cpython/Lib/test/test_time.py at main · python/cpython

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from test import support

from test.support import warnings_helper

import decimal

import enum

import fractions

import math

import platform

import sys

import sysconfig

import time

import threading

import unittest

try:

import _testcapi

except ImportError:

_testcapi = None

try:

import _testinternalcapi

except ImportError:

_testinternalcapi = None

from test.support import skip_if_buggy_ucrt_strfptime, SuppressCrashReport

# Max year is only limited by the size of C int.

SIZEOF_INT = sysconfig.get_config_var('SIZEOF_INT') or 4

TIME_MAXYEAR = (1 << 8 * SIZEOF_INT - 1) - 1

TIME_MINYEAR = -TIME_MAXYEAR - 1 + 1900

SEC_TO_US = 10 ** 6

US_TO_NS = 10 ** 3

MS_TO_NS = 10 ** 6

SEC_TO_NS = 10 ** 9

NS_TO_SEC = 10 ** 9

class _PyTime(enum.IntEnum):

# Round towards minus infinity (-inf)

ROUND_FLOOR = 0

# Round towards infinity (+inf)

ROUND_CEILING = 1

# Round to nearest with ties going to nearest even integer

ROUND_HALF_EVEN = 2

# Round away from zero

ROUND_UP = 3

# _PyTime_t is int64_t

PyTime_MIN = -2 ** 63

PyTime_MAX = 2 ** 63 - 1

# Rounding modes supported by PyTime

ROUNDING_MODES = (

# (PyTime rounding method, decimal rounding method)

(_PyTime.ROUND_FLOOR, decimal.ROUND_FLOOR),

(_PyTime.ROUND_CEILING, decimal.ROUND_CEILING),

(_PyTime.ROUND_HALF_EVEN, decimal.ROUND_HALF_EVEN),

(_PyTime.ROUND_UP, decimal.ROUND_UP),

)

class TimeTestCase(unittest.TestCase):

def setUp(self):

self.t = time.time()

def test_data_attributes(self):

time.altzone

time.daylight

time.timezone

time.tzname

def test_time(self):

time.time()

info = time.get_clock_info('time')

self.assertFalse(info.monotonic)

self.assertTrue(info.adjustable)

def test_time_ns_type(self):

def check_ns(sec, ns):

self.assertIsInstance(ns, int)

sec_ns = int(sec * 1e9)

# tolerate a difference of 50 ms

self.assertLess((sec_ns - ns), 50 ** 6, (sec, ns))

check_ns(time.time(),

time.time_ns())

check_ns(time.monotonic(),

time.monotonic_ns())

check_ns(time.perf_counter(),

time.perf_counter_ns())

check_ns(time.process_time(),

time.process_time_ns())

if hasattr(time, 'thread_time'):

check_ns(time.thread_time(),

time.thread_time_ns())

if hasattr(time, 'clock_gettime'):

check_ns(time.clock_gettime(time.CLOCK_REALTIME),

time.clock_gettime_ns(time.CLOCK_REALTIME))

@unittest.skipUnless(hasattr(time, 'clock_gettime'),

'need time.clock_gettime()')

def test_clock_realtime(self):

t = time.clock_gettime(time.CLOCK_REALTIME)

self.assertIsInstance(t, float)

@unittest.skipUnless(hasattr(time, 'clock_gettime'),

'need time.clock_gettime()')

@unittest.skipUnless(hasattr(time, 'CLOCK_MONOTONIC'),

'need time.CLOCK_MONOTONIC')

def test_clock_monotonic(self):

a = time.clock_gettime(time.CLOCK_MONOTONIC)

b = time.clock_gettime(time.CLOCK_MONOTONIC)

self.assertLessEqual(a, b)

@unittest.skipUnless(hasattr(time, 'pthread_getcpuclockid'),

'need time.pthread_getcpuclockid()')

@unittest.skipUnless(hasattr(time, 'clock_gettime'),

'need time.clock_gettime()')

@unittest.skipIf(support.is_emscripten, "Fails to find clock")

def test_pthread_getcpuclockid(self):

clk_id = time.pthread_getcpuclockid(threading.get_ident())

self.assertTrue(type(clk_id) is int)

# when in 32-bit mode AIX only returns the predefined constant

if platform.system() == "AIX" and (sys.maxsize.bit_length() <= 32):

self.assertEqual(clk_id, time.CLOCK_THREAD_CPUTIME_ID)

# Solaris returns CLOCK_THREAD_CPUTIME_ID when current thread is given

elif sys.platform.startswith("sunos"):

self.assertEqual(clk_id, time.CLOCK_THREAD_CPUTIME_ID)

else:

self.assertNotEqual(clk_id, time.CLOCK_THREAD_CPUTIME_ID)

t1 = time.clock_gettime(clk_id)

t2 = time.clock_gettime(clk_id)

self.assertLessEqual(t1, t2)

@unittest.skipUnless(hasattr(time, 'clock_getres'),

'need time.clock_getres()')

def test_clock_getres(self):

res = time.clock_getres(time.CLOCK_REALTIME)

self.assertGreater(res, 0.0)

self.assertLessEqual(res, 1.0)

@unittest.skipUnless(hasattr(time, 'clock_settime'),

'need time.clock_settime()')

def test_clock_settime(self):

t = time.clock_gettime(time.CLOCK_REALTIME)

try:

time.clock_settime(time.CLOCK_REALTIME, t)

except PermissionError:

pass

if hasattr(time, 'CLOCK_MONOTONIC'):

self.assertRaises(OSError,

time.clock_settime, time.CLOCK_MONOTONIC, 0)

def test_conversions(self):

self.assertEqual(time.ctime(self.t),

time.asctime(time.localtime(self.t)))

self.assertEqual(int(time.mktime(time.localtime(self.t))),

int(self.t))

def test_sleep_exceptions(self):

self.assertRaises(TypeError, time.sleep, [])

self.assertRaises(TypeError, time.sleep, "a")

self.assertRaises(TypeError, time.sleep, complex(0, 0))

self.assertRaises(ValueError, time.sleep, -2)

self.assertRaises(ValueError, time.sleep, -1)

self.assertRaises(ValueError, time.sleep, -0.1)

# Improved exception #81267

with self.assertRaises(TypeError) as errmsg:

time.sleep([])

self.assertIn("real number", str(errmsg.exception))

def test_sleep(self):

for value in [-0.0, 0, 0.0, 1e-100, 1e-9, 1e-6, 1, 1.2,

decimal.Decimal('0.02'),

fractions.Fraction(1, 50)]:

with self.subTest(value=value):

time.sleep(value)

def test_epoch(self):

# bpo-43869: Make sure that Python use the same Epoch on all platforms:

# January 1, 1970, 00:00:00 (UTC).

epoch = time.gmtime(0)

# Only test the date and time, ignore other gmtime() members

self.assertEqual(tuple(epoch)[:6], (1970, 1, 1, 0, 0, 0), epoch)

def test_gmtime(self):

# expected format:

# (tm_year, tm_mon, tm_mday,

# tm_hour, tm_min, tm_sec,

# tm_wday, tm_yday)

tests = [

(-13262400, (1969, 7, 31, 12, 0, 0, 3, 212)),

(-6177600, (1969, 10, 21, 12, 0, 0, 1, 294)),

# leap years (pre epoch)

(-2077660800, (1904, 3, 1, 0, 0, 0, 1, 61)),

(-2077833600, (1904, 2, 28, 0, 0, 0, 6, 59)),

]

try:

from _testinternalcapi import SIZEOF_TIME_T

except ImportError:

pass

else:

if SIZEOF_TIME_T >= 8:

tests.extend((

# non-leap years (pre epoch)

(-2203891200, (1900, 3, 1, 0, 0, 0, 3, 60)),

(-2203977600, (1900, 2, 28, 0, 0, 0, 2, 59)),

(-5359564800, (1800, 3, 1, 0, 0, 0, 5, 60)),

(-5359651200, (1800, 2, 28, 0, 0, 0, 4, 59)),

))

for t, expected in tests:

with self.subTest(t=t, expected=expected):

res = time.gmtime(t)

self.assertEqual(tuple(res)[:8], expected, res)

def test_strftime(self):

tt = time.gmtime(self.t)

for directive in ('a', 'A', 'b', 'B', 'c', 'd', 'H', 'I',

'j', 'm', 'M', 'p', 'S',

'U', 'w', 'W', 'x', 'X', 'y', 'Y', 'Z', '%'):

format = ' %' + directive

try:

time.strftime(format, tt)

except ValueError:

self.fail('conversion specifier: %r failed.' % format)

self.assertRaises(TypeError, time.strftime, b'%S', tt)

def test_strftime_invalid_format(self):

tt = time.gmtime(self.t)

with SuppressCrashReport():

for i in range(1, 128):

format = ' %' + chr(i)

with self.subTest(format=format):

try:

time.strftime(format, tt)

except ValueError as exc:

self.assertEqual(str(exc), 'Invalid format string')

def test_strftime_special(self):

tt = time.gmtime(self.t)

s1 = time.strftime('%c', tt)

s2 = time.strftime('%B', tt)

# gh-52551, gh-78662: Unicode strings should pass through strftime,

# independently from locale.

self.assertEqual(time.strftime('\U0001f40d', tt), '\U0001f40d')

self.assertEqual(time.strftime('\U0001f4bb%c\U0001f40d%B', tt), f'\U0001f4bb{s1}\U0001f40d{s2}')

self.assertEqual(time.strftime('%c\U0001f4bb%B\U0001f40d', tt), f'{s1}\U0001f4bb{s2}\U0001f40d')

# Lone surrogates should pass through.

self.assertEqual(time.strftime('\ud83d', tt), '\ud83d')

self.assertEqual(time.strftime('\udc0d', tt), '\udc0d')

self.assertEqual(time.strftime('\ud83d%c\udc0d%B', tt), f'\ud83d{s1}\udc0d{s2}')

self.assertEqual(time.strftime('%c\ud83d%B\udc0d', tt), f'{s1}\ud83d{s2}\udc0d')

self.assertEqual(time.strftime('%c\udc0d%B\ud83d', tt), f'{s1}\udc0d{s2}\ud83d')

# Surrogate pairs should not recombine.

self.assertEqual(time.strftime('\ud83d\udc0d', tt), '\ud83d\udc0d')

self.assertEqual(time.strftime('%c\ud83d\udc0d%B', tt), f'{s1}\ud83d\udc0d{s2}')

# Surrogate-escaped bytes should not recombine.

self.assertEqual(time.strftime('\udcf0\udc9f\udc90\udc8d', tt), '\udcf0\udc9f\udc90\udc8d')

self.assertEqual(time.strftime('%c\udcf0\udc9f\udc90\udc8d%B', tt), f'{s1}\udcf0\udc9f\udc90\udc8d{s2}')

# gh-124531: The null character should not terminate the format string.

self.assertEqual(time.strftime('\0', tt), '\0')

self.assertEqual(time.strftime('\0'*1000, tt), '\0'*1000)

self.assertEqual(time.strftime('\0%c\0%B', tt), f'\0{s1}\0{s2}')

self.assertEqual(time.strftime('%c\0%B\0', tt), f'{s1}\0{s2}\0')

def _bounds_checking(self, func):

# Make sure that strftime() checks the bounds of the various parts

# of the time tuple (0 is valid for *all* values).

# The year field is tested by other test cases above

# Check month [1, 12] + zero support

func((1900, 0, 1, 0, 0, 0, 0, 1, -1))

func((1900, 12, 1, 0, 0, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, -1, 1, 0, 0, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 13, 1, 0, 0, 0, 0, 1, -1))

# Check day of month [1, 31] + zero support

func((1900, 1, 0, 0, 0, 0, 0, 1, -1))

func((1900, 1, 31, 0, 0, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, -1, 0, 0, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 32, 0, 0, 0, 0, 1, -1))

# Check hour [0, 23]

func((1900, 1, 1, 23, 0, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, -1, 0, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, 24, 0, 0, 0, 1, -1))

# Check minute [0, 59]

func((1900, 1, 1, 0, 59, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, -1, 0, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, 60, 0, 0, 1, -1))

# Check second [0, 61]

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, 0, -1, 0, 1, -1))

# C99 only requires allowing for one leap second, but Python's docs say

# allow two leap seconds (0..61)

func((1900, 1, 1, 0, 0, 60, 0, 1, -1))

func((1900, 1, 1, 0, 0, 61, 0, 1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, 0, 62, 0, 1, -1))

# No check for upper-bound day of week;

# value forced into range by a ``% 7`` calculation.

# Start check at -2 since gettmarg() increments value before taking

# modulo.

self.assertEqual(func((1900, 1, 1, 0, 0, 0, -1, 1, -1)),

func((1900, 1, 1, 0, 0, 0, +6, 1, -1)))

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, 0, 0, -2, 1, -1))

# Check day of the year [1, 366] + zero support

func((1900, 1, 1, 0, 0, 0, 0, 0, -1))

func((1900, 1, 1, 0, 0, 0, 0, 366, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, 0, 0, 0, -1, -1))

self.assertRaises(ValueError, func,

(1900, 1, 1, 0, 0, 0, 0, 367, -1))

def test_strftime_bounding_check(self):

self._bounds_checking(lambda tup: time.strftime('', tup))

def test_strftime_format_check(self):

# Test that strftime does not crash on invalid format strings

# that may trigger a buffer overread. When not triggered,

# strftime may succeed or raise ValueError depending on

# the platform.

for x in [ '', 'A', '%A', '%AA' ]:

for y in range(0x0, 0x10):

for z in [ '%', 'A%', 'AA%', '%A%', 'A%A%', '%#' ]:

try:

time.strftime(x * y + z)

except ValueError:

pass

def test_default_values_for_zero(self):

# Make sure that using all zeros uses the proper default

# values. No test for daylight savings since strftime() does

# not change output based on its value and no test for year

# because systems vary in their support for year 0.

expected = "2000 01 01 00 00 00 1 001"

with warnings_helper.check_warnings():

result = time.strftime("%Y %m %d %H %M %S %w %j", (2000,)+(0,)*8)

self.assertEqual(expected, result)

@skip_if_buggy_ucrt_strfptime

def test_strptime(self):

# Should be able to go round-trip from strftime to strptime without

# raising an exception.

tt = time.gmtime(self.t)

for directive in ('a', 'A', 'b', 'B', 'c', 'd', 'D', 'e', 'F', 'H', 'I',

'j', 'm', 'M', 'n', 'p', 'S', 't', 'T',

'U', 'w', 'W', 'x', 'X', 'y', 'Y', 'Z', '%'):

format = '%' + directive

if directive in ('d', 'e'):

format += ',%Y' # Avoid GH-70647.

strf_output = time.strftime(format, tt)

try:

time.strptime(strf_output, format)

except ValueError:

self.fail("conversion specifier %r failed with '%s' input." %

(format, strf_output))

def test_strptime_whitespace(self):

whitespace = (' ', '\t\n\r\v\f', '\x1c', '\xa0', '\u2003', '\u202f')

for input_space in whitespace:

for format_space in whitespace:

with self.subTest(input_space=input_space,

format_space=format_space):

text = input_space.join(('2024-02-29', '12:34:56'))

fmt = format_space.join(('%Y-%m-%d', '%H:%M:%S'))

self.assertEqual(time.strptime(text, fmt),

(2024, 2, 29, 12, 34, 56, 3, 60, -1))

def test_strptime_whitespace_before_adjacent_fields(self):

for separator in ('\x1c', '\x1d', '\x1e', '\x1f'):

with self.subTest(separator=separator):

text = f'2024{separator} 112 34{separator} 123'

fmt = f'%Y{separator}%d%m %M{separator}%H%S'

self.assertEqual(time.strptime(text, fmt),

(2024, 2, 11, 12, 34, 3, 6, 42, -1))

def test_strptime_numeric_calendar(self):

cases = (

('0001-01-01', 1, 1, 1, 0, 1),

('1900-03-01', 1900, 3, 1, 3, 60),

('2000-02-29', 2000, 2, 29, 1, 60),

('2000-03-01', 2000, 3, 1, 2, 61),

('2024-12-31', 2024, 12, 31, 1, 366),

('2100-03-01', 2100, 3, 1, 0, 60),

('9999-12-31', 9999, 12, 31, 4, 365),

)

for text, year, month, day, weekday, yday in cases:

with self.subTest(text=text):

result = time.strptime(text, '%Y-%m-%d')

self.assertIs(type(result), time.struct_time)

self.assertEqual(result,

(year, month, day, 0, 0, 0, weekday, yday, -1))

self.assertIsNone(result.tm_zone)

self.assertIsNone(result.tm_gmtoff)

def test_strptime_numeric_offset(self):

for text, offset in (('', None), ('Z', 0), ('+0000', 0),

('-00:00', 0), ('+0530', 19800),

('-03:30', -12600), ('+2359', 86340),

('+01:02:03.456', 3723)):

with self.subTest(text=text):

result = time.strptime('12:34:56.123' + text, '%H:%M:%S.%f%z')

self.assertEqual(result, (1900, 1, 1, 12, 34, 56, 0, 1, -1))

self.assertIsNone(result.tm_zone)

self.assertEqual(result.tm_gmtoff, offset)

@support.run_with_locale('LC_TIME', 'C')

def test_strptime_default_format(self):

self.assertEqual(time.strptime('Thu Feb 29 12:34:56 2024'),

(2024, 2, 29, 12, 34, 56, 3, 60, -1))

for args in ((), ('2024', '%Y', 'extra'), (None, '%Y')):

with self.subTest(args=args):

with self.assertRaises(TypeError):

time.strptime(*args)

def test_strptime_bytes(self):

# Make sure only strings are accepted as arguments to strptime.

self.assertRaises(TypeError, time.strptime, b'2009', "%Y")

self.assertRaises(TypeError, time.strptime, '2009', b'%Y')

def test_strptime_exception_context(self):

# check that this doesn't chain exceptions needlessly (see #17572)

with self.assertRaises(ValueError) as e:

time.strptime('', '%!')

self.assertTrue(e.exception.__suppress_context__)

# additional check for stray % branch

with self.assertRaises(ValueError) as e:

time.strptime('%', '%')

self.assertTrue(e.exception.__suppress_context__)

def test_strptime_leap_year(self):

# GH-70647: %d errors if parsing a format with a day and no year.

with self.assertRaises(ValueError):

time.strptime('02-07 18:28', '%m-%d %H:%M')

# %e without a year is deprecated, scheduled for removal in 3.17.

with self.assertWarnsRegex(DeprecationWarning,

r'.*day of month without a year.*'):

time.strptime('02-07 18:28', '%m-%e %H:%M')

def test_asctime(self):

time.asctime(time.gmtime(self.t))

# Max year is only limited by the size of C int.

for bigyear in TIME_MAXYEAR, TIME_MINYEAR:

asc = time.asctime((bigyear, 6, 1) + (0,) * 6)

self.assertEqual(asc[-len(str(bigyear)):], str(bigyear))

self.assertRaises(OverflowError, time.asctime,

(TIME_MAXYEAR + 1,) + (0,) * 8)

self.assertRaises(OverflowError, time.asctime,

(TIME_MINYEAR - 1,) + (0,) * 8)

self.assertRaises(TypeError, time.asctime, 0)

self.assertRaises(TypeError, time.asctime, ())

self.assertRaises(TypeError, time.asctime, (0,) * 10)

def test_asctime_bounding_check(self):

self._bounds_checking(time.asctime)

def test_ctime(self):

t = time.mktime((1973, 9, 16, 1, 3, 52, 0, 0, -1))

self.assertEqual(time.ctime(t), 'Sun Sep 16 01:03:52 1973')

t = time.mktime((2000, 1, 1, 0, 0, 0, 0, 0, -1))

self.assertEqual(time.ctime(t), 'Sat Jan 1 00:00:00 2000')

for year in [-100, 100, 1000, 2000, 2050, 10000]:

try:

testval = time.mktime((year, 1, 10) + (0,)*6)

except (ValueError, OverflowError):

# If mktime fails, ctime will fail too. This may happen

# on some platforms.

pass

else:

self.assertEqual(time.ctime(testval)[20:], str(year))

@unittest.skipUnless(hasattr(time, "tzset"),

"time module has no attribute tzset")

def test_tzset(self):

from os import environ

# Epoch time of midnight Dec 25th 2002. Never DST in northern

# hemisphere.

xmas2002 = 1040774400.0

# These formats are correct for 2002, and possibly future years

# This format is the 'standard' as documented at:

# http://www.opengroup.org/onlinepubs/007904975/basedefs/xbd_chap08.html

# They are also documented in the tzset(3) man page on most Unix

# systems.

eastern = 'EST+05EDT,M4.1.0,M10.5.0'

victoria = 'AEST-10AEDT-11,M10.5.0,M3.5.0'

utc='UTC+0'

org_TZ = environ.get('TZ',None)

try:

# Make sure we can switch to UTC time and results are correct

# Note that unknown timezones default to UTC.

# Note that altzone is undefined in UTC, as there is no DST

environ['TZ'] = eastern

time.tzset()

environ['TZ'] = utc

time.tzset()

self.assertEqual(

time.gmtime(xmas2002), time.localtime(xmas2002)

)

self.assertEqual(time.daylight, 0)

self.assertEqual(time.timezone, 0)

self.assertEqual(time.localtime(xmas2002).tm_isdst, 0)

# Make sure we can switch to US/Eastern

environ['TZ'] = eastern

time.tzset()

self.assertNotEqual(time.gmtime(xmas2002), time.localtime(xmas2002))

self.assertEqual(time.tzname, ('EST', 'EDT'))

self.assertEqual(len(time.tzname), 2)

self.assertEqual(time.daylight, 1)

self.assertEqual(time.timezone, 18000)

self.assertEqual(time.altzone, 14400)

self.assertEqual(time.localtime(xmas2002).tm_isdst, 0)

self.assertEqual(len(time.tzname), 2)

# Now go to the southern hemisphere.

environ['TZ'] = victoria

time.tzset()

self.assertNotEqual(time.gmtime(xmas2002), time.localtime(xmas2002))

# Issue #11886: Australian Eastern Standard Time (UTC+10) is called

# "EST" (as Eastern Standard Time, UTC-5) instead of "AEST"

# (non-DST timezone), and "EDT" instead of "AEDT" (DST timezone),

# on some operating systems (e.g. FreeBSD), which is wrong. See for

# example this bug:

# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=93810

self.assertIn(time.tzname[0], ('AEST' 'EST'), time.tzname[0])

self.assertTrue(time.tzname[1] in ('AEDT', 'EDT'), str(time.tzname[1]))

self.assertEqual(len(time.tzname), 2)

self.assertEqual(time.daylight, 1)

self.assertEqual(time.timezone, -36000)

self.assertEqual(time.altzone, -39600)

self.assertEqual(time.localtime(xmas2002).tm_isdst, 1)

finally:

# Repair TZ environment variable in case any other tests

# rely on it.

if org_TZ is not None:

environ['TZ'] = org_TZ

elif 'TZ' in environ:

del environ['TZ']

time.tzset()

def test_insane_timestamps(self):

# It's possible that some platform maps time_t to double,

# and that this test will fail there. This test should

# exempt such platforms (provided they return reasonable

# results!).

for func in time.ctime, time.gmtime, time.localtime:

for unreasonable in -1e200, 1e200:

self.assertRaises(OverflowError, func, unreasonable)

def test_ctime_without_arg(self):

# Not sure how to check the values, since the clock could tick

# at any time. Make sure these are at least accepted and

# don't raise errors.

time.ctime()

time.ctime(None)

def test_gmtime_without_arg(self):

gt0 = time.gmtime()

gt1 = time.gmtime(None)

t0 = time.mktime(gt0)

t1 = time.mktime(gt1)

self.assertAlmostEqual(t1, t0, delta=0.2)

def test_localtime_without_arg(self):

lt0 = time.localtime()

lt1 = time.localtime(None)

t0 = time.mktime(lt0)

t1 = time.mktime(lt1)

self.assertAlmostEqual(t1, t0, delta=0.2)

def test_mktime(self):

# Issue #1726687

for t in (-2, -1, 0, 1):

t_struct = time.localtime(t)

try:

t1 = time.mktime(t_struct)

except (OverflowError, OSError):

pass

else:

self.assertEqual(t1, t)

# Issue #13309: passing extreme values to mktime() or localtime()

# borks the glibc's internal timezone data.

@unittest.skipUnless(platform.libc_ver()[0] != 'glibc',

"disabled because of a bug in glibc. Issue #13309")

def test_mktime_error(self):

# It may not be possible to reliably make mktime return an error

# on all platforms. This will make sure that no other exception

# than OverflowError is raised for an extreme value.

tt = time.gmtime(self.t)

tzname = time.strftime('%Z', tt)

self.assertNotEqual(tzname, 'LMT')

try:

time.mktime((-1, 1, 1, 0, 0, 0, -1, -1, -1))

except OverflowError:

pass

self.assertEqual(time.strftime('%Z', tt), tzname)

def test_monotonic(self):

# monotonic() should not go backward

times = [time.monotonic() for n in range(100)]

t1 = times[0]

for t2 in times[1:]:

self.assertGreaterEqual(t2, t1, "times=%s" % times)

t1 = t2

# monotonic() includes time elapsed during a sleep

t1 = time.monotonic()

time.sleep(0.5)

t2 = time.monotonic()

dt = t2 - t1

self.assertGreater(t2, t1)

# bpo-20101: tolerate a difference of 50 ms because of bad timer

# resolution on Windows

self.assertTrue(0.450 <= dt)

# monotonic() is a monotonic but non adjustable clock

info = time.get_clock_info('monotonic')

self.assertTrue(info.monotonic)

self.assertFalse(info.adjustable)

def test_perf_counter(self):

time.perf_counter()

@unittest.skipIf(

support.is_wasi, "process_time not available on WASI"

)

@unittest.skipIf(

support.is_emscripten, "process_time present but doesn't exclude sleep"

)

def test_process_time(self):

# process_time() should not include time spend during a sleep

start = time.process_time()

time.sleep(0.100)

stop = time.process_time()

# use 20 ms because process_time() has usually a resolution of 15 ms

# on Windows

self.assertLess(stop - start, 0.020)

info = time.get_clock_info('process_time')

self.assertTrue(info.monotonic)

self.assertFalse(info.adjustable)

def test_thread_time(self):

if not hasattr(time, 'thread_time'):

if sys.platform.startswith(('linux', 'android', 'win')):

self.fail("time.thread_time() should be available on %r"

% (sys.platform,))

else:

self.skipTest("need time.thread_time")

# thread_time() should not include time spend during a sleep

start = time.thread_time()

time.sleep(0.200)

stop = time.thread_time()

# gh-143528: use 100 ms to support slow CI

self.assertLess(stop - start, 0.100)

info = time.get_clock_info('thread_time')

self.assertTrue(info.monotonic)

self.assertFalse(info.adjustable)

@unittest.skipUnless(hasattr(time, 'clock_settime'),

'need time.clock_settime')

def test_monotonic_settime(self):

t1 = time.monotonic()

realtime = time.clock_gettime(time.CLOCK_REALTIME)

# jump backward with an offset of 1 hour

try:

time.clock_settime(time.CLOCK_REALTIME, realtime - 3600)

except PermissionError as err:

self.skipTest(err)

t2 = time.monotonic()

time.clock_settime(time.CLOCK_REALTIME, realtime)

# monotonic must not be affected by system clock updates

self.assertGreaterEqual(t2, t1)

def test_localtime_failure(self):

# Issue #13847: check for localtime() failure

invalid_time_t = None

for time_t in (-1, 2**30, 2**33, 2**60):

try:

time.localtime(time_t)

except OverflowError:

self.skipTest("need 64-bit time_t")

except OSError:

invalid_time_t = time_t

break

if invalid_time_t is None:

self.skipTest("unable to find an invalid time_t value")

self.assertRaises(OSError, time.localtime, invalid_time_t)

self.assertRaises(OSError, time.ctime, invalid_time_t)

# Issue #26669: check for localtime() failure

self.assertRaises(ValueError, time.localtime, float("nan"))

self.assertRaises(ValueError, time.ctime, float("nan"))

def test_get_clock_info(self):

clocks = [

'monotonic',

'perf_counter',

'process_time',

'time',

]

if hasattr(time, 'thread_time'):

clocks.append('thread_time')

for name in clocks:

with self.subTest(name=name):

info = time.get_clock_info(name)

self.assertIsInstance(info.implementation, str)

self.assertNotEqual(info.implementation, '')

self.assertIsInstance(info.monotonic, bool)

self.assertIsInstance(info.resolution, float)

# 0.0 < resolution <= 1.0

self.assertGreater(info.resolution, 0.0)

self.assertLessEqual(info.resolution, 1.0)

self.assertIsInstance(info.adjustable, bool)

self.assertRaises(ValueError, time.get_clock_info, 'xxx')

class TestLocale(unittest.TestCase):

@support.run_with_locale('LC_ALL', 'fr_FR', '')

def test_bug_3061(self):

# This should not cause an exception

time.strftime("%B", (2009,2,1,0,0,0,0,0,0))

class _TestAsctimeYear:

_format = '%d'

def yearstr(self, y):

return time.asctime((y,) + (0,) * 8).split()[-1]

def test_large_year(self):

# Check that it doesn't crash for year > 9999

self.assertEqual(self.yearstr(12345), '12345')

self.assertEqual(self.yearstr(123456789), '123456789')

class _TestStrftimeYear:

# Issue 13305: For years < 1000, the value is not always

# padded to 4 digits across platforms. The C standard

# assumes year >= 1900, so it does not specify the number

# of digits.

if time.strftime('%Y', (1,) + (0,) * 8) == '0001':

_format = '%04d'

else:

_format = '%d'

def yearstr(self, y):

return time.strftime('%Y', (y,) + (0,) * 8)

@unittest.skipUnless(

support.has_strftime_extensions, "requires strftime extension"

)

def test_4dyear(self):

# Check that we can return the zero padded value.

if self._format == '%04d':

self.test_year('%04d')

else:

def year4d(y):

return time.strftime('%4Y', (y,) + (0,) * 8)

self.test_year('%04d', func=year4d)

def skip_if_not_supported(y):

msg = f"strftime() does not support year {y} on this platform"

try:

time.strftime('%Y', (y,) + (0,) * 8)

except ValueError:

cond = False

else:

cond = True

return unittest.skipUnless(cond, msg)

@skip_if_not_supported(10000)

def test_large_year(self):

return super().test_large_year()

@skip_if_not_supported(0)

def test_negative(self):

return super().test_negative()

del skip_if_not_supported

class _Test4dYear:

_format = '%d'

def test_year(self, fmt=None, func=None):

fmt = fmt or self._format

func = func or self.yearstr

self.assertEqual(func(1), fmt % 1)

self.assertEqual(func(68), fmt % 68)

self.assertEqual(func(69), fmt % 69)

self.assertEqual(func(99), fmt % 99)

self.assertEqual(func(999), fmt % 999)

self.assertEqual(func(9999), fmt % 9999)

def test_large_year(self):

self.assertEqual(self.yearstr(12345).lstrip('+'), '12345')

self.assertEqual(self.yearstr(123456789).lstrip('+'), '123456789')

self.assertEqual(self.yearstr(TIME_MAXYEAR).lstrip('+'), str(TIME_MAXYEAR))

self.assertRaises(OverflowError, self.yearstr, TIME_MAXYEAR + 1)

def test_negative(self):

self.assertEqual(self.yearstr(-1), self._format % -1)

self.assertEqual(self.yearstr(-1234), '-1234')

self.assertEqual(self.yearstr(-123456), '-123456')

self.assertEqual(self.yearstr(-123456789), str(-123456789))

self.assertEqual(self.yearstr(-1234567890), str(-1234567890))

self.assertEqual(self.yearstr(TIME_MINYEAR), str(TIME_MINYEAR))

# Modules/timemodule.c checks for underflow

self.assertRaises(OverflowError, self.yearstr, TIME_MINYEAR - 1)

with self.assertRaises(OverflowError):

self.yearstr(-TIME_MAXYEAR - 1)

class TestAsctime4dyear(_TestAsctimeYear, _Test4dYear, unittest.TestCase):

pass

class TestStrftime4dyear(_TestStrftimeYear, _Test4dYear, unittest.TestCase):

pass

class TestPytime(unittest.TestCase):

@skip_if_buggy_ucrt_strfptime

def test_localtime_timezone(self):

# Get the localtime and examine it for the offset and zone.

lt = time.localtime()

self.assertHasAttr(lt, "tm_gmtoff")

self.assertHasAttr(lt, "tm_zone")

# See if the offset and zone are similar to the module

# attributes.

if lt.tm_gmtoff is None:

self.assertNotHasAttr(time, "timezone")

else:

self.assertEqual(lt.tm_gmtoff, -[time.timezone, time.altzone][lt.tm_isdst])

if lt.tm_zone is None:

self.assertNotHasAttr(time, "tzname")

else:

self.assertEqual(lt.tm_zone, time.tzname[lt.tm_isdst])

# Try and make UNIX times from the localtime and a 9-tuple

# created from the localtime. Test to see that the times are

# the same.

t = time.mktime(lt); t9 = time.mktime(lt[:9])

self.assertEqual(t, t9)

# Make localtimes from the UNIX times and compare them to

# the original localtime, thus making a round trip.

new_lt = time.localtime(t); new_lt9 = time.localtime(t9)

self.assertEqual(new_lt, lt)

self.assertEqual(new_lt.tm_gmtoff, lt.tm_gmtoff)

self.assertEqual(new_lt.tm_zone, lt.tm_zone)

self.assertEqual(new_lt9, lt)

self.assertEqual(new_lt.tm_gmtoff, lt.tm_gmtoff)

self.assertEqual(new_lt9.tm_zone, lt.tm_zone)

def test_strptime_timezone(self):

t = time.strptime("UTC", "%Z")

self.assertEqual(t.tm_zone, 'UTC')

t = time.strptime("+0500", "%z")

self.assertEqual(t.tm_gmtoff, 5 * 3600)

def test_short_times(self):

import pickle

# Load a short time structure using pickle.

st = b"ctime\nstruct_time\np0\n((I2007\nI8\nI11\nI1\nI24\nI49\nI5\nI223\nI1\ntp1\n(dp2\ntp3\nRp4\n."

lt = pickle.loads(st)

self.assertIs(lt.tm_gmtoff, None)

self.assertIs(lt.tm_zone, None)

@unittest.skipIf(_testcapi is None, 'need the _testinternalcapi module')

@unittest.skipIf(_testinternalcapi is None, 'need the _testinternalcapi module')

class CPyTimeTestCase:

"""

Base class to test the C _PyTime_t API.

"""

OVERFLOW_SECONDS = None

def setUp(self):

from _testinternalcapi import SIZEOF_TIME_T

bits = SIZEOF_TIME_T * 8 - 1

self.time_t_min = -2 ** bits

self.time_t_max = 2 ** bits - 1

def time_t_filter(self, seconds):

return (self.time_t_min <= seconds <= self.time_t_max)

def _rounding_values(self, use_float):

"Build timestamps used to test rounding."

units = [1, US_TO_NS, MS_TO_NS, SEC_TO_NS]

if use_float:

# picoseconds are only tested to pytime_converter accepting floats

units.append(1e-3)

values = (

# small values

1, 2, 5, 7, 123, 456, 1234,

# 10^k - 1

99,

999,

9999,

99999,

999999,

# test half even rounding near 0.5, 1.5, 2.5, 3.5, 4.5

499, 500, 501,

1499, 1500, 1501,

2500,

3500,

4500,

)

ns_timestamps = [0]

for unit in units:

for value in values:

ns = value * unit

ns_timestamps.extend((-ns, ns))

for pow2 in (0, 5, 10, 15, 22, 23, 24, 30, 33):

ns = (2 ** pow2) * SEC_TO_NS

ns_timestamps.extend((

-ns-1, -ns, -ns+1,

ns-1, ns, ns+1

))

for seconds in (_testcapi.INT_MIN, _testcapi.INT_MAX):

ns_timestamps.append(seconds * SEC_TO_NS)

if use_float:

# numbers with an exact representation in IEEE 754 (base 2)

for pow2 in (3, 7, 10, 15):

ns = 2.0 ** (-pow2)

ns_timestamps.extend((-ns, ns))

# seconds close to _PyTime_t type limit

ns = (2 ** 63 // SEC_TO_NS) * SEC_TO_NS

ns_timestamps.extend((-ns, ns))

return ns_timestamps

def _check_rounding(self, pytime_converter, expected_func,

use_float, unit_to_sec, value_filter=None):

def convert_values(ns_timestamps):

if use_float:

unit_to_ns = SEC_TO_NS / float(unit_to_sec)

values = [ns / unit_to_ns for ns in ns_timestamps]

else:

unit_to_ns = SEC_TO_NS // unit_to_sec

values = [ns // unit_to_ns for ns in ns_timestamps]

if value_filter:

values = filter(value_filter, values)

# remove duplicates and sort

return sorted(set(values))

# test rounding

ns_timestamps = self._rounding_values(use_float)

valid_values = convert_values(ns_timestamps)

for time_rnd, decimal_rnd in ROUNDING_MODES:

with decimal.localcontext() as context:

context.rounding = decimal_rnd

for value in valid_values:

debug_info = {'value': value, 'rounding': decimal_rnd}

try:

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