternEPTEndTestCase(USEasternDSTStartTestCase):
transition_time = datetime(1945, 9, 30, 6, 0, 0, tzinfo=UTC)
before = {
'tzname': 'EPT',
'utcoffset': timedelta(hours = -4),
'dst': timedelta(hours = 1),
}
after = {
'tzname': 'EST',
'utcoffset': timedelta(hours = -5),
'dst': timedelta(hours = 0),
}
class WarsawWMTEndTestCase(USEasternDSTStartTestCase):
# In 1915, Warsaw changed from Warsaw to Central European time.
# This involved the clocks being set backwards, causing a end-of-DST
# like situation without DST being involved.
tzinfo = pytz.timezone('Europe/Warsaw')
transition_time = datetime(1915, 8, 4, 22, 36, 0, tzinfo=UTC)
before = {
'tzname': 'WMT',
'utcoffset': timedelta(hours=1, minutes=24),
'dst': timedelta(0),
}
after = {
'tzname': 'CET',
'utcoffset': timedelta(hours=1),
'dst': timedelta(0),
}
class VilniusWMTEndTestCase(USEasternDSTStartTestCase):
# At the end of 1916, Vilnius changed timezones putting its clock
# forward by 11 minutes 35 seconds. Neither timezone was in DST mode.
tzinfo = pytz.timezone('Europe/Vilnius')
instant = timedelta(seconds=31)
transition_time = datetime(1916, 12, 31, 22, 36, 00, tzinfo=UTC)
before = {
'tzname': 'WMT',
'utcoffset': timedelta(hours=1, minutes=24),
'dst': timedelta(0),
}
after = {
'tzname': 'KMT',
'utcoffset': timedelta(hours=1, minutes=36), # Really 1:35:36
'dst': timedelta(0),
}
class VilniusCESTStartTestCase(USEasternDSTStartTestCase):
# In 1941, Vilnius changed from MSG to CEST, switching to summer
# time while simultaneously reducing its UTC offset by two hours,
# causing the clocks to go backwards for this summer time
# switchover.
tzinfo = pytz.timezone('Europe/Vilnius')
transition_time = datetime(1941, 6, 23, 21, 00, 00, tzinfo=UTC)
before = {
'tzname': 'MSK',
'utcoffset': timedelta(hours=3),
'dst': timedelta(0),
}
after = {
'tzname': 'CEST',
'utcoffset': timedelta(hours=2),
'dst': timedelta(hours=1),
}
class LondonHistoryStartTestCase(USEasternDSTStartTestCase):
# The first known timezone transition in London was in 1847 when
# clocks where synchronized to GMT. However, we currently only
# understand v1 format tzfile(5) files which does handle years
# this far in the past, so our earliest known transition is in
# 1916.
tzinfo = pytz.timezone('Europe/London')
# transition_time = datetime(1847, 12, 1, 1, 15, 00, tzinfo=UTC)
# before = {
# 'tzname': 'LMT',
# 'utcoffset': timedelta(minutes=-75),
# 'dst': timedelta(0),
# }
# after = {
# 'tzname': 'GMT',
# 'utcoffset': timedelta(0),
# 'dst': timedelta(0),
# }
transition_time = datetime(1916, 5, 21, 2, 00, 00, tzinfo=UTC)
before = {
'tzname': 'GMT',
'utcoffset': timedelta(0),
'dst': timedelta(0),
}
after = {
'tzname': 'BST',
'utcoffset': timedelta(hours=1),
'dst': timedelta(hours=1),
}
class LondonHistoryEndTestCase(USEasternDSTStartTestCase):
# Timezone switchovers are projected into the future, even
# though no official statements exist or could be believed even
# if they did exist. We currently only check the last known
# transition in 2037, as we are still using v1 format tzfile(5)
# files.
tzinfo = pytz.timezone('Europe/London')
# transition_time = datetime(2499, 10, 25, 1, 0, 0, tzinfo=UTC)
transition_time = datetime(2037, 10, 25, 1, 0, 0, tzinfo=UTC)
before = {
'tzname': 'BST',
'utcoffset': timedelta(hours=1),
'dst': timedelta(hours=1),
}
after = {
'tzname': 'GMT',
'utcoffset': timedelta(0),
'dst': timedelta(0),
}
class NoumeaHistoryStartTestCase(USEasternDSTStartTestCase):
# Noumea adopted a whole hour offset in 1912. Previously
# it was 11 hours, 5 minutes and 48 seconds off UTC. However,
# due to limitations of the Python datetime library, we need
# to round that to 11 hours 6 minutes.
tzinfo = pytz.timezone('Pacific/Noumea')
transition_time = datetime(1912, 1, 12, 12, 54, 12, tzinfo=UTC)
before = {
'tzname': 'LMT',
'utcoffset': timedelta(hours=11, minutes=6),
'dst': timedelta(0),
}
after = {
'tzname': '+11', # pre-2017a, NCT
'utcoffset': timedelta(hours=11),
'dst': timedelta(0),
}
class NoumeaDSTEndTestCase(USEasternDSTStartTestCase):
# Noumea dropped DST in 1997.
tzinfo = pytz.timezone('Pacific/Noumea')
transition_time = datetime(1997, 3, 1, 15, 00, 00, tzinfo=UTC)
before = {
'tzname': '+12', # pre-2017a, NCST
'utcoffset': timedelta(hours=12),
'dst': timedelta(hours=1),
}
after = {
'tzname': '+11', # pre-2017a, NCT
'utcoffset': timedelta(hours=11),
'dst': timedelta(0),
}
class NoumeaNoMoreDSTTestCase(NoumeaDSTEndTestCase):
# Noumea dropped DST in 1997. Here we test that it stops occuring.
transition_time = (
NoumeaDSTEndTestCase.transition_time + timedelta(days=365*10))
before = NoumeaDSTEndTestCase.after
after = NoumeaDSTEndTestCase.after
class TahitiTestCase(USEasternDSTStartTestCase):
# Tahiti has had a single transition in its history.
tzinfo = pytz.timezone('Pacific/Tahiti')
transition_time = datetime(1912, 10, 1, 9, 58, 16, tzinfo=UTC)
before = {
'tzname': 'LMT',
'utcoffset': timedelta(hours=-9, minutes=-58),
'dst': timedelta(0),
}
after = {
'tzname': '-10', # pre-2017a, TAHT
'utcoffset': timedelta(hours=-10),
'dst': timedelta(0),
}
class SamoaInternationalDateLineChange(USEasternDSTStartTestCase):
# At the end of 2011, Samoa will switch from being east of the
# international dateline to the west. There will be no Dec 30th
# 2011 and it will switch from UTC-10 to UTC+14.
tzinfo = pytz.timezone('Pacific/Apia')
transition_time = datetime(2011, 12, 30, 10, 0, 0, tzinfo=UTC)
before = {
'tzname': '-10', # pre-2017a, SDT
'utcoffset': timedelta(hours=-10),
'dst': timedelta(hours=1),
}
after = {
'tzname': '+14', # pre-2017a, WSDT
'utcoffset': timedelta(hours=14),
'dst': timedelta(hours=1),
}
class ReferenceUSEasternDSTStartTestCase(USEasternDSTStartTestCase):
tzinfo = reference.Eastern
def test_arithmetic(self):
# Reference implementation cannot handle this
pass
class ReferenceUSEasternDSTEndTestCase(USEasternDSTEndTestCase):
tzinfo = reference.Eastern
def testHourBefore(self):
# Python's datetime library has a bug, where the hour before
# a daylight saving transition is one hour out. For example,
# at the end of US/Eastern daylight saving time, 01:00 EST
# occurs twice (once at 05:00 UTC and once at 06:00 UTC),
# whereas the first should actually be 01:00 EDT.
# Note that this bug is by design - by accepting this ambiguity
# for one hour one hour per year, an is_dst flag on datetime.time
# became unnecessary.
self._test_all(
self.transition_time - timedelta(hours=1), self.after
)
def testInstantBefore(self):
self._test_all(
self.transition_time - timedelta(seconds=1), self.after
)
def test_arithmetic(self):
# Reference implementation cannot handle this
pass
class LocalTestCase(unittest.TestCase):
def testLocalize(self):
loc_tz = pytz.timezone('Europe/Amsterdam')
loc_time = loc_tz.localize(datetime(1930, 5, 10, 0, 0, 0))
# Actually +00:19:32, but Python datetime rounds this
self.assertEqual(loc_time.strftime('%Z%z'), 'AMT+0020')
loc_time = loc_tz.localize(datetime(1930, 5, 20, 0, 0, 0))
# Actually +00:19:32, but Python datetime rounds this
self.assertEqual(loc_time.strftime('%Z%z'), 'NST+0120')
loc_time = loc_tz.localize(datetime(1940, 5, 10, 0, 0, 0))
# pre-2017a, abbreviation was NCT
self.assertEqual(loc_time.strftime('%Z%z'), '+0020+0020')
loc_time = loc_tz.localize(datetime(1940, 5, 20, 0, 0, 0))
self.assertEqual(loc_time.strftime('%Z%z'), 'CEST+0200')
loc_time = loc_tz.localize(datetime(2004, 2, 1, 0, 0, 0))
self.assertEqual(loc_time.strftime('%Z%z'), 'CET+0100')
loc_time = loc_tz.localize(datetime(2004, 4, 1, 0, 0, 0))
self.assertEqual(loc_time.strftime('%Z%z'), 'CEST+0200')
tz = pytz.timezone('Europe/Amsterdam')
loc_time = loc_tz.localize(datetime(1943, 3, 29, 1, 59, 59))
self.assertEqual(loc_time.strftime('%Z%z'), 'CET+0100')
# Switch to US
loc_tz = pytz.timezone('US/Eastern')
# End of DST ambiguity check
loc_time = loc_tz.localize(datetime(1918, 10, 27, 1, 59, 59), is_dst=1)
self.assertEqual(loc_time.strftime('%Z%z'), 'EDT-0400')
loc_time = loc_tz.localize(datetime(1918, 10, 27, 1, 59, 59), is_dst=0)
self.assertEqual(loc_time.strftime('%Z%z'), 'EST-0500')
self.assertRaises(pytz.AmbiguousTimeError,
loc_tz.localize, datetime(1918, 10, 27, 1, 59, 59), is_dst=None
)
# Start of DST non-existent times
loc_time = loc_tz.localize(datetime(1918, 3, 31, 2, 0, 0), is_dst=0)
self.assertEqual(loc_time.strftime('%Z%z'), 'EST-0500')
loc_time = loc_tz.localize(datetime(1918, 3, 31, 2, 0, 0), is_dst=1)
self.assertEqual(loc_time.strftime('%Z%z'), 'EDT-0400')
self.assertRaises(pytz.NonExistentTimeError,
loc_tz.localize, datetime(1918, 3, 31, 2, 0, 0), is_dst=None
)
# Weird changes - war time and peace time both is_dst==True
loc_time = loc_tz.localize(datetime(1942, 2, 9, 3, 0, 0))
self.assertEqual(loc_time.strftime('%Z%z'), 'EWT-0400')
loc_time = loc_tz.localize(datetime(1945, 8, 14, 19, 0, 0))
self.assertEqual(loc_time.strftime('%Z%z'), 'EPT-0400')
loc_time = loc_tz.localize(datetime(1945, 9, 30, 1, 0, 0), is_dst=1)
self.assertEqual(loc_time.strftime('%Z%z'), 'EPT-0400')
loc_time = loc_tz.localize(datetime(1945, 9, 30, 1, 0, 0), is_dst=0)
self.assertEqual(loc_time.strftime('%Z%z'), 'EST-0500')
# Weird changes - ambiguous time (end-of-DST like) but is_dst==False
for zonename, ambiguous_naive, expected in [
('Europe/Warsaw', datetime(1915, 8, 4, 23, 59, 59),
['1915-08-04 23:59:59 WMT+0124',
'1915-08-04 23:59:59 CET+0100']),
('Europe/Moscow', datetime(2014, 10, 26, 1, 30),
['2014-10-26 01:30:00 MSK+0400',
'2014-10-26 01:30:00 MSK+0300'])]:
loc_tz = pytz.timezone(zonename)
self.assertRaises(pytz.AmbiguousTimeError,
loc_tz.localize, ambiguous_naive, is_dst=None
)
# Also test non-boolean is_dst in the weird case
for dst in [True, timedelta(1), False, timedelta(0)]:
loc_time = loc_tz.localize(ambiguous_naive, is_dst=dst)
self.assertEqual(loc_time.strftime(fmt), expected[not dst])
def testNormalize(self):
tz = pytz.timezone('US/Eastern')
dt = datetime(2004, 4, 4, 7, 0, 0, tzinfo=UTC).astimezone(tz)
dt2 = dt - timedelta(minutes=10)
self.assertEqual(
dt2.strftime('%Y-%m-%d %H:%M:%S %Z%z'),
'2004-04-04 02:50:00 EDT-0400'
)
dt2 = tz.normalize(dt2)
self.assertEqual(
dt2.strftime('%Y-%m-%d %H:%M:%S %Z%z'),
'2004-04-04 01:50:00 EST-0500'
)
def testPartialMinuteOffsets(self):
# utcoffset in Amsterdam was not a whole minute until 1937
# However, we fudge this by rounding them, as the Python
# datetime library
tz = pytz.timezone('Europe/Amsterdam')
utc_dt = datetime(1914, 1, 1, 13, 40, 28, tzinfo=UTC) # correct
utc_dt = utc_dt.replace(second=0) # But we need to fudge it
loc_dt = utc_dt.astimezone(tz)
self.assertEqual(
loc_dt.strftime('%Y-%m-%d %H:%M:%S %Z%z'),
'1914-01-01 14:00:00 AMT+0020'
)
# And get back...
utc_dt = loc_dt.astimezone(UTC)
self.assertEqual(
utc_dt.strftime('%Y-%m-%d %H:%M:%S %Z%z'),
'1914-01-01 13:40:00 UTC+0000'
)
def no_testCreateLocaltime(self):
# It would be nice if this worked, but it doesn't.
tz = pytz.timezone('Europe/Amsterdam')
dt = datetime(2004, 10, 31, 2, 0, 0, tzinfo=tz)
self.assertEqual(
dt.strftime(fmt),
'2004-10-31 02:00:00 CET+0100'
)
class CommonTimezonesTestCase(unittest.TestCase):
def test_bratislava(self):
# Bratislava is the default timezone for Slovakia, but our
# heuristics where not adding it to common_timezones. Ideally,
# common_timezones should be populated from zone.tab at runtime,
# but I'm hesitant to pay the startup cost as loading the list
# on demand whilst remaining backwards compatible seems
# difficult.
self.assertTrue('Europe/Bratislava' in pytz.common_timezones)
self.assertTrue('Europe/Bratislava' in pytz.common_timezones_set)
def test_us_eastern(self):
self.assertTrue('US/Eastern' in pytz.common_timezones)
self.assertTrue('US/Eastern' in pytz.common_timezones_set)
def test_belfast(self):
# Belfast uses London time.
self.assertTrue('Europe/Belfast' in pytz.all_timezones_set)
self.assertFalse('Europe/Belfast' in pytz.common_timezones)
self.assertFalse('Europe/Belfast' in pytz.common_timezones_set)
class BaseTzInfoTestCase:
'''Ensure UTC, StaticTzInfo and DstTzInfo work consistently.
These tests are run for each type of tzinfo.
'''
tz = None # override
tz_class = None # override
def test_expectedclass(self):
self.assertTrue(isinstance(self.tz, self.tz_class))
def test_fromutc(self):
# naive datetime.
dt1 = datetime(2011, 10, 31)
# localized datetime, same timezone.
dt2 = self.tz.localize(dt1)
# Both should give the same results. Note that the standard
# Python tzinfo.fromutc() only supports the second.
for dt in [dt1, dt2]:
loc_dt = self.tz.fromutc(dt)
loc_dt2 = pytz.utc.localize(dt1).astimezone(self.tz)
self.assertEqual(loc_dt, loc_dt2)
# localized datetime, different timezone.
new_tz = pytz.timezone('Europe/Paris')
self.assertTrue(self.tz is not new_tz)
dt3 = new_tz.localize(dt1)
self.assertRaises(ValueError, self.tz.fromutc, dt3)
def test_normalize(self):
other_tz = pytz.timezone('Europe/Paris')
self.assertTrue(self.tz is not other_tz)
dt = datetime(2012, 3, 26, 12, 0)
other_dt = other_tz.localize(dt)
local_dt = self.tz.normalize(other_dt)
self.assertTrue(local_dt.tzinfo is not other_dt.tzinfo)
self.assertNotEqual(
local_dt.replace(tzinfo=None), other_dt.replace(tzinfo=None))
def test_astimezone(self):
other_tz = pytz.timezone('Europe/Paris')
self.assertTrue(self.tz is not other_tz)
dt = datetime(2012, 3, 26, 12, 0)
other_dt = other_tz.localize(dt)
local_dt = other_dt.astimezone(self.tz)
self.assertTrue(local_dt.tzinfo is not other_dt.tzinfo)
self.assertNotEqual(
local_dt.replace(tzinfo=None), other_dt.replace(tzinfo=None))
class OptimizedUTCTestCase(unittest.TestCase, BaseTzInfoTestCase):
tz = pytz.utc
tz_class = tz.__class__
class LegacyUTCTestCase(unittest.TestCase, BaseTzInfoTestCase):
# Deprecated timezone, but useful for comparison tests.
tz = pytz.timezone('Etc/UTC')
tz_class = StaticTzInfo
class StaticTzInfoTestCase(unittest.TestCase, BaseTzInfoTestCase):
tz = pytz.timezone('GMT')
tz_class = StaticTzInfo
class DstTzInfoTestCase(unittest.TestCase, BaseTzInfoTestCase):
tz = pytz.timezone('Australia/Melbourne')
tz_class = DstTzInfo
def test_suite():
suite = unittest.TestSuite()
suite.addTest(doctest.DocTestSuite('pytz'))
suite.addTest(doctest.DocTestSuite('pytz.tzinfo'))
import test_tzinfo
suite.addTest(unittest.defaultTestLoader.loadTestsFromModule(test_tzinfo))
return suite
if __name__ == '__main__':
warnings.simplefilter("error") # Warnings should be fatal in tests.
unittest.main(defaultTest='test_suite')
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