from __future__ import absolute_import import pickle import datetime from django.test import TestCase from .models import Group, Event, Happening class PickleabilityTestCase(TestCase): def setUp(self): Happening.objects.create() # make sure the defaults are working (#20158) def assert_pickles(self, qs): self.assertEqual(list(pickle.loads(pickle.dumps(qs))), list(qs)) def test_related_field(self): g = Group.objects.create(name="Ponies Who Own Maybachs") self.assert_pickles(Event.objects.filter(group=g.id)) def test_datetime_callable_default_all(self): self.assert_pickles(Happening.objects.all()) def test_datetime_callable_default_filter(self): self.assert_pickles(Happening.objects.filter(when=datetime.datetime.now())) def test_lambda_as_default(self): self.assert_pickles(Happening.objects.filter(name="test")) def test_standalone_method_as_default(self): self.assert_pickles(Happening.objects.filter(number1=1)) def test_staticmethod_as_default(self): self.assert_pickles(Happening.objects.filter(number2=1)) def test_classmethod_as_default(self): self.assert_pickles(Happening.objects.filter(number3=1)) def test_membermethod_as_default(self): self.assert_pickles(Happening.objects.filter(number4=1)) def test_doesnotexist_exception(self): # Ticket #17776 original = Event.DoesNotExist("Doesn't exist") unpickled = pickle.loads(pickle.dumps(original)) # Exceptions are not equal to equivalent instances of themselves, so # can't just use assertEqual(original, unpickled) self.assertEqual(original.__class__, unpickled.__class__) self.assertEqual(original.args, unpickled.args)