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[1.6.x] Added tests for double-pickling a QuerySet

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Refs #21102.

Backpatch of 74b91b3888383fca28dea00e0e1ffb5aecec7c0f
This commit is contained in:
Anssi Kääriäinen 2013-09-14 10:33:12 +03:00
parent 097fb98f81
commit 4c4954a3c1
1 changed files with 12 additions and 0 deletions
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12
tests/queryset_pickle/tests.py
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@ -90,3 +90,15 @@ class PickleabilityTestCase(TestCase):
reloaded = pickle.loads(dumped)
self.assertEqual(original, reloaded)
self.assertIs(reloaded.__class__, dynclass)
def test_pickle_prefetch_related_idempotence(self):
g = Group.objects.create(name='foo')
groups = Group.objects.prefetch_related('event_set')
# First pickling
groups = pickle.loads(pickle.dumps(groups))
self.assertQuerysetEqual(groups, [g], lambda x: x)
# Second pickling
groups = pickle.loads(pickle.dumps(groups))
self.assertQuerysetEqual(groups, [g], lambda x: x)