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SF bug #1028306: date-datetime comparison

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Treat comparing a date to a datetime like a mixed-type comparison.
This commit is contained in:
Tim Peters 2004-09-16 01:30:50 +00:00
parent c74298a72b
commit 528ca53b74
3 changed files with 64 additions and 1 deletions
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43
Lib/test/test_datetime.py
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@ -3151,6 +3151,48 @@ def fromutc(self, dt):
fstart += HOUR
#############################################################################
# oddballs
class Oddballs(unittest.TestCase):
def test_bug_1028306(self):
# Trying to compare a date to a datetime should act like a mixed-
# type comparison, despite that datetime is a subclass of date.
as_date = date.today()
as_datetime = datetime.combine(as_date, time())
self.assert_(as_date != as_datetime)
self.assert_(as_datetime != as_date)
self.assert_(not as_date == as_datetime)
self.assert_(not as_datetime == as_date)
self.assertRaises(TypeError, lambda: as_date < as_datetime)
self.assertRaises(TypeError, lambda: as_datetime < as_date)
self.assertRaises(TypeError, lambda: as_date <= as_datetime)
self.assertRaises(TypeError, lambda: as_datetime <= as_date)
self.assertRaises(TypeError, lambda: as_date > as_datetime)
self.assertRaises(TypeError, lambda: as_datetime > as_date)
self.assertRaises(TypeError, lambda: as_date >= as_datetime)
self.assertRaises(TypeError, lambda: as_datetime >= as_date)
# Neverthelss, comparison should work with the base-class (date)
# projection if use of a date method is forced.
self.assert_(as_date.__eq__(as_datetime))
different_day = (as_date.day + 1) % 20 + 1
self.assert_(not as_date.__eq__(as_datetime.replace(day=
different_day)))
# And date should compare with other subclasses of date. If a
# subclass wants to stop this, it's up to the subclass to do so.
date_sc = SubclassDate(as_date.year, as_date.month, as_date.day)
self.assertEqual(as_date, date_sc)
self.assertEqual(date_sc, as_date)
# Ditto for datetimes.
datetime_sc = SubclassDatetime(as_datetime.year, as_datetime.month,
as_date.day, 0, 0, 0)
self.assertEqual(as_datetime, datetime_sc)
self.assertEqual(datetime_sc, as_datetime)
def test_suite():
allsuites = [unittest.makeSuite(klass, 'test')
for klass in (TestModule,
@ -3163,6 +3205,7 @@ def test_suite():
TestTimeTZ,
TestDateTimeTZ,
TestTimezoneConversions,
Oddballs,
)
]
return unittest.TestSuite(allsuites)