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import json
import os
from langchain.memory import ConversationBufferMemory
from langchain.memory.chat_message_histories import CosmosDBChatMessageHistory
from langchain.schema import _message_to_dict
# Replace these with your Azure Cosmos DB endpoint and key
endpoint = os.environ["COSMOS_DB_ENDPOINT"]
credential = os.environ["COSMOS_DB_KEY"]
def test_memory_with_message_store() -> None:
"""Test the memory with a message store."""
# setup Azure Cosmos DB as a message store
message_history = CosmosDBChatMessageHistory(
cosmos_endpoint=endpoint,
cosmos_database="chat_history",
cosmos_container="messages",
credential=credential,
session_id="my-test-session",
user_id="my-test-user",
ttl=10,
)
message_history.prepare_cosmos()
memory = ConversationBufferMemory(
memory_key="baz", chat_memory=message_history, return_messages=True
)
# add some messages
memory.chat_memory.add_ai_message("This is me, the AI")
memory.chat_memory.add_user_message("This is me, the human")
# get the message history from the memory store and turn it into a json
messages = memory.chat_memory.messages
messages_json = json.dumps([_message_to_dict(msg) for msg in messages])
assert "This is me, the AI" in messages_json
assert "This is me, the human" in messages_json
# remove the record from Azure Cosmos DB, so the next test run won't pick it up
memory.chat_memory.clear()
assert memory.chat_memory.messages == []
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