Ensure that /en redirects to /en-US instead of /en-us.

apps/sumo/tests/test_locale_middleware.py

@@ -29,3 +29,8 @@ class TestLocaleMiddleware(TestCase):
         """Requests for /fr-FR/search should end up on /fr/search"""
         reponse = self.client.get('/fr-FR/search', follow=True)
         self.assertRedirects(reponse, '/fr/search', status_code=301)
+
+    def test_partial_redirect(self):
+        """Ensure that /en/ gets directed to /en-US/."""
+        response = self.client.get('/en/search', follow=True)
+        self.assertRedirects(response, '/en-US/search', status_code=301)

apps/sumo/urlresolvers.py

@@ -32,7 +32,8 @@ def reverse(viewname, urlconf=None, args=None, kwargs=None, prefix=None):
 
 
 def find_supported(test):
-    return [x for x in settings.LANGUAGE_URL_MAP if
+    return [settings.LANGUAGE_URL_MAP[x] for
+            x in settings.LANGUAGE_URL_MAP if
             x.split('-', 1)[0] == test.lower().split('-', 1)[0]]