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Issue #23517: Fix implementation of the ROUND_HALF_UP rounding mode in

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datetime.datetime.fromtimestamp() and datetime.datetime.utcfromtimestamp().
microseconds sign should be kept before rounding.
This commit is contained in:
Victor Stinner 2015-09-04 23:57:25 +02:00
parent 19bbb9af67
commit adfefa527a
4 changed files with 43 additions and 40 deletions
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12
Lib/test/datetimetester.py
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@ -668,6 +668,8 @@ def test_microsecond_rounding(self):
eq(td(milliseconds=-0.6/1000), td(microseconds=-1))
eq(td(seconds=0.5/10**6), td(microseconds=1))
eq(td(seconds=-0.5/10**6), td(microseconds=-1))
eq(td(seconds=1/2**7), td(microseconds=7813))
eq(td(seconds=-1/2**7), td(microseconds=-7813))
# Rounding due to contributions from more than one field.
us_per_hour = 3600e6
@ -1842,8 +1844,8 @@ def test_timestamp_aware(self):
18000 + 3600 + 2*60 + 3 + 4*1e-6)
def test_microsecond_rounding(self):
for fts in [self.theclass.fromtimestamp,
self.theclass.utcfromtimestamp]:
for fts in (datetime.fromtimestamp,
self.theclass.utcfromtimestamp):
zero = fts(0)
self.assertEqual(zero.second, 0)
self.assertEqual(zero.microsecond, 0)
@ -1874,6 +1876,12 @@ def test_microsecond_rounding(self):
t = fts(0.9999999)
self.assertEqual(t.second, 1)
self.assertEqual(t.microsecond, 0)
t = fts(1/2**7)
self.assertEqual(t.second, 0)
self.assertEqual(t.microsecond, 7813)
t = fts(-1/2**7)
self.assertEqual(t.second, 59)
self.assertEqual(t.microsecond, 992187)
def test_insane_fromtimestamp(self):
# It's possible that some platform maps time_t to double,