Made some `contrib.messages` tests use `override_settings` for clarity. Thanks...

from django.contrib.messages.storage.cookie import (CookieStorage,

    MessageEncoder, MessageDecoder)

from django.contrib.messages.storage.base import Message

from django.test.utils import override_settings

from django.utils import simplejson as json

from django.conf import settings

def set_cookie_data(storage, messages, invalid=False, encode_empty=False):

class CookieTest(BaseTest):

    storage_class = CookieStorage

    def setUp(self):

        super(CookieTest, self).setUp()

        self.old_SESSION_COOKIE_DOMAIN = settings.SESSION_COOKIE_DOMAIN

        settings.SESSION_COOKIE_DOMAIN = '.lawrence.com'

    def tearDown(self):

        super(CookieTest, self).tearDown()

        settings.SESSION_COOKIE_DOMAIN = self.old_SESSION_COOKIE_DOMAIN

    def stored_messages_count(self, storage, response):

        return stored_cookie_messages_count(storage, response)

        value = encoder.encode(messages)

        decoded_messages = json.loads(value, cls=MessageDecoder)

        self.assertEqual(messages, decoded_messages)

CookieTest = override_settings(

        SESSION_COOKIE_DOMAIN='.lawrence.com')(CookieTest)