langchain/tests/integration_tests/memory/test_firestore.py

import json

from langchain.memory import ConversationBufferMemory
from langchain.memory.chat_message_histories import FirestoreChatMessageHistory
from langchain.schema import _message_to_dict


def test_memory_with_message_store() -> None:
    """Test the memory with a message store."""

    message_history = FirestoreChatMessageHistory(
        collection_name="chat_history",
        session_id="my-test-session",
        user_id="my-test-user",
    )
    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 check if the messages are there as expected
    message_history = FirestoreChatMessageHistory(
        collection_name="chat_history",
        session_id="my-test-session",
        user_id="my-test-user",
    )
    memory = ConversationBufferMemory(
        memory_key="baz", chat_memory=message_history, return_messages=True
    )
    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 Firestore, so the next test run won't pick it up
    memory.chat_memory.clear()

    assert memory.chat_memory.messages == []