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# -*- coding: ascii -*-
'''
$Id: test_tzinfo.py,v 1.9 2004/10/25 04:14:00 zenzen Exp $
'''
__rcs_id__ = '$Id: test_tzinfo.py,v 1.9 2004/10/25 04:14:00 zenzen Exp $'
__version__ = '$Revision: 1.9 $'[11:-2]
import sys, os
sys.path.insert(0, os.pardir)
import unittest, doctest
from datetime import datetime, tzinfo, timedelta
import pytz, reference
fmt = '%Y-%m-%d %H:%M:%S %Z%z'
NOTIME = timedelta(0)
UTC = pytz.timezone('UTC')
REF_UTC = reference.UTC
class BasicTest(unittest.TestCase):
def testUTC(self):
now = datetime.now(tz=UTC)
self.failUnless(now.utcoffset() == NOTIME)
self.failUnless(now.dst() == NOTIME)
self.failUnless(now.timetuple() == now.utctimetuple())
def testReferenceUTC(self):
now = datetime.now(tz=REF_UTC)
self.failUnless(now.utcoffset() == NOTIME)
self.failUnless(now.dst() == NOTIME)
self.failUnless(now.timetuple() == now.utctimetuple())
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):
dt = utc_dt.astimezone(self.tzinfo)
self.failUnlessEqual(dt.tzname(),wanted['tzname'],
'Expected %s as tzname for %s. Got %s' % (
wanted['tzname'],str(utc_dt),dt.tzname()
)
)
def _test_utcoffset(self, utc_dt, wanted):
utcoffset = wanted['utcoffset']
dt = utc_dt.astimezone(self.tzinfo)
self.failUnlessEqual(
dt.utcoffset(),utcoffset,
'Expected %s as utcoffset for %s. Got %s' % (
utcoffset,utc_dt,dt.utcoffset()
)
)
return
dt_wanted = utc_dt.replace(tzinfo=None) + utcoffset
dt_got = dt.replace(tzinfo=None)
self.failUnlessEqual(
dt_wanted,
dt_got,
'Got %s. Wanted %s' % (str(dt_got),str(dt_wanted))
)
def _test_dst(self, utc_dt, wanted):
dst = wanted['dst']
dt = utc_dt.astimezone(self.tzinfo)
self.failUnlessEqual(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.failUnlessEqual(dt, dt2)
# Make sure arithmetic crossing DST boundaries ends
# up in the correct timezone after normalization
self.failUnlessEqual(
(utc_dt + delta).astimezone(self.tzinfo).strftime(fmt),
self.tzinfo.normalize(dt + delta).strftime(fmt),
'Incorrect result for delta==%d days. Wanted %r. Got %r'%(
days,
(utc_dt + delta).astimezone(self.tzinfo).strftime(fmt),
self.tzinfo.normalize(dt + delta).strftime(fmt),
)
)
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 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 savings transition is one hour out. For example,
# at the end of US/Eastern daylight savings 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.failUnlessEqual(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.failUnlessEqual(loc_time.strftime('%Z%z'), 'NST+0120')
loc_time = loc_tz.localize(datetime(1940, 5, 10, 0, 0, 0))
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'NET+0020')
loc_time = loc_tz.localize(datetime(1940, 5, 20, 0, 0, 0))
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'CEST+0200')
loc_time = loc_tz.localize(datetime(2004, 2, 1, 0, 0, 0))
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'CET+0100')
loc_time = loc_tz.localize(datetime(2004, 4, 1, 0, 0, 0))
self.failUnlessEqual(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.failUnlessEqual(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.failUnlessEqual(loc_time.strftime('%Z%z'), 'EDT-0400')
loc_time = loc_tz.localize(datetime(1918, 10, 27, 1, 59, 59), is_dst=0)
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'EST-0500')
self.failUnlessRaises(pytz.AmbiguousTimeError,
loc_tz.localize, datetime(1918, 10, 27, 1, 59, 59), 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.failUnlessEqual(loc_time.strftime('%Z%z'), 'EWT-0400')
loc_time = loc_tz.localize(datetime(1945, 8, 14, 19, 0, 0))
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'EPT-0400')
loc_time = loc_tz.localize(datetime(1945, 9, 30, 1, 0, 0), is_dst=1)
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'EPT-0400')
loc_time = loc_tz.localize(datetime(1945, 9, 30, 1, 0, 0), is_dst=0)
self.failUnlessEqual(loc_time.strftime('%Z%z'), 'EST-0500')
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.failUnlessEqual(
dt2.strftime('%Y-%m-%d %H:%M:%S %Z%z'),
'2004-04-04 02:50:00 EDT-0400'
)
dt2 = tz.normalize(dt2)
self.failUnlessEqual(
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.failUnlessEqual(
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.failUnlessEqual(
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.failUnlessEqual(
dt.strftime(fmt),
'2004-10-31 02:00:00 CET+0100'
)
def test_suite():
suite = unittest.TestSuite()
suite.addTest(doctest.DocTestSuite('pytz'))
suite.addTest(doctest.DocTestSuite('pytz.tzinfo'))
suite.addTest(unittest.defaultTestLoader.loadTestsFromModule(
__import__('__main__')
))
return suite
if __name__ == '__main__':
suite = test_suite()
if '-v' in sys.argv:
runner = unittest.TextTestRunner(verbosity=2)
else:
runner = unittest.TextTestRunner()
runner.run(suite)
# vim: set filetype=python ts=4 sw=4 et
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