1 files changed, 15 insertions, 1 deletions
diff --git a/tests/admin_views/tests.py b/tests/admin_views/tests.py
index 19bf00f302..75e8a51acd 100644
--- a/tests/admin_views/tests.py
+++ b/tests/admin_views/tests.py
@@ -9,7 +9,7 @@ import unittest
 from django.conf import settings, global_settings
 from django.core import mail
 from django.core.files import temp as tempfile
-from django.core.urlresolvers import reverse
+from django.core.urlresolvers import reverse, NoReverseMatch
 # Register auth models with the admin.
 from django.contrib.auth import get_permission_codename
 from django.contrib.admin.helpers import ACTION_CHECKBOX_NAME
@@ -640,6 +640,20 @@ class AdminViewBasicTest(AdminViewBasicTestCase):
         # Check the format of the shown object -- shouldn't contain a change link
         self.assertContains(response, '<th class="field-__str__">UnchangeableObject object</th>', html=True)
 
+    def test_invalid_appindex_url(self):
+        """
+        #21056 -- URL reversing shouldn't work for nonexistent apps.
+        """
+        good_url = '/test_admin/admin/admin_views/'
+        confirm_good_url = reverse('admin:app_list',
+                                   kwargs={'app_label': 'admin_views'})
+        self.assertEqual(good_url, confirm_good_url)
+
+        with self.assertRaises(NoReverseMatch):
+            reverse('admin:app_list', kwargs={'app_label': 'this_should_fail'})
+        with self.assertRaises(NoReverseMatch):
+            reverse('admin:app_list', args=('admin_views2',))
+
 
 @override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
 class AdminViewFormUrlTest(TestCase):