mirror of
https://github.com/hwchase17/langchain
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71 lines
2.2 KiB
Python
71 lines
2.2 KiB
Python
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"""Test Momento chat message history functionality.
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To run tests, set the environment variable MOMENTO_AUTH_TOKEN to a valid
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Momento auth token. This can be obtained by signing up for a free
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Momento account at https://gomomento.com/.
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"""
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import json
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import uuid
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from datetime import timedelta
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from typing import Iterator
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import pytest
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from momento import CacheClient, Configurations, CredentialProvider
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from langchain.memory import ConversationBufferMemory
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from langchain.memory.chat_message_histories import MomentoChatMessageHistory
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from langchain.schema import _message_to_dict
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def random_string() -> str:
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return str(uuid.uuid4())
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@pytest.fixture(scope="function")
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def message_history() -> Iterator[MomentoChatMessageHistory]:
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cache_name = f"langchain-test-cache-{random_string()}"
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client = CacheClient(
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Configurations.Laptop.v1(),
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CredentialProvider.from_environment_variable("MOMENTO_AUTH_TOKEN"),
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default_ttl=timedelta(seconds=30),
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)
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try:
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chat_message_history = MomentoChatMessageHistory(
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session_id="my-test-session",
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cache_client=client,
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cache_name=cache_name,
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)
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yield chat_message_history
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finally:
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client.delete_cache(cache_name)
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def test_memory_empty_on_new_session(
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message_history: MomentoChatMessageHistory,
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) -> None:
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memory = ConversationBufferMemory(
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memory_key="foo", chat_memory=message_history, return_messages=True
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)
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assert memory.chat_memory.messages == []
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def test_memory_with_message_store(message_history: MomentoChatMessageHistory) -> None:
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memory = ConversationBufferMemory(
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memory_key="baz", chat_memory=message_history, return_messages=True
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)
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# Add some messages to the memory store
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memory.chat_memory.add_ai_message("This is me, the AI")
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memory.chat_memory.add_user_message("This is me, the human")
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# Verify that the messages are in the store
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messages = memory.chat_memory.messages
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messages_json = json.dumps([_message_to_dict(msg) for msg in messages])
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assert "This is me, the AI" in messages_json
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assert "This is me, the human" in messages_json
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# Verify clearing the store
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memory.chat_memory.clear()
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assert memory.chat_memory.messages == []
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