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Issue #23517: datetime.timedelta constructor now rounds microseconds to nearest

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with ties going away from zero (ROUND_HALF_UP), as Python 2 and Python older
than 3.3, instead of rounding to nearest with ties going to nearest even
integer (ROUND_HALF_EVEN).
This commit is contained in:
Victor Stinner 2015-09-02 19:16:07 +02:00
parent 8cbb013553
commit 2ec558739e
6 changed files with 26 additions and 34 deletions
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14
Lib/test/datetimetester.py
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@ -662,28 +662,24 @@ class TestTimeDelta(HarmlessMixedComparison, unittest.TestCase):
# 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=0.5/1000), td(microseconds=1))
eq(td(milliseconds=-0.5/1000), td(microseconds=-1))
eq(td(milliseconds=0.6/1000), td(microseconds=1))
eq(td(milliseconds=-0.6/1000), td(microseconds=-1))
eq(td(seconds=0.5/10**6), td(microseconds=0))
eq(td(seconds=-0.5/10**6), td(microseconds=0))
eq(td(seconds=0.5/10**6), td(microseconds=1))
eq(td(seconds=-0.5/10**6), td(microseconds=-1))
# 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, hours=.2/us_per_hour), td(microseconds=1), td)
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),