PLAT-1858 Better capture of deprecation warnings

common/djangoapps/student/views.py

@@ -2412,7 +2412,9 @@ def auto_auth(request):
 
     # Log in as the user
     if login_when_done:
-        user = authenticate(username=username, password=password)
+        backend = load_backend(NEW_USER_AUTH_BACKEND)
+        user = backend.authenticate(request=request, username=username, password=password)
+        user.backend = NEW_USER_AUTH_BACKEND
         login(request, user)
 
     create_comments_service_user(user)

common/lib/pytest.ini

@@ -1,6 +1,11 @@
 [pytest]
 DJANGO_SETTINGS_MODULE = openedx.tests.settings
 addopts = --nomigrations --reuse-db --durations=20
+# Enable default handling for all warnings, including those that are ignored by default;
+# but hide rate-limit warnings, because we deliberately don't throttle test user logins
+filterwarnings =
+    default
+    ignore:No request passed to the backend, unable to rate-limit.*:UserWarning
 norecursedirs = .cache
 python_classes =
 python_files = tests.py test_*.py tests_*.py *_tests.py __init__.py

common/test/pytest.ini

@@ -1,3 +1,8 @@
 [pytest]
 addopts = -p no:randomly --durations=20
+# Enable default handling for all warnings, including those that are ignored by default;
+# but hide rate-limit warnings, because we deliberately don't throttle test user logins
+filterwarnings =
+    default
+    ignore:No request passed to the backend, unable to rate-limit.*:UserWarning
 norecursedirs = .cache