fix: test

Author: CaralHsi

src/memos/mem_os/core.py

@@ -563,7 +563,7 @@ def search(
         Returns:
             MemoryResult: A dictionary containing the search results.
         """
-        target_user_id = user_id if user_id is not None else self.user_ids
+        target_user_id = user_id if user_id is not None else self.user_id
 
         self._validate_user_exists(target_user_id)
         # Get all cubes accessible by the target user

tests/mem_reader/test_simple_structure.py

@@ -43,9 +43,9 @@ def test_init(self):
     def test_process_chat_data(self):
         """Test processing chat data into memory items."""
         scene_data_info = [
-            "user: Hello",
-            "assistant: Hi there",
-            "user: How are you?",
+            {"role": "user", "content": "Hello"},
+            {"role": "assistant", "content": "Hi there"},
+            {"role": "user", "content": "How are you?"},
         ]
         info = {"user_id": "user1", "session_id": "session1"}
 
@@ -115,7 +115,14 @@ def test_get_scene_data_info_with_chat(self):
 
         self.assertIsInstance(result, list)
         self.assertEqual(len(result), 1)
-        self.assertEqual(result[0][0], "user: [3 May 2025]: I'm feeling a bit down today.")
+        self.assertEqual(
+            result[0][0],
+            {
+                "role": "user",
+                "chat_time": "3 May 2025",
+                "content": "I'm feeling a bit down today.",
+            },
+        )
 
     @patch("memos.mem_reader.simple_struct.ParserFactory")
     def test_get_scene_data_info_with_doc(self, mock_parser_factory):