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#!/usr/bin/env python
# -*- coding: utf-8-with-signature-unix; fill-column: 77 -*-
# -*- indent-tabs-mode: nil -*-
# This file is part of pyutil; see README.rst for licensing terms.
"""\
Test time_format.py
"""
import os, time, unittest
from pyutil import time_format, increasing_timer
class TimeUtilTestCase(unittest.TestCase):
def setUp(self):
pass
def tearDown(self):
pass
def test_iso8601_utc_time(self, timer=increasing_timer.timer):
ts1 = time_format.iso_utc(timer.time() - 20)
ts2 = time_format.iso_utc()
assert ts1 < ts2, "failed: %s < %s" % (ts1, ts2)
ts3 = time_format.iso_utc(timer.time() + 20)
assert ts2 < ts3, "failed: %s < %s" % (ts2, ts3)
def test_iso_utc_time_to_localseconds(self, timer=increasing_timer.timer):
# test three times of the year so that a DST problem would hopefully be triggered
t1 = int(timer.time() - 365*3600/3)
iso_utc_t1 = time_format.iso_utc(t1)
t1_2 = time_format.iso_utc_time_to_seconds(iso_utc_t1)
assert t1 == t1_2, (t1, t1_2)
t1 = int(timer.time() - (365*3600*2/3))
iso_utc_t1 = time_format.iso_utc(t1)
t1_2 = time_format.iso_utc_time_to_seconds(iso_utc_t1)
self.assertEqual(t1, t1_2)
t1 = int(timer.time())
iso_utc_t1 = time_format.iso_utc(t1)
t1_2 = time_format.iso_utc_time_to_seconds(iso_utc_t1)
self.assertEqual(t1, t1_2)
def test_epoch(self):
return self._help_test_epoch()
def test_epoch_in_London(self):
# Europe/London is a particularly troublesome timezone. Nowadays, its
# offset from GMT is 0. But in 1970, its offset from GMT was 1.
# (Apparently in 1970 Britain had redefined standard time to be GMT+1
# and stayed in standard time all year round, whereas today
# Europe/London standard time is GMT and Europe/London Daylight
# Savings Time is GMT+1.) The current implementation of
# time_format.iso_utc_time_to_seconds() breaks if the timezone is
# Europe/London. (As soon as this unit test is done then I'll change
# that implementation to something that works even in this case...)
origtz = os.environ.get('TZ')
os.environ['TZ'] = "Europe/London"
if hasattr(time, 'tzset'):
time.tzset()
try:
return self._help_test_epoch()
finally:
if origtz is None:
del os.environ['TZ']
else:
os.environ['TZ'] = origtz
if hasattr(time, 'tzset'):
time.tzset()
def _help_test_epoch(self):
origtzname = time.tzname
s = time_format.iso_utc_time_to_seconds("1970-01-01T00:00:01Z")
self.assertEqual(s, 1.0)
s = time_format.iso_utc_time_to_seconds("1970-01-01_00:00:01Z")
self.assertEqual(s, 1.0)
s = time_format.iso_utc_time_to_seconds("1970-01-01 00:00:01Z")
self.assertEqual(s, 1.0)
self.assertEqual(time_format.iso_utc(1.0), "1970-01-01 00:00:01Z")
self.assertEqual(time_format.iso_utc(1.0, sep="_"),
"1970-01-01_00:00:01Z")
now = time.time()
isostr = time_format.iso_utc(now)
timestamp = time_format.iso_utc_time_to_seconds(isostr)
self.assertEqual(int(timestamp), int(now))
def my_time():
return 1.0
self.assertEqual(time_format.iso_utc(t=my_time),
"1970-01-01 00:00:01Z")
self.assertRaises(ValueError,
time_format.iso_utc_time_to_seconds,
"invalid timestring")
s = time_format.iso_utc_time_to_seconds("1970-01-01 00:00:01.500Z")
self.assertEqual(s, 1.5)
# Look for daylight-savings-related errors.
thatmomentinmarch = time_format.iso_utc_time_to_seconds("2009-03-20 21:49:02.226536Z")
self.assertEqual(thatmomentinmarch, 1237585742.226536)
self.assertEqual(origtzname, time.tzname)
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