Как протестировать 500.html в (django) development env?

Ответ 1

Я предпочитаю не отключать DEBUG. Вместо этого я поместил следующий фрагмент в urls.py:

if settings.DEBUG:
    urlpatterns += patterns('',
        (r'^500/$', 'your_custom_view_if_you_wrote_one'),
        (r'^404/$', 'django.views.generic.simple.direct_to_template', {'template': '404.html'}),
    )

В приведенном выше фрагменте страницы с ошибкой используется пользовательское представление, вы можете легко заменить его на представление Django direct_to_template.

Теперь вы можете проверить 500 и 404 страницы, называя их URL: http://example.com/500 и http://example.com/404

Ответ 2

В Django 1.6 django.views.generic.simple.direct_to_template больше не существует, это мои настройки для специальных просмотров:

# urls.py

from django.views.generic import TemplateView
from django.views.defaults import page_not_found, server_error

urlpatterns += [
    url(r'^400/$', TemplateView.as_view(template_name='400.html')),
    url(r'^403/$', TemplateView.as_view(template_name='403.html')),
    url(r'^404/$', page_not_found),
    url(r'^500/$', server_error),
]

Ответ 3

И если вы хотите использовать представление Django 500 по умолчанию вместо своего пользовательского представления:

if settings.DEBUG:
    urlpatterns += patterns('',
        (r'^500/$', 'django.views.defaults.server_error'),
        (r'^404/$', 'django.views.generic.simple.direct_to_template', {'template': '404.html'}),
    )

Ответ 4

Продолжение shanyu answer, в Django 1.3+ используйте:

if settings.DEBUG:
    urlpatterns += patterns('',
        (r'^500/$', 'django.views.defaults.server_error'),
        (r'^404/$', 'django.views.defaults.page_not_found'),
    )

Ответ 5

Являются ли оба параметра отладки ложными?

settings.DEBUG = False
settings.TEMPLATE_DEBUG = False

Ответ 6

urls.py

handler500 = 'project.apps.core.views.handler500'
handler404 = 'project.apps.core.views.handler404'

views.py

from django.template.loader import get_template
from django.template import Context
from django.http import HttpResponseServerError, HttpResponseNotFound


def handler500(request, template_name='500.html'):
    t = get_template(template_name)
    ctx = Context({})
    return HttpResponseServerError(t.render(ctx))


def handler404(request, template_name='404.html'):
    t = get_template(template_name)
    ctx = Context({})
    return HttpResponseNotFound(t.render(ctx))

tests.py

from django.test import TestCase
from django.test.client import RequestFactory

from project import urls

from ..views import handler404, handler500


class TestErrorPages(TestCase):

    def test_error_handlers(self):
        self.assertTrue(urls.handler404.endswith('.handler404'))
        self.assertTrue(urls.handler500.endswith('.handler500'))
        factory = RequestFactory()
        request = factory.get('/')
        response = handler404(request)
        self.assertEqual(response.status_code, 404)
        self.assertIn('404 Not Found!!', unicode(response))
        response = handler500(request)
        self.assertEqual(response.status_code, 500)
        self.assertIn('500 Internal Server Error', unicode(response))

Ответ 7

Как я это делаю и проверяю пользовательские обработчики ошибок

Определите пользовательский View на основе TemplateView

# views.py
from django.views.generic import TemplateView

class ErrorHandler(TemplateView):

    """ Render error template """

    error_code = 404
    template_name = 'index/error.html'

    def dispatch(self, request, *args, **kwargs):
        """ For error on any methods return just GET """
        return self.get(request, *args, **kwargs)

    def get_context_data(self, **kwargs):
        context = super().get_context_data(**kwargs)
        context['error_code'] = self.error_code
        return context

    def render_to_response(self, context, **response_kwargs):
        """ Return correct status code """
        response_kwargs = response_kwargs or {}
        response_kwargs.update(status=self.error_code)
        return super().render_to_response(context, **response_kwargs)

Скажите django, чтобы использовать собственные обработчики ошибок

# urls.py

from index.views import ErrorHandler

# error handing handlers - fly binding
for code in (400, 403, 404, 500):
    vars()['handler{}'.format(code)] = ErrorHandler.as_view(error_code=code)

Тестовая версия для пользовательских обработчиков ошибок

# tests.py

from unittest import mock

from django.test import TestCase
from django.core.exceptions import SuspiciousOperation, PermissionDenied
from django.http import Http404
from index import views

class ErrorHandlersTestCase(TestCase):

    """ Check is correct error handlers work """

    def raise_(exception):
        def wrapped(*args, **kwargs):
            raise exception('Test exception')
        return wrapped

    def test_index_page(self):
        """ Should check is 200 on index page """
        response = self.client.get('/')
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, 'index/index.html')

    @mock.patch('index.views.IndexView.get', raise_(Http404))
    def test_404_page(self):
        """ Should check is 404 page correct """
        response = self.client.get('/')
        self.assertEqual(response.status_code, 404)
        self.assertTemplateUsed(response, 'index/error.html')
        self.assertIn('404 Page not found', response.content.decode('utf-8'))

    @mock.patch('index.views.IndexView.get', views.ErrorHandler.as_view(error_code=500))
    def test_500_page(self):
        """ Should check is 500 page correct """
        response = self.client.get('/')
        self.assertEqual(response.status_code, 500)
        self.assertTemplateUsed(response, 'index/error.html')
        self.assertIn('500 Server Error', response.content.decode('utf-8'))

    @mock.patch('index.views.IndexView.get', raise_(SuspiciousOperation))
    def test_400_page(self):
        """ Should check is 400 page correct """
        response = self.client.get('/')
        self.assertEqual(response.status_code, 400)
        self.assertTemplateUsed(response, 'index/error.html')
        self.assertIn('400 Bad request', response.content.decode('utf-8'))

    @mock.patch('index.views.IndexView.get', raise_(PermissionDenied))
    def test_403_page(self):
        """ Should check is 403 page correct """
        response = self.client.get('/')
        self.assertEqual(response.status_code, 403)
        self.assertTemplateUsed(response, 'index/error.html')
        self.assertIn('403 Permission Denied', response.content.decode('utf-8'))

Ответ 8

Вы можете просто определить handler404 и handler500 для ошибок в вашем основном файле views.py, как описано в этом ответе:

fooobar.com/questions/126089/...

Это вернет ошибку, которую вы хотите, когда Django направляется к этому обработчику. Конфигурация настраиваемого URL не требуется для маршрутизации на другое имя URL.

Ответ 9

В версиях Django & lt; 3.0, вы должны сделать следующее:

client.py

from django.core.signals import got_request_exception
from django.template import TemplateDoesNotExist
from django.test import signals
from django.test.client import Client as DjangoClient, store_rendered_templates
from django.urls import resolve
from django.utils import six
from django.utils.functional import SimpleLazyObject, curry


class Client(DjangoClient):
    """Test client that does not raise Exceptions if requested."""

    def __init__(self, 
                 enforce_csrf_checks=False, 
                 raise_request_exception=True, **defaults):
        super(Client, self).__init__(enforce_csrf_checks=enforce_csrf_checks, 
                                     **defaults)
        self.raise_request_exception = raise_request_exception

    def request(self, **request):
        """
        The master request method. Composes the environment dictionary
        and passes to the handler, returning the result of the handler.
        Assumes defaults for the query environment, which can be overridden
        using the arguments to the request.
        """
        environ = self._base_environ(**request)

        # Curry a data dictionary into an instance of the template renderer
        # callback function.
        data = {}
        on_template_render = curry(store_rendered_templates, data)
        signal_uid = "template-render-%s" % id(request)
        signals.template_rendered.connect(on_template_render, 
                                          dispatch_uid=signal_uid)
        # Capture exceptions created by the handler.
        exception_uid = "request-exception-%s" % id(request)
        got_request_exception.connect(self.store_exc_info, 
                                      dispatch_uid=exception_uid)
        try:
            try:
                response = self.handler(environ)
            except TemplateDoesNotExist as e:
                # If the view raises an exception, Django will attempt to show
                # the 500.html template. If that template is not available,
                # we should ignore the error in favor of re-raising the
                # underlying exception that caused the 500 error. Any other
                # template found to be missing during view error handling
                # should be reported as-is.
                if e.args != ('500.html',):
                    raise

            # Look for a signalled exception, clear the current context
            # exception data, then re-raise the signalled exception.
            # Also make sure that the signalled exception is cleared from
            # the local cache!
            response.exc_info = self.exc_info  # Patch exception handling
            if self.exc_info:
                exc_info = self.exc_info
                self.exc_info = None
                if self.raise_request_exception:  # Patch exception handling
                    six.reraise(*exc_info)

            # Save the client and request that stimulated the response.
            response.client = self
            response.request = request

            # Add any rendered template detail to the response.
            response.templates = data.get("templates", [])
            response.context = data.get("context")

            response.json = curry(self._parse_json, response)

            # Attach the ResolverMatch instance to the response
            response.resolver_match = SimpleLazyObject(
                lambda: resolve(request['PATH_INFO'])
            )

            # Flatten a single context. Not really necessary anymore thanks to
            # the __getattr__ flattening in ContextList, but has some edge-case
            # backwards-compatibility implications.
            if response.context and len(response.context) == 1:
                response.context = response.context[0]

            # Update persistent cookie data.
            if response.cookies:
                self.cookies.update(response.cookies)

            return response
        finally:
            signals.template_rendered.disconnect(dispatch_uid=signal_uid)
            got_request_exception.disconnect(dispatch_uid=exception_uid)

tests.py

from unittest import mock

from django.contrib.auth import get_user_model
from django.core.urlresolvers import reverse
from django.test import TestCase, override_settings

from .client import Client  # Important, we use our own Client here!


class TestErrors(TestCase):
    """Test errors."""

    @classmethod
    def setUpClass(cls):
        super(TestErrors, cls).setUpClass()
        cls.username = 'admin'
        cls.email = '[email protected]'
        cls.password = 'test1234test1234'
        cls.not_found_url = '/i-do-not-exist/'
        cls.internal_server_error_url = reverse('password_reset')

    def setUp(self):
        super(TestErrors, self).setUp()
        User = get_user_model()

        User.objects.create_user(
            self.username,
            self.email,
            self.password,
            is_staff=True,
            is_active=True
        )
        self.client = Client(raise_request_exception=False)

    # Mock in order to trigger Exception and resulting Internal server error
    @mock.patch('django.contrib.auth.views.PasswordResetView.form_class', None)
    @override_settings(DEBUG=False)
    def test_errors(self):
        self.client.login(username=self.username, password=self.password)

        with self.subTest("Not found (404)"):
            response = self.client.get(self.not_found_url, follow=True)
            self.assertNotIn('^admin/', str(response.content))

        with self.subTest("Internal server error (500)"):
            response = self.client.get(self.internal_server_error_url, 
                                       follow=True)
            self.assertNotIn('TypeError', str(response.content))

Начиная с Django 3.0, вы можете пропустить пользовательское определение Client и просто использовать код из tests.py.