Fixed #26428 -- Added support for relative path redirects in assertRedirects().

Thanks Trac alias master for the report and review.

django/test/testcases.py

@@ -41,7 +41,7 @@ from django.utils.decorators import classproperty
 from django.utils.deprecation import RemovedInDjango20Warning
 from django.utils.encoding import force_text
 from django.utils.six.moves.urllib.parse import (
-    unquote, urlparse, urlsplit, urlunsplit,
+    unquote, urljoin, urlparse, urlsplit, urlunsplit,
 )
 from django.utils.six.moves.urllib.request import url2pathname
 from django.views.static import serve
@@ -291,6 +291,11 @@ class SimpleTestCase(unittest.TestCase):
             url = response.url
             scheme, netloc, path, query, fragment = urlsplit(url)
 
+            # Prepend the request path to handle relative path redirects.
+            if not path.startswith('/'):
+                url = urljoin(response.request['PATH_INFO'], url)
+                path = urljoin(response.request['PATH_INFO'], path)
+
             if fetch_redirect_response:
                 redirect_response = response.client.get(path, QueryDict(query),
                                                         secure=(scheme == 'https'))

docs/releases/1.9.6.txt

@@ -9,4 +9,6 @@ Django 1.9.6 fixes several bugs in 1.9.5.
 Bugfixes
 ========
 
-* ...
+* Added support for relative path redirects to
+  ``SimpleTestCase.assertRedirects()`` because Django 1.9 no longer converts
+  redirects to absolute URIs (:ticket:`26428`).

tests/test_client/tests.py

@@ -623,6 +623,14 @@ class ClientTest(TestCase):
         # Check some response details
         self.assertContains(response, 'This is a test')
 
+    def test_relative_redirect(self):
+        response = self.client.get('/accounts/')
+        self.assertRedirects(response, '/accounts/login/')
+
+    def test_relative_redirect_no_trailing_slash(self):
+        response = self.client.get('/accounts/no_trailing_slash')
+        self.assertRedirects(response, '/accounts/login/')
+
     def test_mass_mail_sending(self):
         "Test that mass mail is redirected to a dummy outbox during test setup"
 

tests/test_client/urls.py

@@ -34,6 +34,8 @@ urlpatterns = [
     url(r'^nesting_exception_view/$', views.nesting_exception_view),
     url(r'^django_project_redirect/$', views.django_project_redirect),
 
+    url(r'^accounts/$', RedirectView.as_view(url='login/')),
+    url(r'^accounts/no_trailing_slash$', RedirectView.as_view(url='login/')),
     url(r'^accounts/login/$', auth_views.login, {'template_name': 'login.html'}),
     url(r'^accounts/logout/$', auth_views.logout),
 ]