import pickle

import datetime

from django.test import TestCase

from models import Group, Event, Happening

class PickleabilityTestCase(TestCase):

    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))