Compatibility with Django > 1.10

Changes to reflect changes after Django 1.10:

  - login and logout are now class-based views in `django.contrib.auth.views`
  - added test_middleware to confirm middleware match requests for login
	and logout views

cas/middleware.py

@@ -11,8 +11,10 @@
 
 try:
     from django.contrib.auth.views import login, logout
-except:
-    from django.contrib.auth import login, logout
+except ImportError:
+    from django.contrib.auth.views import LoginView, LogoutView
+    login = LoginView.as_view().view_class
+    logout = LogoutView.as_view().view_class
 
 from django.http import HttpResponseRedirect, HttpResponseForbidden
 from django.core.exceptions import ImproperlyConfigured
@@ -57,6 +59,11 @@ def process_view(self, request, view_func, view_args, view_kwargs):
         logout.
         """
 
+        try:
+            view_func = view_func.view_class
+        except AttributeError:
+            pass
+
         if view_func == login:
             return cas_login(request, *view_args, **view_kwargs)
         elif view_func == logout:

cas/tests/test_middleware.py

@@ -0,0 +1,45 @@
+try:
+    from unittest import mock
+except ImportError:
+    import mock
+
+from urllib.parse import quote_plus, urlencode
+
+from django.conf import settings
+from django.test import TestCase, Client, override_settings, modify_settings
+
+
+
+@override_settings(MIDDLEWARE=[
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'cas.middleware.CASMiddleware'
+])
+class CASBackendTest(TestCase):
+
+    def setUp(self):
+        from cas.tests import factories
+        self.user = factories.UserFactory.create()
+        self.client = Client()
+
+    def test_login_calls_cas_login(self):
+        resp = self.client.get('/login/')
+        self.assertTrue(resp.has_header('Location'))
+        expected_url = '{}/login?{}'.format(
+            settings.CAS_SERVER_URL,
+            urlencode({
+                'service': 'http://testserver/login/?next={}'.format(quote_plus('/'))
+            })
+        )
+        self.assertRedirects(resp, expected_url, fetch_redirect_response=False)
+
+    def test_logout_calls_cas_logout(self):
+        resp = self.client.get('/logout/')
+        self.assertTrue(resp.has_header('Location'))
+        expected_url = '{}/logout?{}'.format(
+            settings.CAS_SERVER_URL,
+            urlencode({
+                'service': 'http://testserver/'
+            })
+        )
+        self.assertRedirects(resp, expected_url, fetch_redirect_response=False)

cas/tests/urls.py

@@ -0,0 +1,5 @@
+from django.urls import path, include
+
+urlpatterns = [
+    path('', include('django.contrib.auth.urls')),
+]

run_tests.py

@@ -16,7 +16,7 @@
                                'ENGINE': 'django.db.backends.sqlite3',
                                }
                        },
-                       #ROOT_URLCONF='mailqueue.urls',
+                       ROOT_URLCONF='cas.tests.urls',
                        INSTALLED_APPS=('django.contrib.auth',
                                        'django.contrib.contenttypes',
                                        'django.contrib.sessions',
@@ -30,7 +30,7 @@
                                'ENGINE': 'django.db.backends.sqlite3',
                                }
                        },
-                       #ROOT_URLCONF='mailqueue.urls',
+                       ROOT_URLCONF='cas.tests.urls',
                        INSTALLED_APPS=('django.contrib.auth',
                                        'django.contrib.contenttypes',
                                        'django.contrib.sessions',