test(backend): add coverage for services tasks and apis

apps/notifications/tests/test_tasks.py

@@ -0,0 +1,20 @@
+from unittest.mock import patch
+
+from django.conf import settings
+from django.test import TestCase
+
+from apps.notifications.tasks import cleanup_redis_notifications
+
+
+class NotificationTaskTests(TestCase):
+    @patch("apps.notifications.tasks.RedisNotificationStore.cleanup_expired")
+    def test_cleanup_redis_notifications_uses_settings_retention_days(self, cleanup_expired):
+        cleanup_expired.return_value = 7
+
+        removed = cleanup_redis_notifications()
+
+        self.assertEqual(removed, 7)
+        cleanup_expired.assert_called_once_with(
+            retention_days=settings.NOTIFICATION_RETENTION_DAYS
+        )
+