Fixed #34849 -- Avoided raising RuntimeWarning about import-time queries when apps are reinitialized with test tools.

Regression in fbd16438f46bc2128926958ad24331da5d1b406f.

2 files changed, 15 insertions, 5 deletions

diff --git a/tests/apps/tests.py b/tests/apps/tests.py
index e443e37dc5..fba9c43a34 100644
--- a/tests/apps/tests.py
+++ b/tests/apps/tests.py
@@ -607,10 +607,9 @@ class QueryPerformingAppTests(TransactionTestCase):
         custom_settings = override_settings(
             INSTALLED_APPS=[f"apps.query_performing_app.apps.{app_config_name}"]
         )
-        # Ignore the RuntimeWarning, as override_settings.enable() calls
-        # AppConfig.ready() which will trigger the warning.
-        with self.assertWarnsMessage(RuntimeWarning, self.expected_msg):
-            custom_settings.enable()
+        custom_settings.enable()
+        old_stored_app_configs = apps.stored_app_configs
+        apps.stored_app_configs = []
         try:
             with patch.multiple(apps, ready=False, loading=False, app_configs={}):
                 with self.assertWarnsMessage(RuntimeWarning, self.expected_msg):
@@ -619,4 +618,5 @@ class QueryPerformingAppTests(TransactionTestCase):
                 app_config = apps.get_app_config("query_performing_app")
                 return app_config.query_results
         finally:
+            setattr(apps, "stored_app_configs", old_stored_app_configs)
             custom_settings.disable()
diff --git a/tests/postgres_tests/test_apps.py b/tests/postgres_tests/test_apps.py
index 3fdd7c3faf..ea2a28d7a8 100644
--- a/tests/postgres_tests/test_apps.py
+++ b/tests/postgres_tests/test_apps.py
@@ -5,7 +5,7 @@ from django.db import connection
 from django.db.backends.signals import connection_created
 from django.db.migrations.writer import MigrationWriter
 from django.test import TestCase
-from django.test.utils import modify_settings
+from django.test.utils import CaptureQueriesContext, modify_settings, override_settings
 
 try:
     from django.contrib.postgres.fields import (
@@ -14,6 +14,7 @@ try:
         DecimalRangeField,
         IntegerRangeField,
     )
+    from django.contrib.postgres.signals import get_hstore_oids
     from django.db.backends.postgresql.psycopg_any import (
         DateRange,
         DateTimeRange,
@@ -27,6 +28,15 @@ except ImportError:
 
 @unittest.skipUnless(connection.vendor == "postgresql", "PostgreSQL specific tests")
 class PostgresConfigTests(TestCase):
+    def test_install_app_no_warning(self):
+        # Clear cache to force queries when (re)initializing the
+        # "django.contrib.postgres" app.
+        get_hstore_oids.cache_clear()
+        with CaptureQueriesContext(connection) as captured_queries:
+            with override_settings(INSTALLED_APPS=["django.contrib.postgres"]):
+                pass
+        self.assertGreaterEqual(len(captured_queries), 1)
+
     def test_register_type_handlers_connection(self):
         from django.contrib.postgres.signals import register_type_handlers