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#!/usr/bin/python2.7
import os.path
import sys
sys.path.insert(0, os.path.join('build', 'dist'))
from datetime import datetime, timedelta
import re
from time import strptime
import unittest
import pytz
class ZdumpTestCase(unittest.TestCase):
def utc_to_local_check(self, zone, utc_dt, loc_dt, loc_tzname, is_dst):
loc_tz = pytz.timezone(zone)
self.assertEqual(
utc_dt.astimezone(loc_tz).replace(tzinfo=None),
loc_dt.replace(tzinfo=None)
)
def local_to_utc_check(self, zone, utc_dt, loc_dt, loc_tzname, is_dst):
self.assertEqual(
loc_dt.astimezone(pytz.utc).replace(tzinfo=None),
utc_dt.replace(tzinfo=None)
)
def test_suite():
testcases = []
raw_data = open(
os.path.join(os.path.dirname(__file__), 'zdump.out'), 'r').readlines()
last_zone = None
test_class = None
zdump_line_re = re.compile(r'''(?x)
^([^\s]+) \s+ (.+) \s UT \s+ = \s+ (.+) \s ([^\s]+) \s+
isdst=(0|1) \s+ gmtoff=[\-\d]+ \s*$
''')
for i in range(0, len(raw_data)):
line = raw_data[i]
m = zdump_line_re.search(line)
if m is None:
raise RuntimeError('Dud line %r' % (line,))
zone, utc_string, loc_string, tzname, is_dst = m.groups()
is_dst = bool(int(is_dst))
if zone != last_zone:
classname = zone.replace(
'+', '_plus_').replace('-', '_minus_').replace('/', '_')
test_class = type(classname, (ZdumpTestCase,), {})
testcases.append(test_class)
last_zone = zone
skip_next_local = False
utc_dt = datetime(
*strptime(utc_string, '%a %b %d %H:%M:%S %Y')[:6])
loc_dt = datetime(
*strptime(loc_string, '%a %b %d %H:%M:%S %Y')[:6])
def round_dt(loc_dt, utc_dt):
# Urgh - utcoffset() and dst() have to be rounded to the nearest
# minute, so we need to break our tests to match this limitation
real_offset = loc_dt - utc_dt
secs = real_offset.seconds + real_offset.days * 86400
fake_offset = timedelta(seconds=int((secs + 30) // 60) * 60)
return utc_dt + fake_offset
loc_dt = round_dt(loc_dt, utc_dt)
# If the naive time on the next line is less than on this
# line, and we aren't seeing an end-of-dst transition, then
# we can't do our local->utc tests for either this nor the
# next line since we are in an ambiguous time period (ie.
# we have wound back the clock but don't have differing
# is_dst flags to resolve the ambiguity)
skip_local = skip_next_local
skip_next_local = False
try:
m = zdump_line_re.match(raw_data[i + 1])
except IndexError:
m = None
if m is not None:
(next_zone, next_utc_string, next_loc_string,
next_tzname, next_is_dst) = m.groups()
next_is_dst = bool(int(next_is_dst))
if next_zone == zone and next_is_dst == is_dst:
next_utc_dt = datetime(
*strptime(next_utc_string, '%a %b %d %H:%M:%S %Y')[:6])
next_loc_dt = round_dt(
datetime(*strptime(
next_loc_string, '%a %b %d %H:%M:%S %Y')[:6]),
next_utc_dt)
if next_loc_dt <= loc_dt:
skip_local = True
skip_next_local = True
loc_tz = pytz.timezone(zone)
loc_dt = loc_tz.localize(loc_dt, is_dst)
utc_dt = pytz.utc.localize(utc_dt)
test_name = 'test_utc_to_local_%04d_%02d_%02d_%02d_%02d_%02d' % (
utc_dt.year, utc_dt.month, utc_dt.day,
utc_dt.hour, utc_dt.minute, utc_dt.second)
def test_utc_to_local(
self, zone=zone, utc_dt=utc_dt, loc_dt=loc_dt,
tzname=tzname, is_dst=is_dst):
self.utc_to_local_check(zone, utc_dt, loc_dt, tzname, is_dst)
test_utc_to_local.__name__ = test_name
setattr(test_class, test_name, test_utc_to_local)
if not skip_local:
test_name = 'test_local_to_utc_%04d_%02d_%02d_%02d_%02d_%02d' % (
loc_dt.year, loc_dt.month, loc_dt.day,
loc_dt.hour, loc_dt.minute, loc_dt.second)
if is_dst:
test_name += '_dst'
else:
test_name += '_nodst'
def test_local_to_utc(
self, zone=zone, utc_dt=utc_dt, loc_dt=loc_dt,
tzname=tzname, is_dst=is_dst):
self.local_to_utc_check(zone, utc_dt, loc_dt, tzname, is_dst)
test_local_to_utc.__name__ = test_name
setattr(test_class, test_name, test_local_to_utc)
classname = zone.replace(
'+', '_plus_').replace('-', '_minus_').replace('/', '_')
test_class = type(classname, (ZdumpTestCase,), {})
testcases.append(test_class)
suite = unittest.TestSuite()
while testcases:
suite.addTest(unittest.makeSuite(testcases.pop()))
return suite
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
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