Fixed #27542 -- Made Client.force_login() skip auth backends without get_user().

2 files changed, 15 insertions, 0 deletions

diff --git a/tests/test_client/auth_backends.py b/tests/test_client/auth_backends.py
index c886dce336..1bb1d96eeb 100644
--- a/tests/test_client/auth_backends.py
+++ b/tests/test_client/auth_backends.py
@@ -3,3 +3,7 @@ from django.contrib.auth.backends import ModelBackend
 
 class TestClientBackend(ModelBackend):
     pass
+
+
+class BackendWithoutGetUserMethod(object):
+    pass
diff --git a/tests/test_client/tests.py b/tests/test_client/tests.py
index d3eb782347..a499ee7fce 100644
--- a/tests/test_client/tests.py
+++ b/tests/test_client/tests.py
@@ -549,6 +549,17 @@ class ClientTest(TestCase):
         self.assertEqual(response.context['user'].username, 'testclient')
         self.assertEqual(self.u1.backend, 'django.contrib.auth.backends.ModelBackend')
 
+    @override_settings(AUTHENTICATION_BACKENDS=[
+        'test_client.auth_backends.BackendWithoutGetUserMethod',
+        'django.contrib.auth.backends.ModelBackend',
+    ])
+    def test_force_login_with_backend_missing_get_user(self):
+        """
+        force_login() skips auth backends without a get_user() method.
+        """
+        self.client.force_login(self.u1)
+        self.assertEqual(self.u1.backend, 'django.contrib.auth.backends.ModelBackend')
+
     @override_settings(SESSION_ENGINE="django.contrib.sessions.backends.signed_cookies")
     def test_logout_cookie_sessions(self):
         self.test_logout()