Feature/fix opensearch vector mapping (#2399)

tests/vector_stores/test_opensearch.py

@@ -5,7 +5,7 @@ from unittest.mock import MagicMock, patch
 import dotenv
 
 try:
-    from opensearchpy import OpenSearch
+    from opensearchpy import OpenSearch, AWSV4SignerAuth
 except ImportError:
     raise ImportError(
         "OpenSearch requires extra dependencies. Install with `pip install opensearch-py`"
@@ -148,3 +148,29 @@ class TestOpenSearchDB(unittest.TestCase):
     def test_delete_col(self):
         self.os_db.delete_col()
         self.client_mock.indices.delete.assert_called_once_with(index="test_collection")
+
+
+    def test_init_with_http_auth(self):
+        mock_credentials = MagicMock()
+        mock_signer = AWSV4SignerAuth(mock_credentials, "us-east-1", "es")
+
+        with patch('mem0.vector_stores.opensearch.OpenSearch') as mock_opensearch:
+            test_db = OpenSearchDB(
+                host="localhost",
+                port=9200,
+                collection_name="test_collection",
+                embedding_model_dims=1536,
+                http_auth=mock_signer,
+                verify_certs=True,
+                use_ssl=True,
+                auto_create_index=False
+            )
+
+            # Verify OpenSearch was initialized with correct params
+            mock_opensearch.assert_called_once_with(
+                hosts=[{"host": "localhost", "port": 9200}],
+                http_auth=mock_signer,
+                use_ssl=True,
+                verify_certs=True,
+                connection_class=unittest.mock.ANY
+            )