mirrors/cpython
0
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2024-12-19 14:53:39 +08:00
Code Issues Packages Projects Releases Wiki Activity
2ae4ad7ca4
cpython/Lib/test/test_time.py
Victor Stinner c29b585fd4
bpo-31784: Implement PEP 564: add time.time_ns() (#3989) 
Add new time functions:

* time.clock_gettime_ns()
* time.clock_settime_ns()
* time.monotonic_ns()
* time.perf_counter_ns()
* time.process_time_ns()
* time.time_ns()

Add new _PyTime functions:

* _PyTime_FromTimespec()
* _PyTime_FromNanosecondsObject()
* _PyTime_FromTimeval()

Other changes:

* Add also os.times() tests to test_os.
* pytime_fromtimeval() and pytime_fromtimeval() now return
  _PyTime_MAX or _PyTime_MIN on overflow, rather than undefined
  behaviour
* _PyTime_FromNanoseconds() parameter type changes from long long to
  _PyTime_t
2017-11-02 07:28:27 -07:00

1034 lines
38 KiB
Python
Raw Blame History

from test import support
import decimal
import enum
import locale
import math
import platform
import sys
import sysconfig
import time
import threading
import unittest
import warnings
try:
import _testcapi
except ImportError:
_testcapi = None
# 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
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
# 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, 'clock_gettime'):
check_ns(time.clock_gettime(time.CLOCK_REALTIME),
time.clock_gettime_ns(time.CLOCK_REALTIME))
def test_clock(self):
with self.assertWarns(DeprecationWarning):
time.clock()
with self.assertWarns(DeprecationWarning):
info = time.get_clock_info('clock')
self.assertTrue(info.monotonic)
self.assertFalse(info.adjustable)
@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)
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(self):
self.assertRaises(ValueError, time.sleep, -2)
self.assertRaises(ValueError, time.sleep, -1)
time.sleep(1.2)
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)
# embedded null character
self.assertRaises(ValueError, time.strftime, '%S\0', tt)
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 support.check_warnings():
result = time.strftime("%Y %m %d %H %M %S %w %j", (2000,)+(0,)*8)
self.assertEqual(expected, result)
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
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.assertIs(e.exception.__suppress_context__, True)
# additional check for IndexError branch (issue #19545)
with self.assertRaises(ValueError) as e:
time.strptime('19', '%Y %')
self.assertIs(e.exception.__suppress_context__, True)
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):
if sys.platform.startswith('aix') and t == -1:
# Issue #11188, #19748: mktime() returns -1 on error. On Linux,
# the tm_wday field is used as a sentinel () to detect if -1 is
# really an error or a valid timestamp. On AIX, tm_wday is
# unchanged even on success and so cannot be used as a
# sentinel.
continue
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 error
# on all platfom. 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)
# Issue #20101: On some Windows machines, dt may be slightly low
self.assertTrue(0.45 <= dt <= 1.0, 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()
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)
@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 = ['clock', 'monotonic', 'perf_counter', 'process_time', 'time']
for name in clocks:
if name == 'clock':
with self.assertWarns(DeprecationWarning):
info = time.get_clock_info('clock')
else:
info = time.get_clock_info(name)
#self.assertIsInstance(info, dict)
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):
def setUp(self):
self.oldloc = locale.setlocale(locale.LC_ALL)
def tearDown(self):
locale.setlocale(locale.LC_ALL, self.oldloc)
def test_bug_3061(self):
try:
tmp = locale.setlocale(locale.LC_ALL, "fr_FR")
except locale.Error:
self.skipTest('could not set locale.LC_ALL to fr_FR')
# 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)
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 = "strftime() is limited to [1; 9999] with Visual Studio"
# Check that it doesn't crash for year > 9999
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), '12345')
self.assertEqual(self.yearstr(123456789), '123456789')
self.assertEqual(self.yearstr(TIME_MAXYEAR), 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 + 1900), str(TIME_MINYEAR + 1900))
# Issue #13312: it may return wrong value for year < TIME_MINYEAR + 1900
# Skip the value test, but check that no error is raised
self.yearstr(TIME_MINYEAR)
# self.assertEqual(self.yearstr(TIME_MINYEAR), str(TIME_MINYEAR))
self.assertRaises(OverflowError, self.yearstr, TIME_MINYEAR - 1)
class TestAsctime4dyear(_TestAsctimeYear, _Test4dYear, unittest.TestCase):
pass
class TestStrftime4dyear(_TestStrftimeYear, _Test4dYear, unittest.TestCase):
pass
class TestPytime(unittest.TestCase):
@unittest.skipUnless(time._STRUCT_TM_ITEMS == 11, "needs tm_zone support")
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 _testcapi module')
class CPyTimeTestCase:
"""
Base class to test the C _PyTime_t API.
"""
OVERFLOW_SECONDS = None
def setUp(self):
from _testcapi 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 :
context = decimal.getcontext()
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 as exc:
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 _testcapi 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 _testcapi 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)
# test nan
for time_rnd, _ in ROUNDING_MODES:
with self.assertRaises(TypeError):
PyTime_AsSecondsDouble(float('nan'))
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 _testcapi 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(_testcapi, 'PyTime_AsTimespec'),
'need _testcapi.PyTime_AsTimespec')
def test_AsTimespec(self):
from _testcapi 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)
def test_AsMilliseconds(self):
from _testcapi import PyTime_AsMilliseconds
self.check_int_rounding(PyTime_AsMilliseconds,
self.create_decimal_converter(MS_TO_NS),
NS_TO_SEC)
def test_AsMicroseconds(self):
from _testcapi 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 _testcapi import pytime_object_to_time_t
self.check_int_rounding(pytime_object_to_time_t,
lambda secs: secs,
value_filter=self.time_t_filter)
self.check_float_rounding(pytime_object_to_time_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 _testcapi import pytime_object_to_timeval
self.check_int_rounding(pytime_object_to_timeval,
lambda secs: (secs, 0),
value_filter=self.time_t_filter)
self.check_float_rounding(pytime_object_to_timeval,
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_object_to_timeval(float('nan'), time_rnd)
def test_object_to_timespec(self):
from _testcapi import pytime_object_to_timespec
self.check_int_rounding(pytime_object_to_timespec,
lambda secs: (secs, 0),
value_filter=self.time_t_filter)
self.check_float_rounding(pytime_object_to_timespec,
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_object_to_timespec(float('nan'), time_rnd)
if __name__ == "__main__":
unittest.main()
Reference in New Issue View Git Blame Copy Permalink