Refs #24397 -- Sped up model reloading in ProjectState.

Created bulk_update() context manager on StateApps. Sped up unregistering
models in reload_models() by using this context mananger.

1 files changed, 16 insertions, 0 deletions

diff --git a/tests/migrations/test_state.py b/tests/migrations/test_state.py
index 530ca60c6f..551ca11459 100644
--- a/tests/migrations/test_state.py
+++ b/tests/migrations/test_state.py
@@ -160,6 +160,22 @@ class StateTests(TestCase):
         self.assertEqual([mgr.args for name, mgr in food_order_manager_state.managers],
                          [('a', 'b', 1, 2), ('x', 'y', 3, 4)])
 
+    def test_apps_bulk_update(self):
+        """
+        StateApps.bulk_update() should update apps.ready to False and reset
+        the value afterwards.
+        """
+        project_state = ProjectState()
+        apps = project_state.apps
+        with apps.bulk_update():
+            self.assertFalse(apps.ready)
+        self.assertTrue(apps.ready)
+        with self.assertRaises(ValueError):
+            with apps.bulk_update():
+                self.assertFalse(apps.ready)
+                raise ValueError()
+        self.assertTrue(apps.ready)
+
     def test_render(self):
         """
         Tests rendering a ProjectState into an Apps.