--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/django/contrib/messages/tests/cookie.py	Tue May 25 02:43:45 2010 +0200
@@ -0,0 +1,106 @@
+from django.contrib.messages import constants
+from django.contrib.messages.tests.base import BaseTest
+from django.contrib.messages.storage.cookie import CookieStorage, \
+                                            MessageEncoder, MessageDecoder
+from django.contrib.messages.storage.base import Message
+from django.utils import simplejson as json
+
+
+def set_cookie_data(storage, messages, invalid=False, encode_empty=False):
+    """
+    Sets ``request.COOKIES`` with the encoded data and removes the storage
+    backend's loaded data cache.
+    """
+    encoded_data = storage._encode(messages, encode_empty=encode_empty)
+    if invalid:
+        # Truncate the first character so that the hash is invalid.
+        encoded_data = encoded_data[1:]
+    storage.request.COOKIES = {CookieStorage.cookie_name: encoded_data}
+    if hasattr(storage, '_loaded_data'):
+        del storage._loaded_data
+
+
+def stored_cookie_messages_count(storage, response):
+    """
+    Returns an integer containing the number of messages stored.
+    """
+    # Get a list of cookies, excluding ones with a max-age of 0 (because
+    # they have been marked for deletion).
+    cookie = response.cookies.get(storage.cookie_name)
+    if not cookie or cookie['max-age'] == 0:
+        return 0
+    data = storage._decode(cookie.value)
+    if not data:
+        return 0
+    if data[-1] == CookieStorage.not_finished:
+        data.pop()
+    return len(data)
+
+
+class CookieTest(BaseTest):
+    storage_class = CookieStorage
+
+    def stored_messages_count(self, storage, response):
+        return stored_cookie_messages_count(storage, response)
+
+    def test_get(self):
+        storage = self.storage_class(self.get_request())
+        # Set initial data.
+        example_messages = ['test', 'me']
+        set_cookie_data(storage, example_messages)
+        # Test that the message actually contains what we expect.
+        self.assertEqual(list(storage), example_messages)
+
+    def test_get_bad_cookie(self):
+        request = self.get_request()
+        storage = self.storage_class(request)
+        # Set initial (invalid) data.
+        example_messages = ['test', 'me']
+        set_cookie_data(storage, example_messages, invalid=True)
+        # Test that the message actually contains what we expect.
+        self.assertEqual(list(storage), [])
+
+    def test_max_cookie_length(self):
+        """
+        Tests that, if the data exceeds what is allowed in a cookie, older
+        messages are removed before saving (and returned by the ``update``
+        method).
+        """
+        storage = self.get_storage()
+        response = self.get_response()
+
+        # When storing as a cookie, the cookie has constant overhead of approx
+        # 54 chars, and each message has a constant overhead of about 37 chars
+        # and a variable overhead of zero in the best case. We aim for a message
+        # size which will fit 4 messages into the cookie, but not 5.
+        # See also FallbackTest.test_session_fallback
+        msg_size = int((CookieStorage.max_cookie_size - 54) / 4.5 - 37)
+        for i in range(5):
+            storage.add(constants.INFO, str(i) * msg_size)
+        unstored_messages = storage.update(response)
+
+        cookie_storing = self.stored_messages_count(storage, response)
+        self.assertEqual(cookie_storing, 4)
+
+        self.assertEqual(len(unstored_messages), 1)
+        self.assert_(unstored_messages[0].message == '0' * msg_size)
+
+    def test_json_encoder_decoder(self):
+        """
+        Tests that a complex nested data structure containing Message
+        instances is properly encoded/decoded by the custom JSON
+        encoder/decoder classes.
+        """
+        messages = [
+            {
+                'message': Message(constants.INFO, 'Test message'),
+                'message_list': [Message(constants.INFO, 'message %s') \
+                                 for x in xrange(5)] + [{'another-message': \
+                                 Message(constants.ERROR, 'error')}],
+            },
+            Message(constants.INFO, 'message %s'),
+        ]
+        encoder = MessageEncoder(separators=(',', ':'))
+        value = encoder.encode(messages)
+        decoded_messages = json.loads(value, cls=MessageDecoder)
+        self.assertEqual(messages, decoded_messages)