MongoDB Vector Store misaligned strings and classes (#3064)

tests/vector_stores/test_mongodb.py

@@ -1,7 +1,6 @@
-import time
 import pytest
 from unittest.mock import MagicMock, patch
-from mem0.vector_stores.mongodb import MongoVector
+from mem0.vector_stores.mongodb import MongoDB
 from pymongo.operations import SearchIndexModel
 
 @pytest.fixture
@@ -16,12 +15,11 @@ def mongo_vector_fixture(mock_mongo_client):
     mock_collection.find.return_value = []
     mock_db.list_collection_names.return_value = []
 
-    mongo_vector = MongoVector(
+    mongo_vector = MongoDB(
         db_name="test_db",
         collection_name="test_collection",
         embedding_model_dims=1536,
-        user="username",
-        password="password",
+        mongo_uri="mongodb://username:password@localhost:27017"
     )
     return mongo_vector, mock_collection, mock_db
 
@@ -48,7 +46,7 @@ def test_initalize_create_col(mongo_vector_fixture):
                 "fields": {
                     "embedding": {
                         "type": "knnVector",
-                        "d": 1536,
+                        "dimensions": 1536,
                         "similarity": "cosine",
                     }
                 }