import warnings from django import http from django.test import TestCase from django.conf import settings from django.utils.translation import ugettext_lazy from django.utils.unittest import skipIf from django.contrib.messages import constants, utils, get_level, set_level from django.contrib.messages.api import MessageFailure from django.contrib.messages.storage import default_storage, base from django.contrib.messages.storage.base import Message from django.core.urlresolvers import reverse from django.contrib.auth.models import User def skipUnlessAuthIsInstalled(func): return skipIf( 'django.contrib.auth' not in settings.INSTALLED_APPS, "django.contrib.auth isn't installed")(func) def add_level_messages(storage): """ Adds 6 messages from different levels (including a custom one) to a storage instance. """ storage.add(constants.INFO, 'A generic info message') storage.add(29, 'Some custom level') storage.add(constants.DEBUG, 'A debugging message', extra_tags='extra-tag') storage.add(constants.WARNING, 'A warning') storage.add(constants.ERROR, 'An error') storage.add(constants.SUCCESS, 'This was a triumph.') class BaseTest(TestCase): storage_class = default_storage restore_settings = ['MESSAGE_LEVEL', 'MESSAGE_TAGS'] urls = 'django.contrib.messages.tests.urls' levels = { 'debug': constants.DEBUG, 'info': constants.INFO, 'success': constants.SUCCESS, 'warning': constants.WARNING, 'error': constants.ERROR, } def setUp(self): self._remembered_settings = {} for setting in self.restore_settings: if hasattr(settings, setting): self._remembered_settings[setting] = getattr(settings, setting) delattr(settings._wrapped, setting) # Backup these manually because we do not want them deleted. self._middleware_classes = settings.MIDDLEWARE_CLASSES self._template_context_processors = \ settings.TEMPLATE_CONTEXT_PROCESSORS self._installed_apps = settings.INSTALLED_APPS self._message_storage = settings.MESSAGE_STORAGE settings.MESSAGE_STORAGE = '%s.%s' % (self.storage_class.__module__, self.storage_class.__name__) self.old_TEMPLATE_DIRS = settings.TEMPLATE_DIRS settings.TEMPLATE_DIRS = () self.save_warnings_state() warnings.filterwarnings('ignore', category=DeprecationWarning, module='django.contrib.auth.models') def tearDown(self): for setting in self.restore_settings: self.restore_setting(setting) # Restore these manually (see above). settings.MIDDLEWARE_CLASSES = self._middleware_classes settings.TEMPLATE_CONTEXT_PROCESSORS = \ self._template_context_processors settings.INSTALLED_APPS = self._installed_apps settings.MESSAGE_STORAGE = self._message_storage settings.TEMPLATE_DIRS = self.old_TEMPLATE_DIRS self.restore_warnings_state() def restore_setting(self, setting): if setting in self._remembered_settings: value = self._remembered_settings.pop(setting) setattr(settings, setting, value) elif hasattr(settings, setting): delattr(settings._wrapped, setting) def get_request(self): return http.HttpRequest() def get_response(self): return http.HttpResponse() def get_storage(self, data=None): """ Returns the storage backend, setting its loaded data to the ``data`` argument. This method avoids the storage ``_get`` method from getting called so that other parts of the storage backend can be tested independent of the message retrieval logic. """ storage = self.storage_class(self.get_request()) storage._loaded_data = data or [] return storage def test_add(self): storage = self.get_storage() self.assertFalse(storage.added_new) storage.add(constants.INFO, 'Test message 1') self.assertTrue(storage.added_new) storage.add(constants.INFO, 'Test message 2', extra_tags='tag') self.assertEqual(len(storage), 2) def test_add_lazy_translation(self): storage = self.get_storage() response = self.get_response() storage.add(constants.INFO, ugettext_lazy('lazy message')) storage.update(response) storing = self.stored_messages_count(storage, response) self.assertEqual(storing, 1) def test_no_update(self): storage = self.get_storage() response = self.get_response() storage.update(response) storing = self.stored_messages_count(storage, response) self.assertEqual(storing, 0) def test_add_update(self): storage = self.get_storage() response = self.get_response() storage.add(constants.INFO, 'Test message 1') storage.add(constants.INFO, 'Test message 1', extra_tags='tag') storage.update(response) storing = self.stored_messages_count(storage, response) self.assertEqual(storing, 2) def test_existing_add_read_update(self): storage = self.get_existing_storage() response = self.get_response() storage.add(constants.INFO, 'Test message 3') list(storage) # Simulates a read storage.update(response) storing = self.stored_messages_count(storage, response) self.assertEqual(storing, 0) def test_existing_read_add_update(self): storage = self.get_existing_storage() response = self.get_response() list(storage) # Simulates a read storage.add(constants.INFO, 'Test message 3') storage.update(response) storing = self.stored_messages_count(storage, response) self.assertEqual(storing, 1) def test_full_request_response_cycle(self): """ With the message middleware enabled, tests that messages are properly stored and then retrieved across the full request/redirect/response cycle. """ settings.MESSAGE_LEVEL = constants.DEBUG data = { 'messages': ['Test message %d' % x for x in xrange(10)], } show_url = reverse('django.contrib.messages.tests.urls.show') for level in ('debug', 'info', 'success', 'warning', 'error'): add_url = reverse('django.contrib.messages.tests.urls.add', args=(level,)) response = self.client.post(add_url, data, follow=True) self.assertRedirects(response, show_url) self.assertTrue('messages' in response.context) messages = [Message(self.levels[level], msg) for msg in data['messages']] self.assertEqual(list(response.context['messages']), messages) for msg in data['messages']: self.assertContains(response, msg) def test_with_template_response(self): settings.MESSAGE_LEVEL = constants.DEBUG data = { 'messages': ['Test message %d' % x for x in xrange(10)], } show_url = reverse('django.contrib.messages.tests.urls.show_template_response') for level in self.levels.keys(): add_url = reverse('django.contrib.messages.tests.urls.add_template_response', args=(level,)) response = self.client.post(add_url, data, follow=True) self.assertRedirects(response, show_url) self.assertTrue('messages' in response.context) for msg in data['messages']: self.assertContains(response, msg) # there shouldn't be any messages on second GET request response = self.client.get(show_url) for msg in data['messages']: self.assertNotContains(response, msg) def test_multiple_posts(self): """ Tests that messages persist properly when multiple POSTs are made before a GET. """ settings.MESSAGE_LEVEL = constants.DEBUG data = { 'messages': ['Test message %d' % x for x in xrange(10)], } show_url = reverse('django.contrib.messages.tests.urls.show') messages = [] for level in ('debug', 'info', 'success', 'warning', 'error'): messages.extend([Message(self.levels[level], msg) for msg in data['messages']]) add_url = reverse('django.contrib.messages.tests.urls.add', args=(level,)) self.client.post(add_url, data) response = self.client.get(show_url) self.assertTrue('messages' in response.context) self.assertEqual(list(response.context['messages']), messages) for msg in data['messages']: self.assertContains(response, msg) @skipUnlessAuthIsInstalled def test_middleware_disabled_auth_user(self): """ Tests that the messages API successfully falls back to using user.message_set to store messages directly when the middleware is disabled. """ settings.MESSAGE_LEVEL = constants.DEBUG user = User.objects.create_user('test', 'test@example.com', 'test') self.client.login(username='test', password='test') settings.INSTALLED_APPS = list(settings.INSTALLED_APPS) settings.INSTALLED_APPS.remove( 'django.contrib.messages', ) settings.MIDDLEWARE_CLASSES = list(settings.MIDDLEWARE_CLASSES) settings.MIDDLEWARE_CLASSES.remove( 'django.contrib.messages.middleware.MessageMiddleware', ) settings.TEMPLATE_CONTEXT_PROCESSORS = \ list(settings.TEMPLATE_CONTEXT_PROCESSORS) settings.TEMPLATE_CONTEXT_PROCESSORS.remove( 'django.contrib.messages.context_processors.messages', ) data = { 'messages': ['Test message %d' % x for x in xrange(10)], } show_url = reverse('django.contrib.messages.tests.urls.show') for level in ('debug', 'info', 'success', 'warning', 'error'): add_url = reverse('django.contrib.messages.tests.urls.add', args=(level,)) response = self.client.post(add_url, data, follow=True) self.assertRedirects(response, show_url) self.assertTrue('messages' in response.context) context_messages = list(response.context['messages']) for msg in data['messages']: self.assertTrue(msg in context_messages) self.assertContains(response, msg) def test_middleware_disabled_anon_user(self): """ Tests that, when the middleware is disabled and a user is not logged in, an exception is raised when one attempts to store a message. """ settings.MESSAGE_LEVEL = constants.DEBUG settings.INSTALLED_APPS = list(settings.INSTALLED_APPS) settings.INSTALLED_APPS.remove( 'django.contrib.messages', ) settings.MIDDLEWARE_CLASSES = list(settings.MIDDLEWARE_CLASSES) settings.MIDDLEWARE_CLASSES.remove( 'django.contrib.messages.middleware.MessageMiddleware', ) settings.TEMPLATE_CONTEXT_PROCESSORS = \ list(settings.TEMPLATE_CONTEXT_PROCESSORS) settings.TEMPLATE_CONTEXT_PROCESSORS.remove( 'django.contrib.messages.context_processors.messages', ) data = { 'messages': ['Test message %d' % x for x in xrange(10)], } show_url = reverse('django.contrib.messages.tests.urls.show') for level in ('debug', 'info', 'success', 'warning', 'error'): add_url = reverse('django.contrib.messages.tests.urls.add', args=(level,)) self.assertRaises(MessageFailure, self.client.post, add_url, data, follow=True) def test_middleware_disabled_anon_user_fail_silently(self): """ Tests that, when the middleware is disabled and a user is not logged in, an exception is not raised if 'fail_silently' = True """ settings.MESSAGE_LEVEL = constants.DEBUG settings.INSTALLED_APPS = list(settings.INSTALLED_APPS) settings.INSTALLED_APPS.remove( 'django.contrib.messages', ) settings.MIDDLEWARE_CLASSES = list(settings.MIDDLEWARE_CLASSES) settings.MIDDLEWARE_CLASSES.remove( 'django.contrib.messages.middleware.MessageMiddleware', ) settings.TEMPLATE_CONTEXT_PROCESSORS = \ list(settings.TEMPLATE_CONTEXT_PROCESSORS) settings.TEMPLATE_CONTEXT_PROCESSORS.remove( 'django.contrib.messages.context_processors.messages', ) data = { 'messages': ['Test message %d' % x for x in xrange(10)], 'fail_silently': True, } show_url = reverse('django.contrib.messages.tests.urls.show') for level in ('debug', 'info', 'success', 'warning', 'error'): add_url = reverse('django.contrib.messages.tests.urls.add', args=(level,)) response = self.client.post(add_url, data, follow=True) self.assertRedirects(response, show_url) self.assertTrue('messages' in response.context) self.assertEqual(list(response.context['messages']), []) def stored_messages_count(self, storage, response): """ Returns the number of messages being stored after a ``storage.update()`` call. """ raise NotImplementedError('This method must be set by a subclass.') def test_get(self): raise NotImplementedError('This method must be set by a subclass.') def get_existing_storage(self): return self.get_storage([Message(constants.INFO, 'Test message 1'), Message(constants.INFO, 'Test message 2', extra_tags='tag')]) def test_existing_read(self): """ Tests that reading the existing storage doesn't cause the data to be lost. """ storage = self.get_existing_storage() self.assertFalse(storage.used) # After iterating the storage engine directly, the used flag is set. data = list(storage) self.assert_(storage.used) # The data does not disappear because it has been iterated. self.assertEqual(data, list(storage)) def test_existing_add(self): storage = self.get_existing_storage() self.assertFalse(storage.added_new) storage.add(constants.INFO, 'Test message 3') self.assert_(storage.added_new) def test_default_level(self): # get_level works even with no storage on the request. request = self.get_request() self.assertEqual(get_level(request), constants.INFO) # get_level returns the default level if it hasn't been set. storage = self.get_storage() request._messages = storage self.assertEqual(get_level(request), constants.INFO) # Only messages of sufficient level get recorded. add_level_messages(storage) self.assertEqual(len(storage), 5) def test_low_level(self): request = self.get_request() storage = self.storage_class(request) request._messages = storage self.assert_(set_level(request, 5)) self.assertEqual(get_level(request), 5) add_level_messages(storage) self.assertEqual(len(storage), 6) def test_high_level(self): request = self.get_request() storage = self.storage_class(request) request._messages = storage self.assert_(set_level(request, 30)) self.assertEqual(get_level(request), 30) add_level_messages(storage) self.assertEqual(len(storage), 2) def test_settings_level(self): request = self.get_request() storage = self.storage_class(request) settings.MESSAGE_LEVEL = 29 self.assertEqual(get_level(request), 29) add_level_messages(storage) self.assertEqual(len(storage), 3) def test_tags(self): storage = self.get_storage() storage.level = 0 add_level_messages(storage) tags = [msg.tags for msg in storage] self.assertEqual(tags, ['info', '', 'extra-tag debug', 'warning', 'error', 'success']) def test_custom_tags(self): settings.MESSAGE_TAGS = { constants.INFO: 'info', constants.DEBUG: '', constants.WARNING: '', constants.ERROR: 'bad', 29: 'custom', } # LEVEL_TAGS is a constant defined in the # django.contrib.messages.storage.base module, so after changing # settings.MESSAGE_TAGS, we need to update that constant too. base.LEVEL_TAGS = utils.get_level_tags() try: storage = self.get_storage() storage.level = 0 add_level_messages(storage) tags = [msg.tags for msg in storage] self.assertEqual(tags, ['info', 'custom', 'extra-tag', '', 'bad', 'success']) finally: # Ensure the level tags constant is put back like we found it. self.restore_setting('MESSAGE_TAGS') base.LEVEL_TAGS = utils.get_level_tags()