376 lines
14 KiB
Python
376 lines
14 KiB
Python
from django.contrib.messages import constants, get_level, set_level, utils
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from django.contrib.messages.api import MessageFailure
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from django.contrib.messages.constants import DEFAULT_LEVELS
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from django.contrib.messages.storage import base, default_storage
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from django.contrib.messages.storage.base import Message
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from django.http import HttpRequest, HttpResponse
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from django.test import modify_settings, override_settings
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from django.urls import reverse
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from django.utils.translation import gettext_lazy
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def add_level_messages(storage):
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"""
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Add 6 messages from different levels (including a custom one) to a storage
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instance.
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"""
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storage.add(constants.INFO, 'A generic info message')
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storage.add(29, 'Some custom level')
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storage.add(constants.DEBUG, 'A debugging message', extra_tags='extra-tag')
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storage.add(constants.WARNING, 'A warning')
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storage.add(constants.ERROR, 'An error')
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storage.add(constants.SUCCESS, 'This was a triumph.')
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class override_settings_tags(override_settings):
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def enable(self):
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super().enable()
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# LEVEL_TAGS is a constant defined in the
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# django.contrib.messages.storage.base module, so after changing
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# settings.MESSAGE_TAGS, update that constant also.
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self.old_level_tags = base.LEVEL_TAGS
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base.LEVEL_TAGS = utils.get_level_tags()
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def disable(self):
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super().disable()
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base.LEVEL_TAGS = self.old_level_tags
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class BaseTests:
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storage_class = default_storage
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levels = {
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'debug': constants.DEBUG,
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'info': constants.INFO,
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'success': constants.SUCCESS,
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'warning': constants.WARNING,
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'error': constants.ERROR,
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}
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def setUp(self):
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self.settings_override = override_settings_tags(
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TEMPLATES=[{
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'BACKEND': 'django.template.backends.django.DjangoTemplates',
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'DIRS': [],
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'APP_DIRS': True,
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'OPTIONS': {
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'context_processors': (
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'django.contrib.auth.context_processors.auth',
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'django.contrib.messages.context_processors.messages',
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),
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},
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}],
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ROOT_URLCONF='messages_tests.urls',
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MESSAGE_TAGS='',
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MESSAGE_STORAGE='%s.%s' % (self.storage_class.__module__, self.storage_class.__name__),
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SESSION_SERIALIZER='django.contrib.sessions.serializers.JSONSerializer',
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)
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self.settings_override.enable()
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def tearDown(self):
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self.settings_override.disable()
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def get_request(self):
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return HttpRequest()
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def get_response(self):
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return HttpResponse()
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def get_storage(self, data=None):
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"""
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Return the storage backend, setting its loaded data to the ``data``
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argument.
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This method avoids the storage ``_get`` method from getting called so
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that other parts of the storage backend can be tested independent of
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the message retrieval logic.
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"""
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storage = self.storage_class(self.get_request())
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storage._loaded_data = data or []
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return storage
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def test_add(self):
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storage = self.get_storage()
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self.assertFalse(storage.added_new)
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storage.add(constants.INFO, 'Test message 1')
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self.assertTrue(storage.added_new)
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storage.add(constants.INFO, 'Test message 2', extra_tags='tag')
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self.assertEqual(len(storage), 2)
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def test_add_lazy_translation(self):
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storage = self.get_storage()
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response = self.get_response()
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storage.add(constants.INFO, gettext_lazy('lazy message'))
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storage.update(response)
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storing = self.stored_messages_count(storage, response)
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self.assertEqual(storing, 1)
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def test_no_update(self):
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storage = self.get_storage()
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response = self.get_response()
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storage.update(response)
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storing = self.stored_messages_count(storage, response)
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self.assertEqual(storing, 0)
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def test_add_update(self):
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storage = self.get_storage()
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response = self.get_response()
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storage.add(constants.INFO, 'Test message 1')
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storage.add(constants.INFO, 'Test message 1', extra_tags='tag')
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storage.update(response)
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storing = self.stored_messages_count(storage, response)
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self.assertEqual(storing, 2)
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def test_existing_add_read_update(self):
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storage = self.get_existing_storage()
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response = self.get_response()
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storage.add(constants.INFO, 'Test message 3')
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list(storage) # Simulates a read
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storage.update(response)
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storing = self.stored_messages_count(storage, response)
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self.assertEqual(storing, 0)
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def test_existing_read_add_update(self):
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storage = self.get_existing_storage()
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response = self.get_response()
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list(storage) # Simulates a read
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storage.add(constants.INFO, 'Test message 3')
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storage.update(response)
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storing = self.stored_messages_count(storage, response)
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self.assertEqual(storing, 1)
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@override_settings(MESSAGE_LEVEL=constants.DEBUG)
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def test_full_request_response_cycle(self):
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"""
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With the message middleware enabled, messages are properly stored and
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retrieved across the full request/redirect/response cycle.
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"""
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data = {
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'messages': ['Test message %d' % x for x in range(5)],
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}
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show_url = reverse('show_message')
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for level in ('debug', 'info', 'success', 'warning', 'error'):
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add_url = reverse('add_message', args=(level,))
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response = self.client.post(add_url, data, follow=True)
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self.assertRedirects(response, show_url)
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self.assertIn('messages', response.context)
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messages = [Message(self.levels[level], msg) for msg in data['messages']]
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self.assertEqual(list(response.context['messages']), messages)
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for msg in data['messages']:
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self.assertContains(response, msg)
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@override_settings(MESSAGE_LEVEL=constants.DEBUG)
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def test_with_template_response(self):
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data = {
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'messages': ['Test message %d' % x for x in range(5)],
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}
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show_url = reverse('show_template_response')
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for level in self.levels.keys():
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add_url = reverse('add_template_response', args=(level,))
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response = self.client.post(add_url, data, follow=True)
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self.assertRedirects(response, show_url)
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self.assertIn('messages', response.context)
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for msg in data['messages']:
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self.assertContains(response, msg)
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# there shouldn't be any messages on second GET request
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response = self.client.get(show_url)
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for msg in data['messages']:
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self.assertNotContains(response, msg)
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def test_context_processor_message_levels(self):
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show_url = reverse('show_template_response')
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response = self.client.get(show_url)
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self.assertIn('DEFAULT_MESSAGE_LEVELS', response.context)
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self.assertEqual(response.context['DEFAULT_MESSAGE_LEVELS'], DEFAULT_LEVELS)
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@override_settings(MESSAGE_LEVEL=constants.DEBUG)
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def test_multiple_posts(self):
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"""
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Messages persist properly when multiple POSTs are made before a GET.
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"""
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data = {
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'messages': ['Test message %d' % x for x in range(5)],
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}
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show_url = reverse('show_message')
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messages = []
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for level in ('debug', 'info', 'success', 'warning', 'error'):
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messages.extend(Message(self.levels[level], msg) for msg in data['messages'])
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add_url = reverse('add_message', args=(level,))
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self.client.post(add_url, data)
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response = self.client.get(show_url)
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self.assertIn('messages', response.context)
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self.assertEqual(list(response.context['messages']), messages)
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for msg in data['messages']:
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self.assertContains(response, msg)
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@modify_settings(
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INSTALLED_APPS={'remove': 'django.contrib.messages'},
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MIDDLEWARE={'remove': 'django.contrib.messages.middleware.MessageMiddleware'},
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)
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@override_settings(
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MESSAGE_LEVEL=constants.DEBUG,
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TEMPLATES=[{
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'BACKEND': 'django.template.backends.django.DjangoTemplates',
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'DIRS': [],
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'APP_DIRS': True,
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}],
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)
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def test_middleware_disabled(self):
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"""
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When the middleware is disabled, an exception is raised when one
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attempts to store a message.
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"""
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data = {
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'messages': ['Test message %d' % x for x in range(5)],
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}
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reverse('show_message')
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for level in ('debug', 'info', 'success', 'warning', 'error'):
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add_url = reverse('add_message', args=(level,))
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with self.assertRaises(MessageFailure):
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self.client.post(add_url, data, follow=True)
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@modify_settings(
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INSTALLED_APPS={'remove': 'django.contrib.messages'},
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MIDDLEWARE={'remove': 'django.contrib.messages.middleware.MessageMiddleware'},
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)
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@override_settings(
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TEMPLATES=[{
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'BACKEND': 'django.template.backends.django.DjangoTemplates',
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'DIRS': [],
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'APP_DIRS': True,
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}],
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)
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def test_middleware_disabled_fail_silently(self):
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"""
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When the middleware is disabled, an exception is not raised
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if 'fail_silently' = True
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"""
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data = {
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'messages': ['Test message %d' % x for x in range(5)],
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'fail_silently': True,
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}
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show_url = reverse('show_message')
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for level in ('debug', 'info', 'success', 'warning', 'error'):
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add_url = reverse('add_message', args=(level,))
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response = self.client.post(add_url, data, follow=True)
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self.assertRedirects(response, show_url)
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self.assertNotIn('messages', response.context)
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def stored_messages_count(self, storage, response):
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"""
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Return the number of messages being stored after a
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``storage.update()`` call.
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"""
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raise NotImplementedError('This method must be set by a subclass.')
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def test_get(self):
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raise NotImplementedError('This method must be set by a subclass.')
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def get_existing_storage(self):
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return self.get_storage([
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Message(constants.INFO, 'Test message 1'),
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Message(constants.INFO, 'Test message 2', extra_tags='tag'),
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])
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def test_existing_read(self):
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"""
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Reading the existing storage doesn't cause the data to be lost.
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"""
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storage = self.get_existing_storage()
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self.assertFalse(storage.used)
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# After iterating the storage engine directly, the used flag is set.
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data = list(storage)
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self.assertTrue(storage.used)
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# The data does not disappear because it has been iterated.
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self.assertEqual(data, list(storage))
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def test_existing_add(self):
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storage = self.get_existing_storage()
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self.assertFalse(storage.added_new)
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storage.add(constants.INFO, 'Test message 3')
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self.assertTrue(storage.added_new)
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def test_default_level(self):
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# get_level works even with no storage on the request.
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request = self.get_request()
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self.assertEqual(get_level(request), constants.INFO)
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# get_level returns the default level if it hasn't been set.
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storage = self.get_storage()
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request._messages = storage
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self.assertEqual(get_level(request), constants.INFO)
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# Only messages of sufficient level get recorded.
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add_level_messages(storage)
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self.assertEqual(len(storage), 5)
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def test_low_level(self):
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request = self.get_request()
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storage = self.storage_class(request)
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request._messages = storage
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self.assertTrue(set_level(request, 5))
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self.assertEqual(get_level(request), 5)
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add_level_messages(storage)
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self.assertEqual(len(storage), 6)
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def test_high_level(self):
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request = self.get_request()
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storage = self.storage_class(request)
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request._messages = storage
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self.assertTrue(set_level(request, 30))
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self.assertEqual(get_level(request), 30)
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add_level_messages(storage)
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self.assertEqual(len(storage), 2)
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@override_settings(MESSAGE_LEVEL=29)
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def test_settings_level(self):
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request = self.get_request()
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storage = self.storage_class(request)
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self.assertEqual(get_level(request), 29)
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add_level_messages(storage)
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self.assertEqual(len(storage), 3)
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def test_tags(self):
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storage = self.get_storage()
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storage.level = 0
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add_level_messages(storage)
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storage.add(constants.INFO, 'A generic info message', extra_tags=None)
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tags = [msg.tags for msg in storage]
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self.assertEqual(tags, ['info', '', 'extra-tag debug', 'warning', 'error', 'success', 'info'])
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def test_level_tag(self):
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storage = self.get_storage()
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storage.level = 0
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add_level_messages(storage)
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tags = [msg.level_tag for msg in storage]
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self.assertEqual(tags, ['info', '', 'debug', 'warning', 'error', 'success'])
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@override_settings_tags(MESSAGE_TAGS={
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constants.INFO: 'info',
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constants.DEBUG: '',
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constants.WARNING: '',
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constants.ERROR: 'bad',
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29: 'custom',
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})
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def test_custom_tags(self):
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storage = self.get_storage()
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storage.level = 0
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add_level_messages(storage)
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tags = [msg.tags for msg in storage]
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self.assertEqual(tags, ['info', 'custom', 'extra-tag', '', 'bad', 'success'])
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