Fixed #30037 -- Added request arg to RemoteUserBackend.configure_user().

tests/auth_tests/test_remote_user_deprecation.py

@@ -0,0 +1,50 @@
+import warnings
+
+from django.contrib.auth.backends import RemoteUserBackend
+from django.contrib.auth.models import User
+from django.test import TestCase, modify_settings, override_settings
+
+
+class CustomRemoteUserBackend(RemoteUserBackend):
+    """Override configure_user() without a request argument."""
+    def configure_user(self, user):
+        user.email = 'user@example.com'
+        user.save()
+        return user
+
+
+@override_settings(ROOT_URLCONF='auth_tests.urls')
+class RemoteUserCustomTest(TestCase):
+    middleware = 'django.contrib.auth.middleware.RemoteUserMiddleware'
+    backend = 'auth_tests.test_remote_user_deprecation.CustomRemoteUserBackend'
+    header = 'REMOTE_USER'
+
+    def setUp(self):
+        self.patched_settings = modify_settings(
+            AUTHENTICATION_BACKENDS={'append': self.backend},
+            MIDDLEWARE={'append': self.middleware},
+        )
+        self.patched_settings.enable()
+
+    def tearDown(self):
+        self.patched_settings.disable()
+
+    def test_configure_user_deprecation_warning(self):
+        """
+        A deprecation warning is shown for RemoteUserBackend that have a
+        configure_user() method without a request parameter.
+        """
+        num_users = User.objects.count()
+        with warnings.catch_warnings(record=True) as warns:
+            warnings.simplefilter('always')
+            response = self.client.get('/remote_user/', **{self.header: 'newuser'})
+            self.assertEqual(response.context['user'].username, 'newuser')
+        self.assertEqual(len(warns), 1)
+        self.assertEqual(
+            str(warns[0].message),
+            'Update CustomRemoteUserBackend.configure_user() to accept '
+            '`request` as the first argument.'
+        )
+        self.assertEqual(User.objects.count(), num_users + 1)
+        user = User.objects.get(username='newuser')
+        self.assertEqual(user.email, 'user@example.com')