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datetimetester.py
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6702 lines (5722 loc) · 262 KB
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"""Test date/time type.
See https://www.zope.dev/Members/fdrake/DateTimeWiki/TestCases
"""
import bisect
import copy
import decimal
import io
import itertools
import os
import pickle
import random
import re
import struct
import sys
import unittest
import warnings
from array import array
from operator import lt, le, gt, ge, eq, ne, truediv, floordiv, mod
from test import support
from test.support import is_resource_enabled, ALWAYS_EQ, LARGEST, SMALLEST
import datetime as datetime_module
from datetime import MINYEAR, MAXYEAR
from datetime import timedelta
from datetime import tzinfo
from datetime import time
from datetime import timezone
from datetime import UTC
from datetime import date, datetime
import time as _time
try:
import _testcapi
except ImportError:
_testcapi = None
# Needed by test_datetime
import _strptime
try:
import _pydatetime
except ImportError:
pass
#
pickle_loads = {pickle.loads, pickle._loads}
pickle_choices = [(pickle, pickle, proto)
for proto in range(pickle.HIGHEST_PROTOCOL + 1)]
assert len(pickle_choices) == pickle.HIGHEST_PROTOCOL + 1
EPOCH_NAIVE = datetime(1970, 1, 1, 0, 0) # For calculating transitions
# An arbitrary collection of objects of non-datetime types, for testing
# mixed-type comparisons.
OTHERSTUFF = (10, 34.5, "abc", {}, [], ())
# XXX Copied from test_float.
INF = float("inf")
NAN = float("nan")
#############################################################################
# module tests
class TestModule(unittest.TestCase):
def test_constants(self):
datetime = datetime_module
self.assertEqual(datetime.MINYEAR, 1)
self.assertEqual(datetime.MAXYEAR, 9999)
def test_utc_alias(self):
self.assertIs(UTC, timezone.utc)
def test_all(self):
"""Test that __all__ only points to valid attributes."""
all_attrs = dir(datetime_module)
for attr in datetime_module.__all__:
self.assertIn(attr, all_attrs)
def test_name_cleanup(self):
if '_Pure' in self.__class__.__name__:
self.skipTest('Only run for Fast C implementation')
datetime = datetime_module
names = set(name for name in dir(datetime)
if not name.startswith('__') and not name.endswith('__'))
allowed = set(['MAXYEAR', 'MINYEAR', 'date', 'datetime',
'datetime_CAPI', 'time', 'timedelta', 'timezone',
'tzinfo', 'UTC', 'sys'])
self.assertEqual(names - allowed, set([]))
def test_divide_and_round(self):
if '_Fast' in self.__class__.__name__:
self.skipTest('Only run for Pure Python implementation')
dar = _pydatetime._divide_and_round
self.assertEqual(dar(-10, -3), 3)
self.assertEqual(dar(5, -2), -2)
# four cases: (2 signs of a) x (2 signs of b)
self.assertEqual(dar(7, 3), 2)
self.assertEqual(dar(-7, 3), -2)
self.assertEqual(dar(7, -3), -2)
self.assertEqual(dar(-7, -3), 2)
# ties to even - eight cases:
# (2 signs of a) x (2 signs of b) x (even / odd quotient)
self.assertEqual(dar(10, 4), 2)
self.assertEqual(dar(-10, 4), -2)
self.assertEqual(dar(10, -4), -2)
self.assertEqual(dar(-10, -4), 2)
self.assertEqual(dar(6, 4), 2)
self.assertEqual(dar(-6, 4), -2)
self.assertEqual(dar(6, -4), -2)
self.assertEqual(dar(-6, -4), 2)
#############################################################################
# tzinfo tests
class FixedOffset(tzinfo):
def __init__(self, offset, name, dstoffset=42):
if isinstance(offset, int):
offset = timedelta(minutes=offset)
if isinstance(dstoffset, int):
dstoffset = timedelta(minutes=dstoffset)
self.__offset = offset
self.__name = name
self.__dstoffset = dstoffset
def __repr__(self):
return self.__name.lower()
def utcoffset(self, dt):
return self.__offset
def tzname(self, dt):
return self.__name
def dst(self, dt):
return self.__dstoffset
class PicklableFixedOffset(FixedOffset):
def __init__(self, offset=None, name=None, dstoffset=None):
FixedOffset.__init__(self, offset, name, dstoffset)
class PicklableFixedOffsetWithSlots(PicklableFixedOffset):
__slots__ = '_FixedOffset__offset', '_FixedOffset__name', 'spam'
class _TZInfo(tzinfo):
def utcoffset(self, datetime_module):
return random.random()
class TestTZInfo(unittest.TestCase):
def test_refcnt_crash_bug_22044(self):
tz1 = _TZInfo()
dt1 = datetime(2014, 7, 21, 11, 32, 3, 0, tz1)
with self.assertRaises(TypeError):
dt1.utcoffset()
def test_non_abstractness(self):
# In order to allow subclasses to get pickled, the C implementation
# wasn't able to get away with having __init__ raise
# NotImplementedError.
useless = tzinfo()
dt = datetime.max
self.assertRaises(NotImplementedError, useless.tzname, dt)
self.assertRaises(NotImplementedError, useless.utcoffset, dt)
self.assertRaises(NotImplementedError, useless.dst, dt)
def test_subclass_must_override(self):
class NotEnough(tzinfo):
def __init__(self, offset, name):
self.__offset = offset
self.__name = name
self.assertTrue(issubclass(NotEnough, tzinfo))
ne = NotEnough(3, "NotByALongShot")
self.assertIsInstance(ne, tzinfo)
dt = datetime.now()
self.assertRaises(NotImplementedError, ne.tzname, dt)
self.assertRaises(NotImplementedError, ne.utcoffset, dt)
self.assertRaises(NotImplementedError, ne.dst, dt)
def test_normal(self):
fo = FixedOffset(3, "Three")
self.assertIsInstance(fo, tzinfo)
for dt in datetime.now(), None:
self.assertEqual(fo.utcoffset(dt), timedelta(minutes=3))
self.assertEqual(fo.tzname(dt), "Three")
self.assertEqual(fo.dst(dt), timedelta(minutes=42))
def test_pickling_base(self):
# There's no point to pickling tzinfo objects on their own (they
# carry no data), but they need to be picklable anyway else
# concrete subclasses can't be pickled.
orig = tzinfo.__new__(tzinfo)
self.assertIs(type(orig), tzinfo)
for pickler, unpickler, proto in pickle_choices:
green = pickler.dumps(orig, proto)
derived = unpickler.loads(green)
self.assertIs(type(derived), tzinfo)
def test_pickling_subclass(self):
# Make sure we can pickle/unpickle an instance of a subclass.
offset = timedelta(minutes=-300)
for otype, args in [
(PicklableFixedOffset, (offset, 'cookie')),
(PicklableFixedOffsetWithSlots, (offset, 'cookie')),
(timezone, (offset,)),
(timezone, (offset, "EST"))]:
orig = otype(*args)
oname = orig.tzname(None)
self.assertIsInstance(orig, tzinfo)
self.assertIs(type(orig), otype)
self.assertEqual(orig.utcoffset(None), offset)
self.assertEqual(orig.tzname(None), oname)
for pickler, unpickler, proto in pickle_choices:
green = pickler.dumps(orig, proto)
derived = unpickler.loads(green)
self.assertIsInstance(derived, tzinfo)
self.assertIs(type(derived), otype)
self.assertEqual(derived.utcoffset(None), offset)
self.assertEqual(derived.tzname(None), oname)
self.assertFalse(hasattr(derived, 'spam'))
def test_issue23600(self):
DSTDIFF = DSTOFFSET = timedelta(hours=1)
class UKSummerTime(tzinfo):
"""Simple time zone which pretends to always be in summer time, since
that's what shows the failure.
"""
def utcoffset(self, dt):
return DSTOFFSET
def dst(self, dt):
return DSTDIFF
def tzname(self, dt):
return 'UKSummerTime'
tz = UKSummerTime()
u = datetime(2014, 4, 26, 12, 1, tzinfo=tz)
t = tz.fromutc(u)
self.assertEqual(t - t.utcoffset(), u)
class TestTimeZone(unittest.TestCase):
def setUp(self):
self.ACDT = timezone(timedelta(hours=9.5), 'ACDT')
self.EST = timezone(-timedelta(hours=5), 'EST')
self.DT = datetime(2010, 1, 1)
def test_str(self):
for tz in [self.ACDT, self.EST, timezone.utc,
timezone.min, timezone.max]:
self.assertEqual(str(tz), tz.tzname(None))
def test_repr(self):
datetime = datetime_module
for tz in [self.ACDT, self.EST, timezone.utc,
timezone.min, timezone.max]:
# test round-trip
tzrep = repr(tz)
self.assertEqual(tz, eval(tzrep))
def test_class_members(self):
limit = timedelta(hours=23, minutes=59)
self.assertEqual(timezone.utc.utcoffset(None), ZERO)
self.assertEqual(timezone.min.utcoffset(None), -limit)
self.assertEqual(timezone.max.utcoffset(None), limit)
def test_constructor(self):
self.assertIs(timezone.utc, timezone(timedelta(0)))
self.assertIsNot(timezone.utc, timezone(timedelta(0), 'UTC'))
self.assertEqual(timezone.utc, timezone(timedelta(0), 'UTC'))
for subminute in [timedelta(microseconds=1), timedelta(seconds=1)]:
tz = timezone(subminute)
self.assertNotEqual(tz.utcoffset(None) % timedelta(minutes=1), 0)
# invalid offsets
for invalid in [timedelta(1, 1), timedelta(1)]:
self.assertRaises(ValueError, timezone, invalid)
self.assertRaises(ValueError, timezone, -invalid)
with self.assertRaises(TypeError): timezone(None)
with self.assertRaises(TypeError): timezone(42)
with self.assertRaises(TypeError): timezone(ZERO, None)
with self.assertRaises(TypeError): timezone(ZERO, 42)
with self.assertRaises(TypeError): timezone(ZERO, 'ABC', 'extra')
def test_inheritance(self):
self.assertIsInstance(timezone.utc, tzinfo)
self.assertIsInstance(self.EST, tzinfo)
def test_utcoffset(self):
dummy = self.DT
for h in [0, 1.5, 12]:
offset = h * HOUR
self.assertEqual(offset, timezone(offset).utcoffset(dummy))
self.assertEqual(-offset, timezone(-offset).utcoffset(dummy))
with self.assertRaises(TypeError): self.EST.utcoffset('')
with self.assertRaises(TypeError): self.EST.utcoffset(5)
def test_dst(self):
self.assertIsNone(timezone.utc.dst(self.DT))
with self.assertRaises(TypeError): self.EST.dst('')
with self.assertRaises(TypeError): self.EST.dst(5)
def test_tzname(self):
self.assertEqual('UTC', timezone.utc.tzname(None))
self.assertEqual('UTC', UTC.tzname(None))
self.assertEqual('UTC', timezone(ZERO).tzname(None))
self.assertEqual('UTC-05:00', timezone(-5 * HOUR).tzname(None))
self.assertEqual('UTC+09:30', timezone(9.5 * HOUR).tzname(None))
self.assertEqual('UTC-00:01', timezone(timedelta(minutes=-1)).tzname(None))
self.assertEqual('XYZ', timezone(-5 * HOUR, 'XYZ').tzname(None))
# bpo-34482: Check that surrogates are handled properly.
self.assertEqual('\ud800', timezone(ZERO, '\ud800').tzname(None))
# Sub-minute offsets:
self.assertEqual('UTC+01:06:40', timezone(timedelta(0, 4000)).tzname(None))
self.assertEqual('UTC-01:06:40',
timezone(-timedelta(0, 4000)).tzname(None))
self.assertEqual('UTC+01:06:40.000001',
timezone(timedelta(0, 4000, 1)).tzname(None))
self.assertEqual('UTC-01:06:40.000001',
timezone(-timedelta(0, 4000, 1)).tzname(None))
with self.assertRaises(TypeError): self.EST.tzname('')
with self.assertRaises(TypeError): self.EST.tzname(5)
def test_fromutc(self):
with self.assertRaises(ValueError):
timezone.utc.fromutc(self.DT)
with self.assertRaises(TypeError):
timezone.utc.fromutc('not datetime')
for tz in [self.EST, self.ACDT, Eastern]:
utctime = self.DT.replace(tzinfo=tz)
local = tz.fromutc(utctime)
self.assertEqual(local - utctime, tz.utcoffset(local))
self.assertEqual(local,
self.DT.replace(tzinfo=timezone.utc))
def test_comparison(self):
self.assertNotEqual(timezone(ZERO), timezone(HOUR))
self.assertEqual(timezone(HOUR), timezone(HOUR))
self.assertEqual(timezone(-5 * HOUR), timezone(-5 * HOUR, 'EST'))
with self.assertRaises(TypeError): timezone(ZERO) < timezone(ZERO)
self.assertIn(timezone(ZERO), {timezone(ZERO)})
self.assertTrue(timezone(ZERO) != None)
self.assertFalse(timezone(ZERO) == None)
tz = timezone(ZERO)
self.assertTrue(tz == ALWAYS_EQ)
self.assertFalse(tz != ALWAYS_EQ)
self.assertTrue(tz < LARGEST)
self.assertFalse(tz > LARGEST)
self.assertTrue(tz <= LARGEST)
self.assertFalse(tz >= LARGEST)
self.assertFalse(tz < SMALLEST)
self.assertTrue(tz > SMALLEST)
self.assertFalse(tz <= SMALLEST)
self.assertTrue(tz >= SMALLEST)
def test_aware_datetime(self):
# test that timezone instances can be used by datetime
t = datetime(1, 1, 1)
for tz in [timezone.min, timezone.max, timezone.utc]:
self.assertEqual(tz.tzname(t),
t.replace(tzinfo=tz).tzname())
self.assertEqual(tz.utcoffset(t),
t.replace(tzinfo=tz).utcoffset())
self.assertEqual(tz.dst(t),
t.replace(tzinfo=tz).dst())
def test_pickle(self):
for tz in self.ACDT, self.EST, timezone.min, timezone.max:
for pickler, unpickler, proto in pickle_choices:
tz_copy = unpickler.loads(pickler.dumps(tz, proto))
self.assertEqual(tz_copy, tz)
tz = timezone.utc
for pickler, unpickler, proto in pickle_choices:
tz_copy = unpickler.loads(pickler.dumps(tz, proto))
self.assertIs(tz_copy, tz)
def test_copy(self):
for tz in self.ACDT, self.EST, timezone.min, timezone.max:
tz_copy = copy.copy(tz)
self.assertEqual(tz_copy, tz)
tz = timezone.utc
tz_copy = copy.copy(tz)
self.assertIs(tz_copy, tz)
def test_deepcopy(self):
for tz in self.ACDT, self.EST, timezone.min, timezone.max:
tz_copy = copy.deepcopy(tz)
self.assertEqual(tz_copy, tz)
tz = timezone.utc
tz_copy = copy.deepcopy(tz)
self.assertIs(tz_copy, tz)
def test_offset_boundaries(self):
# Test timedeltas close to the boundaries
time_deltas = [
timedelta(hours=23, minutes=59),
timedelta(hours=23, minutes=59, seconds=59),
timedelta(hours=23, minutes=59, seconds=59, microseconds=999999),
]
time_deltas.extend([-delta for delta in time_deltas])
for delta in time_deltas:
with self.subTest(test_type='good', delta=delta):
timezone(delta)
# Test timedeltas on and outside the boundaries
bad_time_deltas = [
timedelta(hours=24),
timedelta(hours=24, microseconds=1),
]
bad_time_deltas.extend([-delta for delta in bad_time_deltas])
for delta in bad_time_deltas:
with self.subTest(test_type='bad', delta=delta):
with self.assertRaises(ValueError):
timezone(delta)
def test_comparison_with_tzinfo(self):
# Constructing tzinfo objects directly should not be done by users
# and serves only to check the bug described in bpo-37915
self.assertNotEqual(timezone.utc, tzinfo())
self.assertNotEqual(timezone(timedelta(hours=1)), tzinfo())
#############################################################################
# Base class for testing a particular aspect of timedelta, time, date and
# datetime comparisons.
class HarmlessMixedComparison:
# Test that __eq__ and __ne__ don't complain for mixed-type comparisons.
# Subclasses must define 'theclass', and theclass(1, 1, 1) must be a
# legit constructor.
def test_harmless_mixed_comparison(self):
me = self.theclass(1, 1, 1)
self.assertFalse(me == ())
self.assertTrue(me != ())
self.assertFalse(() == me)
self.assertTrue(() != me)
self.assertIn(me, [1, 20, [], me])
self.assertIn([], [me, 1, 20, []])
# Comparison to objects of unsupported types should return
# NotImplemented which falls back to the right hand side's __eq__
# method. In this case, ALWAYS_EQ.__eq__ always returns True.
# ALWAYS_EQ.__ne__ always returns False.
self.assertTrue(me == ALWAYS_EQ)
self.assertFalse(me != ALWAYS_EQ)
# If the other class explicitly defines ordering
# relative to our class, it is allowed to do so
self.assertTrue(me < LARGEST)
self.assertFalse(me > LARGEST)
self.assertTrue(me <= LARGEST)
self.assertFalse(me >= LARGEST)
self.assertFalse(me < SMALLEST)
self.assertTrue(me > SMALLEST)
self.assertFalse(me <= SMALLEST)
self.assertTrue(me >= SMALLEST)
def test_harmful_mixed_comparison(self):
me = self.theclass(1, 1, 1)
self.assertRaises(TypeError, lambda: me < ())
self.assertRaises(TypeError, lambda: me <= ())
self.assertRaises(TypeError, lambda: me > ())
self.assertRaises(TypeError, lambda: me >= ())
self.assertRaises(TypeError, lambda: () < me)
self.assertRaises(TypeError, lambda: () <= me)
self.assertRaises(TypeError, lambda: () > me)
self.assertRaises(TypeError, lambda: () >= me)
#############################################################################
# timedelta tests
class TestTimeDelta(HarmlessMixedComparison, unittest.TestCase):
theclass = timedelta
def test_constructor(self):
eq = self.assertEqual
td = timedelta
# Check keyword args to constructor
eq(td(), td(weeks=0, days=0, hours=0, minutes=0, seconds=0,
milliseconds=0, microseconds=0))
eq(td(1), td(days=1))
eq(td(0, 1), td(seconds=1))
eq(td(0, 0, 1), td(microseconds=1))
eq(td(weeks=1), td(days=7))
eq(td(days=1), td(hours=24))
eq(td(hours=1), td(minutes=60))
eq(td(minutes=1), td(seconds=60))
eq(td(seconds=1), td(milliseconds=1000))
eq(td(milliseconds=1), td(microseconds=1000))
# Check float args to constructor
eq(td(weeks=1.0/7), td(days=1))
eq(td(days=1.0/24), td(hours=1))
eq(td(hours=1.0/60), td(minutes=1))
eq(td(minutes=1.0/60), td(seconds=1))
eq(td(seconds=0.001), td(milliseconds=1))
eq(td(milliseconds=0.001), td(microseconds=1))
def test_computations(self):
eq = self.assertEqual
td = timedelta
a = td(7) # One week
b = td(0, 60) # One minute
c = td(0, 0, 1000) # One millisecond
eq(a+b+c, td(7, 60, 1000))
eq(a-b, td(6, 24*3600 - 60))
eq(b.__rsub__(a), td(6, 24*3600 - 60))
eq(-a, td(-7))
eq(+a, td(7))
eq(-b, td(-1, 24*3600 - 60))
eq(-c, td(-1, 24*3600 - 1, 999000))
eq(abs(a), a)
eq(abs(-a), a)
eq(td(6, 24*3600), a)
eq(td(0, 0, 60*1000000), b)
eq(a*10, td(70))
eq(a*10, 10*a)
eq(a*10, 10*a)
eq(b*10, td(0, 600))
eq(10*b, td(0, 600))
eq(b*10, td(0, 600))
eq(c*10, td(0, 0, 10000))
eq(10*c, td(0, 0, 10000))
eq(c*10, td(0, 0, 10000))
eq(a*-1, -a)
eq(b*-2, -b-b)
eq(c*-2, -c+-c)
eq(b*(60*24), (b*60)*24)
eq(b*(60*24), (60*b)*24)
eq(c*1000, td(0, 1))
eq(1000*c, td(0, 1))
eq(a//7, td(1))
eq(b//10, td(0, 6))
eq(c//1000, td(0, 0, 1))
eq(a//10, td(0, 7*24*360))
eq(a//3600000, td(0, 0, 7*24*1000))
eq(a/0.5, td(14))
eq(b/0.5, td(0, 120))
eq(a/7, td(1))
eq(b/10, td(0, 6))
eq(c/1000, td(0, 0, 1))
eq(a/10, td(0, 7*24*360))
eq(a/3600000, td(0, 0, 7*24*1000))
# Multiplication by float
us = td(microseconds=1)
eq((3*us) * 0.5, 2*us)
eq((5*us) * 0.5, 2*us)
eq(0.5 * (3*us), 2*us)
eq(0.5 * (5*us), 2*us)
eq((-3*us) * 0.5, -2*us)
eq((-5*us) * 0.5, -2*us)
# Issue #23521
eq(td(seconds=1) * 0.123456, td(microseconds=123456))
eq(td(seconds=1) * 0.6112295, td(microseconds=611229))
# Division by int and float
eq((3*us) / 2, 2*us)
eq((5*us) / 2, 2*us)
eq((-3*us) / 2.0, -2*us)
eq((-5*us) / 2.0, -2*us)
eq((3*us) / -2, -2*us)
eq((5*us) / -2, -2*us)
eq((3*us) / -2.0, -2*us)
eq((5*us) / -2.0, -2*us)
for i in range(-10, 10):
eq((i*us/3)//us, round(i/3))
for i in range(-10, 10):
eq((i*us/-3)//us, round(i/-3))
# Issue #23521
eq(td(seconds=1) / (1 / 0.6112295), td(microseconds=611229))
# Issue #11576
eq(td(999999999, 86399, 999999) - td(999999999, 86399, 999998),
td(0, 0, 1))
eq(td(999999999, 1, 1) - td(999999999, 1, 0),
td(0, 0, 1))
def test_disallowed_computations(self):
a = timedelta(42)
# Add/sub ints or floats should be illegal
for i in 1, 1.0:
self.assertRaises(TypeError, lambda: a+i)
self.assertRaises(TypeError, lambda: a-i)
self.assertRaises(TypeError, lambda: i+a)
self.assertRaises(TypeError, lambda: i-a)
# Division of int by timedelta doesn't make sense.
# Division by zero doesn't make sense.
zero = 0
self.assertRaises(TypeError, lambda: zero // a)
self.assertRaises(ZeroDivisionError, lambda: a // zero)
self.assertRaises(ZeroDivisionError, lambda: a / zero)
self.assertRaises(ZeroDivisionError, lambda: a / 0.0)
self.assertRaises(TypeError, lambda: a / '')
@support.requires_IEEE_754
def test_disallowed_special(self):
a = timedelta(42)
self.assertRaises(ValueError, a.__mul__, NAN)
self.assertRaises(ValueError, a.__truediv__, NAN)
def test_basic_attributes(self):
days, seconds, us = 1, 7, 31
td = timedelta(days, seconds, us)
self.assertEqual(td.days, days)
self.assertEqual(td.seconds, seconds)
self.assertEqual(td.microseconds, us)
def test_total_seconds(self):
td = timedelta(days=365)
self.assertEqual(td.total_seconds(), 31536000.0)
for total_seconds in [123456.789012, -123456.789012, 0.123456, 0, 1e6]:
td = timedelta(seconds=total_seconds)
self.assertEqual(td.total_seconds(), total_seconds)
# Issue8644: Test that td.total_seconds() has the same
# accuracy as td / timedelta(seconds=1).
for ms in [-1, -2, -123]:
td = timedelta(microseconds=ms)
self.assertEqual(td.total_seconds(), td / timedelta(seconds=1))
def test_carries(self):
t1 = timedelta(days=100,
weeks=-7,
hours=-24*(100-49),
minutes=-3,
seconds=12,
microseconds=(3*60 - 12) * 1e6 + 1)
t2 = timedelta(microseconds=1)
self.assertEqual(t1, t2)
def test_hash_equality(self):
t1 = timedelta(days=100,
weeks=-7,
hours=-24*(100-49),
minutes=-3,
seconds=12,
microseconds=(3*60 - 12) * 1000000)
t2 = timedelta()
self.assertEqual(hash(t1), hash(t2))
t1 += timedelta(weeks=7)
t2 += timedelta(days=7*7)
self.assertEqual(t1, t2)
self.assertEqual(hash(t1), hash(t2))
d = {t1: 1}
d[t2] = 2
self.assertEqual(len(d), 1)
self.assertEqual(d[t1], 2)
def test_pickling(self):
args = 12, 34, 56
orig = timedelta(*args)
for pickler, unpickler, proto in pickle_choices:
green = pickler.dumps(orig, proto)
derived = unpickler.loads(green)
self.assertEqual(orig, derived)
def test_compare(self):
t1 = timedelta(2, 3, 4)
t2 = timedelta(2, 3, 4)
self.assertEqual(t1, t2)
self.assertTrue(t1 <= t2)
self.assertTrue(t1 >= t2)
self.assertFalse(t1 != t2)
self.assertFalse(t1 < t2)
self.assertFalse(t1 > t2)
for args in (3, 3, 3), (2, 4, 4), (2, 3, 5):
t2 = timedelta(*args) # this is larger than t1
self.assertTrue(t1 < t2)
self.assertTrue(t2 > t1)
self.assertTrue(t1 <= t2)
self.assertTrue(t2 >= t1)
self.assertTrue(t1 != t2)
self.assertTrue(t2 != t1)
self.assertFalse(t1 == t2)
self.assertFalse(t2 == t1)
self.assertFalse(t1 > t2)
self.assertFalse(t2 < t1)
self.assertFalse(t1 >= t2)
self.assertFalse(t2 <= t1)
for badarg in OTHERSTUFF:
self.assertEqual(t1 == badarg, False)
self.assertEqual(t1 != badarg, True)
self.assertEqual(badarg == t1, False)
self.assertEqual(badarg != t1, True)
self.assertRaises(TypeError, lambda: t1 <= badarg)
self.assertRaises(TypeError, lambda: t1 < badarg)
self.assertRaises(TypeError, lambda: t1 > badarg)
self.assertRaises(TypeError, lambda: t1 >= badarg)
self.assertRaises(TypeError, lambda: badarg <= t1)
self.assertRaises(TypeError, lambda: badarg < t1)
self.assertRaises(TypeError, lambda: badarg > t1)
self.assertRaises(TypeError, lambda: badarg >= t1)
def test_str(self):
td = timedelta
eq = self.assertEqual
eq(str(td(1)), "1 day, 0:00:00")
eq(str(td(-1)), "-1 day, 0:00:00")
eq(str(td(2)), "2 days, 0:00:00")
eq(str(td(-2)), "-2 days, 0:00:00")
eq(str(td(hours=12, minutes=58, seconds=59)), "12:58:59")
eq(str(td(hours=2, minutes=3, seconds=4)), "2:03:04")
eq(str(td(weeks=-30, hours=23, minutes=12, seconds=34)),
"-210 days, 23:12:34")
eq(str(td(milliseconds=1)), "0:00:00.001000")
eq(str(td(microseconds=3)), "0:00:00.000003")
eq(str(td(days=999999999, hours=23, minutes=59, seconds=59,
microseconds=999999)),
"999999999 days, 23:59:59.999999")
def test_repr(self):
name = 'datetime.' + self.theclass.__name__
self.assertEqual(repr(self.theclass(1)),
"%s(days=1)" % name)
self.assertEqual(repr(self.theclass(10, 2)),
"%s(days=10, seconds=2)" % name)
self.assertEqual(repr(self.theclass(-10, 2, 400000)),
"%s(days=-10, seconds=2, microseconds=400000)" % name)
self.assertEqual(repr(self.theclass(seconds=60)),
"%s(seconds=60)" % name)
self.assertEqual(repr(self.theclass()),
"%s(0)" % name)
self.assertEqual(repr(self.theclass(microseconds=100)),
"%s(microseconds=100)" % name)
self.assertEqual(repr(self.theclass(days=1, microseconds=100)),
"%s(days=1, microseconds=100)" % name)
self.assertEqual(repr(self.theclass(seconds=1, microseconds=100)),
"%s(seconds=1, microseconds=100)" % name)
def test_roundtrip(self):
for td in (timedelta(days=999999999, hours=23, minutes=59,
seconds=59, microseconds=999999),
timedelta(days=-999999999),
timedelta(days=-999999999, seconds=1),
timedelta(days=1, seconds=2, microseconds=3)):
# Verify td -> string -> td identity.
s = repr(td)
self.assertTrue(s.startswith('datetime.'))
s = s[9:]
td2 = eval(s)
self.assertEqual(td, td2)
# Verify identity via reconstructing from pieces.
td2 = timedelta(td.days, td.seconds, td.microseconds)
self.assertEqual(td, td2)
def test_resolution_info(self):
self.assertIsInstance(timedelta.min, timedelta)
self.assertIsInstance(timedelta.max, timedelta)
self.assertIsInstance(timedelta.resolution, timedelta)
self.assertTrue(timedelta.max > timedelta.min)
self.assertEqual(timedelta.min, timedelta(-999999999))
self.assertEqual(timedelta.max, timedelta(999999999, 24*3600-1, 1e6-1))
self.assertEqual(timedelta.resolution, timedelta(0, 0, 1))
def test_overflow(self):
tiny = timedelta.resolution
td = timedelta.min + tiny
td -= tiny # no problem
self.assertRaises(OverflowError, td.__sub__, tiny)
self.assertRaises(OverflowError, td.__add__, -tiny)
td = timedelta.max - tiny
td += tiny # no problem
self.assertRaises(OverflowError, td.__add__, tiny)
self.assertRaises(OverflowError, td.__sub__, -tiny)
self.assertRaises(OverflowError, lambda: -timedelta.max)
day = timedelta(1)
self.assertRaises(OverflowError, day.__mul__, 10**9)
self.assertRaises(OverflowError, day.__mul__, 1e9)
self.assertRaises(OverflowError, day.__truediv__, 1e-20)
self.assertRaises(OverflowError, day.__truediv__, 1e-10)
self.assertRaises(OverflowError, day.__truediv__, 9e-10)
@support.requires_IEEE_754
def _test_overflow_special(self):
day = timedelta(1)
self.assertRaises(OverflowError, day.__mul__, INF)
self.assertRaises(OverflowError, day.__mul__, -INF)
def test_microsecond_rounding(self):
td = timedelta
eq = self.assertEqual
# Single-field rounding.
eq(td(milliseconds=0.4/1000), td(0)) # rounds to 0
eq(td(milliseconds=-0.4/1000), td(0)) # rounds to 0
eq(td(milliseconds=0.5/1000), td(microseconds=0))
eq(td(milliseconds=-0.5/1000), td(microseconds=-0))
eq(td(milliseconds=0.6/1000), td(microseconds=1))
eq(td(milliseconds=-0.6/1000), td(microseconds=-1))
eq(td(milliseconds=1.5/1000), td(microseconds=2))
eq(td(milliseconds=-1.5/1000), td(microseconds=-2))
eq(td(seconds=0.5/10**6), td(microseconds=0))
eq(td(seconds=-0.5/10**6), td(microseconds=-0))
eq(td(seconds=1/2**7), td(microseconds=7812))
eq(td(seconds=-1/2**7), td(microseconds=-7812))
# Rounding due to contributions from more than one field.
us_per_hour = 3600e6
us_per_day = us_per_hour * 24
eq(td(days=.4/us_per_day), td(0))
eq(td(hours=.2/us_per_hour), td(0))
eq(td(days=.4/us_per_day, hours=.2/us_per_hour), td(microseconds=1))
eq(td(days=-.4/us_per_day), td(0))
eq(td(hours=-.2/us_per_hour), td(0))
eq(td(days=-.4/us_per_day, hours=-.2/us_per_hour), td(microseconds=-1))
# Test for a patch in Issue 8860
eq(td(microseconds=0.5), 0.5*td(microseconds=1.0))
eq(td(microseconds=0.5)//td.resolution, 0.5*td.resolution//td.resolution)
def test_massive_normalization(self):
td = timedelta(microseconds=-1)
self.assertEqual((td.days, td.seconds, td.microseconds),
(-1, 24*3600-1, 999999))
def test_bool(self):
self.assertTrue(timedelta(1))
self.assertTrue(timedelta(0, 1))
self.assertTrue(timedelta(0, 0, 1))
self.assertTrue(timedelta(microseconds=1))
self.assertFalse(timedelta(0))
def test_subclass_timedelta(self):
class T(timedelta):
@staticmethod
def from_td(td):
return T(td.days, td.seconds, td.microseconds)
def as_hours(self):
sum = (self.days * 24 +
self.seconds / 3600.0 +
self.microseconds / 3600e6)
return round(sum)
t1 = T(days=1)
self.assertIs(type(t1), T)
self.assertEqual(t1.as_hours(), 24)
t2 = T(days=-1, seconds=-3600)
self.assertIs(type(t2), T)
self.assertEqual(t2.as_hours(), -25)
t3 = t1 + t2
self.assertIs(type(t3), timedelta)
t4 = T.from_td(t3)
self.assertIs(type(t4), T)
self.assertEqual(t3.days, t4.days)
self.assertEqual(t3.seconds, t4.seconds)
self.assertEqual(t3.microseconds, t4.microseconds)
self.assertEqual(str(t3), str(t4))
self.assertEqual(t4.as_hours(), -1)
def test_subclass_date(self):
class DateSubclass(date):
pass
d1 = DateSubclass(2018, 1, 5)
td = timedelta(days=1)
tests = [
('add', lambda d, t: d + t, DateSubclass(2018, 1, 6)),
('radd', lambda d, t: t + d, DateSubclass(2018, 1, 6)),
('sub', lambda d, t: d - t, DateSubclass(2018, 1, 4)),
]
for name, func, expected in tests:
with self.subTest(name):
act = func(d1, td)
self.assertEqual(act, expected)
self.assertIsInstance(act, DateSubclass)
def test_subclass_datetime(self):
class DateTimeSubclass(datetime):
pass
d1 = DateTimeSubclass(2018, 1, 5, 12, 30)
td = timedelta(days=1, minutes=30)
tests = [
('add', lambda d, t: d + t, DateTimeSubclass(2018, 1, 6, 13)),
('radd', lambda d, t: t + d, DateTimeSubclass(2018, 1, 6, 13)),
('sub', lambda d, t: d - t, DateTimeSubclass(2018, 1, 4, 12)),
]
for name, func, expected in tests:
with self.subTest(name):
act = func(d1, td)
self.assertEqual(act, expected)
self.assertIsInstance(act, DateTimeSubclass)
def test_division(self):
t = timedelta(hours=1, minutes=24, seconds=19)
second = timedelta(seconds=1)
self.assertEqual(t / second, 5059.0)
self.assertEqual(t // second, 5059)
t = timedelta(minutes=2, seconds=30)
minute = timedelta(minutes=1)
self.assertEqual(t / minute, 2.5)
self.assertEqual(t // minute, 2)
zerotd = timedelta(0)
self.assertRaises(ZeroDivisionError, truediv, t, zerotd)
self.assertRaises(ZeroDivisionError, floordiv, t, zerotd)
# self.assertRaises(TypeError, truediv, t, 2)
# note: floor division of a timedelta by an integer *is*
# currently permitted.
def test_remainder(self):
t = timedelta(minutes=2, seconds=30)
minute = timedelta(minutes=1)
r = t % minute
self.assertEqual(r, timedelta(seconds=30))
t = timedelta(minutes=-2, seconds=30)
r = t % minute
self.assertEqual(r, timedelta(seconds=30))
zerotd = timedelta(0)
self.assertRaises(ZeroDivisionError, mod, t, zerotd)
self.assertRaises(TypeError, mod, t, 10)
def test_divmod(self):
t = timedelta(minutes=2, seconds=30)
minute = timedelta(minutes=1)
q, r = divmod(t, minute)
self.assertEqual(q, 2)
self.assertEqual(r, timedelta(seconds=30))
t = timedelta(minutes=-2, seconds=30)
q, r = divmod(t, minute)
self.assertEqual(q, -2)
self.assertEqual(r, timedelta(seconds=30))
zerotd = timedelta(0)
self.assertRaises(ZeroDivisionError, divmod, t, zerotd)
self.assertRaises(TypeError, divmod, t, 10)
def test_issue31293(self):
# The interpreter shouldn't crash in case a timedelta is divided or
# multiplied by a float with a bad as_integer_ratio() method.
def get_bad_float(bad_ratio):
class BadFloat(float):
def as_integer_ratio(self):
return bad_ratio