feat: stabilize multi-region runtime sync and worker orchestration

domain-api/tests/test_redis_client.py

@@ -0,0 +1,27 @@
+import unittest
+from unittest.mock import patch
+
+from app.core.redis_client import get_redis, reset_redis_client_for_tests
+
+
+class ApiRedisClientTests(unittest.TestCase):
+    def tearDown(self) -> None:
+        reset_redis_client_for_tests()
+
+    @patch("app.core.redis_client.redis.Redis")
+    @patch("app.core.redis_client.redis.BlockingConnectionPool")
+    def test_get_redis_reuses_singleton_client(self, mock_pool, mock_redis) -> None:
+        singleton = object()
+        mock_redis.return_value = singleton
+
+        client_a = get_redis()
+        client_b = get_redis()
+
+        self.assertIs(client_a, singleton)
+        self.assertIs(client_b, singleton)
+        mock_pool.assert_called_once()
+        mock_redis.assert_called_once()
+
+
+if __name__ == "__main__":
+    unittest.main()