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Name	Size	Permission	Date
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test_codecmaps_jp.py	1.7 KB	-rw-r--r--	2026-03-26 17:22
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Rename

from test import support
from test.support import warnings_helper
import decimal
import enum
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()')
    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)

def test_sleep(self):
        for value in [-0.0, 0, 0.0, 1e-100, 1e-9, 1e-6, 1, 1.2]:
            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_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', 'H', 'I',
                          'j', 'm', 'M', 'p', 'S',
                          'U', 'w', 'W', 'x', 'X', 'y', 'Y', 'Z', '%'):
            format = '%' + directive
            if directive == 'd':
                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_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('', '%D')
        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: warns if parsing a format with a day and no year.
        with self.assertWarnsRegex(DeprecationWarning,
                                   r'.*day of month without a year.*'):
            time.strptime('02-07 18:28', '%m-%d %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)

@unittest.skipIf(
        support.is_emscripten, "musl libc issue on Emscripten, bpo-46390"
    )
    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):
            try:
                tt = time.localtime(t)
            except (OverflowError, OSError):
                pass
            else:
                self.assertEqual(time.mktime(tt), 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"
    )
    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
    @unittest.skipUnless(time._STRUCT_TM_ITEMS == 11, "needs tm_zone support")
    @unittest.skipIf(
        support.is_emscripten, "musl libc issue on Emscripten, bpo-46390"
    )
    def test_localtime_timezone(self):

# Get the localtime and examine it for the offset and zone.
        lt = time.localtime()
        self.assertTrue(hasattr(lt, "tm_gmtoff"))
        self.assertTrue(hasattr(lt, "tm_zone"))

# See if the offset and zone are similar to the module
        # attributes.
        if lt.tm_gmtoff is None:
            self.assertTrue(not hasattr(time, "timezone"))
        else:
            self.assertEqual(lt.tm_gmtoff, -[time.timezone, time.altzone][lt.tm_isdst])
        if lt.tm_zone is None:
            self.assertTrue(not hasattr(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)

@unittest.skipUnless(time._STRUCT_TM_ITEMS == 11, "needs tm_zone support")
    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)

@unittest.skipUnless(time._STRUCT_TM_ITEMS == 11, "needs tm_zone support")
    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
            9,
            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:
                        result = pytime_converter(value, time_rnd)
                        expected = expected_func(value)
                    except Exception:
                        self.fail("Error on timestamp conversion: %s" % debug_info)
                    self.assertEqual(result,
                                     expected,
                                     debug_info)

# test overflow
        ns = self.OVERFLOW_SECONDS * SEC_TO_NS
        ns_timestamps = (-ns, ns)
        overflow_values = convert_values(ns_timestamps)
        for time_rnd, _ in ROUNDING_MODES :
            for value in overflow_values:
                debug_info = {'value': value, 'rounding': time_rnd}
                with self.assertRaises(OverflowError, msg=debug_info):
                    pytime_converter(value, time_rnd)

def check_int_rounding(self, pytime_converter, expected_func,
                           unit_to_sec=1, value_filter=None):
        self._check_rounding(pytime_converter, expected_func,
                             False, unit_to_sec, value_filter)

def check_float_rounding(self, pytime_converter, expected_func,
                             unit_to_sec=1, value_filter=None):
        self._check_rounding(pytime_converter, expected_func,
                             True, unit_to_sec, value_filter)

def decimal_round(self, x):
        d = decimal.Decimal(x)
        d = d.quantize(1)
        return int(d)

class TestCPyTime(CPyTimeTestCase, unittest.TestCase):
    """
    Test the C _PyTime_t API.
    """
    # _PyTime_t is a 64-bit signed integer
    OVERFLOW_SECONDS = math.ceil((2**63 + 1) / SEC_TO_NS)

def test_FromSeconds(self):
        from _testinternalcapi import _PyTime_FromSeconds

# _PyTime_FromSeconds() expects a C int, reject values out of range
        def c_int_filter(secs):
            return (_testcapi.INT_MIN <= secs <= _testcapi.INT_MAX)

self.check_int_rounding(lambda secs, rnd: _PyTime_FromSeconds(secs),
                                lambda secs: secs * SEC_TO_NS,
                                value_filter=c_int_filter)

# test nan
        for time_rnd, _ in ROUNDING_MODES:
            with self.assertRaises(TypeError):
                _PyTime_FromSeconds(float('nan'))

def test_FromSecondsObject(self):
        from _testinternalcapi import _PyTime_FromSecondsObject

self.check_int_rounding(
            _PyTime_FromSecondsObject,
            lambda secs: secs * SEC_TO_NS)

self.check_float_rounding(
            _PyTime_FromSecondsObject,
            lambda ns: self.decimal_round(ns * SEC_TO_NS))

# test nan
        for time_rnd, _ in ROUNDING_MODES:
            with self.assertRaises(ValueError):
                _PyTime_FromSecondsObject(float('nan'), time_rnd)

def test_AsSecondsDouble(self):
        from _testcapi import PyTime_AsSecondsDouble

def float_converter(ns):
            if abs(ns) % SEC_TO_NS == 0:
                return float(ns // SEC_TO_NS)
            else:
                return float(ns) / SEC_TO_NS

self.check_int_rounding(lambda ns, rnd: PyTime_AsSecondsDouble(ns),
                                float_converter,
                                NS_TO_SEC)

def create_decimal_converter(self, denominator):
        denom = decimal.Decimal(denominator)

def converter(value):
            d = decimal.Decimal(value) / denom
            return self.decimal_round(d)

return converter

def test_AsTimeval(self):
        from _testinternalcapi import _PyTime_AsTimeval

us_converter = self.create_decimal_converter(US_TO_NS)

def timeval_converter(ns):
            us = us_converter(ns)
            return divmod(us, SEC_TO_US)

if sys.platform == 'win32':
            from _testcapi import LONG_MIN, LONG_MAX

# On Windows, timeval.tv_sec type is a C long
            def seconds_filter(secs):
                return LONG_MIN <= secs <= LONG_MAX
        else:
            seconds_filter = self.time_t_filter

self.check_int_rounding(_PyTime_AsTimeval,
                                timeval_converter,
                                NS_TO_SEC,
                                value_filter=seconds_filter)

@unittest.skipUnless(hasattr(_testinternalcapi, '_PyTime_AsTimespec'),
                         'need _testinternalcapi._PyTime_AsTimespec')
    def test_AsTimespec(self):
        from _testinternalcapi import _PyTime_AsTimespec

def timespec_converter(ns):
            return divmod(ns, SEC_TO_NS)

self.check_int_rounding(lambda ns, rnd: _PyTime_AsTimespec(ns),
                                timespec_converter,
                                NS_TO_SEC,
                                value_filter=self.time_t_filter)

@unittest.skipUnless(hasattr(_testinternalcapi, '_PyTime_AsTimeval_clamp'),
                         'need _testinternalcapi._PyTime_AsTimeval_clamp')
    def test_AsTimeval_clamp(self):
        from _testinternalcapi import _PyTime_AsTimeval_clamp

if sys.platform == 'win32':
            from _testcapi import LONG_MIN, LONG_MAX
            tv_sec_max = LONG_MAX
            tv_sec_min = LONG_MIN
        else:
            tv_sec_max = self.time_t_max
            tv_sec_min = self.time_t_min

for t in (PyTime_MIN, PyTime_MAX):
            ts = _PyTime_AsTimeval_clamp(t, _PyTime.ROUND_CEILING)
            with decimal.localcontext() as context:
                context.rounding = decimal.ROUND_CEILING
                us = self.decimal_round(decimal.Decimal(t) / US_TO_NS)
            tv_sec, tv_usec = divmod(us, SEC_TO_US)
            if tv_sec_max < tv_sec:
                tv_sec = tv_sec_max
                tv_usec = 0
            elif tv_sec < tv_sec_min:
                tv_sec = tv_sec_min
                tv_usec = 0
            self.assertEqual(ts, (tv_sec, tv_usec))

@unittest.skipUnless(hasattr(_testinternalcapi, '_PyTime_AsTimespec_clamp'),
                         'need _testinternalcapi._PyTime_AsTimespec_clamp')
    def test_AsTimespec_clamp(self):
        from _testinternalcapi import _PyTime_AsTimespec_clamp

for t in (PyTime_MIN, PyTime_MAX):
            ts = _PyTime_AsTimespec_clamp(t)
            tv_sec, tv_nsec = divmod(t, NS_TO_SEC)
            if self.time_t_max < tv_sec:
                tv_sec = self.time_t_max
                tv_nsec = 0
            elif tv_sec < self.time_t_min:
                tv_sec = self.time_t_min
                tv_nsec = 0
            self.assertEqual(ts, (tv_sec, tv_nsec))

def test_AsMilliseconds(self):
        from _testinternalcapi import _PyTime_AsMilliseconds

self.check_int_rounding(_PyTime_AsMilliseconds,
                                self.create_decimal_converter(MS_TO_NS),
                                NS_TO_SEC)

def test_AsMicroseconds(self):
        from _testinternalcapi import _PyTime_AsMicroseconds

self.check_int_rounding(_PyTime_AsMicroseconds,
                                self.create_decimal_converter(US_TO_NS),
                                NS_TO_SEC)

class TestOldPyTime(CPyTimeTestCase, unittest.TestCase):
    """
    Test the old C _PyTime_t API: _PyTime_ObjectToXXX() functions.
    """

# time_t is a 32-bit or 64-bit signed integer
    OVERFLOW_SECONDS = 2 ** 64

def test_object_to_time_t(self):
        from _testinternalcapi import _PyTime_ObjectToTime_t

self.check_int_rounding(_PyTime_ObjectToTime_t,
                                lambda secs: secs,
                                value_filter=self.time_t_filter)

self.check_float_rounding(_PyTime_ObjectToTime_t,
                                  self.decimal_round,
                                  value_filter=self.time_t_filter)

def create_converter(self, sec_to_unit):
        def converter(secs):
            floatpart, intpart = math.modf(secs)
            intpart = int(intpart)
            floatpart *= sec_to_unit
            floatpart = self.decimal_round(floatpart)
            if floatpart < 0:
                floatpart += sec_to_unit
                intpart -= 1
            elif floatpart >= sec_to_unit:
                floatpart -= sec_to_unit
                intpart += 1
            return (intpart, floatpart)
        return converter

def test_object_to_timeval(self):
        from _testinternalcapi import _PyTime_ObjectToTimeval

self.check_int_rounding(_PyTime_ObjectToTimeval,
                                lambda secs: (secs, 0),
                                value_filter=self.time_t_filter)

self.check_float_rounding(_PyTime_ObjectToTimeval,
                                  self.create_converter(SEC_TO_US),
                                  value_filter=self.time_t_filter)

# test nan
        for time_rnd, _ in ROUNDING_MODES:
            with self.assertRaises(ValueError):
                _PyTime_ObjectToTimeval(float('nan'), time_rnd)

def test_object_to_timespec(self):
        from _testinternalcapi import _PyTime_ObjectToTimespec

self.check_int_rounding(_PyTime_ObjectToTimespec,
                                lambda secs: (secs, 0),
                                value_filter=self.time_t_filter)

self.check_float_rounding(_PyTime_ObjectToTimespec,
                                  self.create_converter(SEC_TO_NS),
                                  value_filter=self.time_t_filter)

# test nan
        for time_rnd, _ in ROUNDING_MODES:
            with self.assertRaises(ValueError):
                _PyTime_ObjectToTimespec(float('nan'), time_rnd)

@unittest.skipUnless(sys.platform == "darwin", "test weak linking on macOS")
class TestTimeWeaklinking(unittest.TestCase):
    # These test cases verify that weak linking support on macOS works
    # as expected. These cases only test new behaviour introduced by weak linking,
    # regular behaviour is tested by the normal test cases.
    #
    # See the section on Weak Linking in Mac/README.txt for more information.
    def test_clock_functions(self):
        import sysconfig
        import platform

config_vars = sysconfig.get_config_vars()
        var_name = "HAVE_CLOCK_GETTIME"
        if var_name not in config_vars or not config_vars[var_name]:
            raise unittest.SkipTest(f"{var_name} is not available")

mac_ver = tuple(int(x) for x in platform.mac_ver()[0].split("."))

clock_names = [
            "CLOCK_MONOTONIC", "clock_gettime", "clock_gettime_ns", "clock_settime",
            "clock_settime_ns", "clock_getres"]

if mac_ver >= (10, 12):
            for name in clock_names:
                self.assertTrue(hasattr(time, name), f"time.{name} is not available")

else:
            for name in clock_names:
                self.assertFalse(hasattr(time, name), f"time.{name} is available")

if __name__ == "__main__":
    unittest.main()