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

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).

1 files changed, 5 insertions, 9 deletions

diff --git a/Lib/test/datetimetester.py b/Lib/test/datetimetester.py
index babeb44..62f5527 100644
--- a/Lib/test/datetimetester.py
+++ b/Lib/test/datetimetester.py
@@ -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),