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Fixed #24793 -- Unified temporal difference support.

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This commit is contained in:
Simon Charette 2016-01-19 20:43:41 -05:00
parent 31098e3288
commit 766afc22a1
14 changed files with 135 additions and 2 deletions
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36
tests/expressions/tests.py
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@ -870,8 +870,42 @@ class FTimeDeltaTests(TestCase):
Experiment.objects.filter(end__gte=F('start') + F('estimated_time') + datetime.timedelta(hours=1))]
self.assertEqual(delta_math, ['e4'])
@skipUnlessDBFeature("has_native_duration_field")
@skipUnlessDBFeature('supports_temporal_subtraction')
def test_date_subtraction(self):
queryset = Experiment.objects.annotate(
completion_duration=ExpressionWrapper(
F('completed') - F('assigned'), output_field=models.DurationField()
)
)
at_least_5_days = {e.name for e in queryset.filter(completion_duration__gte=datetime.timedelta(days=5))}
self.assertEqual(at_least_5_days, {'e3', 'e4'})
less_than_5_days = {e.name for e in queryset.filter(completion_duration__lt=datetime.timedelta(days=5))}
expected = {'e0', 'e2'}
if connection.features.supports_microsecond_precision:
expected.add('e1')
self.assertEqual(less_than_5_days, expected)
@skipUnlessDBFeature('supports_temporal_subtraction')
def test_time_subtraction(self):
if connection.features.supports_microsecond_precision:
time = datetime.time(12, 30, 15, 2345)
timedelta = datetime.timedelta(hours=1, minutes=15, seconds=15, microseconds=2345)
else:
time = datetime.time(12, 30, 15)
timedelta = datetime.timedelta(hours=1, minutes=15, seconds=15)
Time.objects.create(time=time)
queryset = Time.objects.annotate(
difference=ExpressionWrapper(
F('time') - Value(datetime.time(11, 15, 0), output_field=models.TimeField()),
output_field=models.DurationField(),
)
)
self.assertEqual(queryset.get().difference, timedelta)
@skipUnlessDBFeature('supports_temporal_subtraction')
def test_datetime_subtraction(self):
under_estimate = [e.name for e in
Experiment.objects.filter(estimated_time__gt=F('end') - F('start'))]
self.assertEqual(under_estimate, ['e2'])