mirror of
https://github.com/hwchase17/langchain
synced 2024-11-08 07:10:35 +00:00
35c9e6ab40
- Update the load_tools method to properly accept `callbacks` arguments. - Add a deprecation warning when `callback_manager` is passed - Add two unit tests to check the deprecation warning is raised and to confirm the callback is passed through. Closes issue #4096
93 lines
3.3 KiB
Python
93 lines
3.3 KiB
Python
"""Test tool utils."""
|
|
import unittest
|
|
from typing import Any, Type
|
|
from unittest.mock import MagicMock, Mock
|
|
|
|
import pytest
|
|
|
|
from langchain.agents import load_tools
|
|
from langchain.agents.agent import Agent
|
|
from langchain.agents.chat.base import ChatAgent
|
|
from langchain.agents.conversational.base import ConversationalAgent
|
|
from langchain.agents.conversational_chat.base import ConversationalChatAgent
|
|
from langchain.agents.mrkl.base import ZeroShotAgent
|
|
from langchain.agents.react.base import ReActDocstoreAgent, ReActTextWorldAgent
|
|
from langchain.agents.self_ask_with_search.base import SelfAskWithSearchAgent
|
|
from langchain.agents.tools import Tool, tool
|
|
from tests.unit_tests.callbacks.fake_callback_handler import FakeCallbackHandler
|
|
|
|
|
|
@pytest.mark.parametrize(
|
|
"agent_cls",
|
|
[
|
|
ZeroShotAgent,
|
|
ChatAgent,
|
|
ConversationalChatAgent,
|
|
ConversationalAgent,
|
|
ReActDocstoreAgent,
|
|
ReActTextWorldAgent,
|
|
SelfAskWithSearchAgent,
|
|
],
|
|
)
|
|
def test_single_input_agent_raises_error_on_structured_tool(
|
|
agent_cls: Type[Agent],
|
|
) -> None:
|
|
"""Test that older agents raise errors on older tools."""
|
|
|
|
@tool
|
|
def the_tool(foo: str, bar: str) -> str:
|
|
"""Return the concat of foo and bar."""
|
|
return foo + bar
|
|
|
|
with pytest.raises(
|
|
ValueError,
|
|
match=f"{agent_cls.__name__} does not support" # type: ignore
|
|
f" multi-input tool {the_tool.name}.",
|
|
):
|
|
agent_cls.from_llm_and_tools(MagicMock(), [the_tool]) # type: ignore
|
|
|
|
|
|
def test_tool_no_args_specified_assumes_str() -> None:
|
|
"""Older tools could assume *args and **kwargs were passed in."""
|
|
|
|
def ambiguous_function(*args: Any, **kwargs: Any) -> str:
|
|
"""An ambiguously defined function."""
|
|
return args[0]
|
|
|
|
some_tool = Tool(
|
|
name="chain_run",
|
|
description="Run the chain",
|
|
func=ambiguous_function,
|
|
)
|
|
expected_args = {"tool_input": {"type": "string"}}
|
|
assert some_tool.args == expected_args
|
|
assert some_tool.run("foobar") == "foobar"
|
|
assert some_tool.run({"tool_input": "foobar"}) == "foobar"
|
|
with pytest.raises(ValueError, match="Too many arguments to single-input tool"):
|
|
some_tool.run({"tool_input": "foobar", "other_input": "bar"})
|
|
|
|
|
|
def test_load_tools_with_callback_manager_raises_deprecation_warning() -> None:
|
|
"""Test load_tools raises a deprecation for old callback manager kwarg."""
|
|
callback_manager = MagicMock()
|
|
with pytest.warns(DeprecationWarning, match="callback_manager is deprecated"):
|
|
tools = load_tools(["requests_get"], callback_manager=callback_manager)
|
|
assert len(tools) == 1
|
|
assert tools[0].callbacks == callback_manager
|
|
|
|
|
|
def test_load_tools_with_callbacks_is_called() -> None:
|
|
"""Test callbacks are called when provided to load_tools fn."""
|
|
callbacks = [FakeCallbackHandler()]
|
|
tools = load_tools(["requests_get"], callbacks=callbacks) # type: ignore
|
|
assert len(tools) == 1
|
|
# Patch the requests.get() method to return a mock response
|
|
with unittest.mock.patch(
|
|
"langchain.requests.TextRequestsWrapper.get",
|
|
return_value=Mock(text="Hello world!"),
|
|
):
|
|
result = tools[0].run("https://www.google.com")
|
|
assert result.text == "Hello world!"
|
|
assert callbacks[0].tool_starts == 1
|
|
assert callbacks[0].tool_ends == 1
|