test_ai.py — langchain Source File

Source Code

from typing import cast

from langchain_core.load import dumpd, load
from langchain_core.messages import AIMessage, AIMessageChunk
from langchain_core.messages import content as types
from langchain_core.messages.ai import (
    InputTokenDetails,
    OutputTokenDetails,
    UsageMetadata,
    add_ai_message_chunks,
    add_usage,
    subtract_usage,
)
from langchain_core.messages.tool import invalid_tool_call as create_invalid_tool_call
from langchain_core.messages.tool import tool_call as create_tool_call
from langchain_core.messages.tool import tool_call_chunk as create_tool_call_chunk


def test_serdes_message() -> None:
    msg = AIMessage(
        content=[{"text": "blah", "type": "text"}],
        tool_calls=[create_tool_call(name="foo", args={"bar": 1}, id="baz")],
        invalid_tool_calls=[
            create_invalid_tool_call(name="foobad", args="blah", id="booz", error="bad")
        ],
    )
    expected = {
        "lc": 1,
        "type": "constructor",
        "id": ["langchain", "schema", "messages", "AIMessage"],
        "kwargs": {
            "type": "ai",
            "content": [{"text": "blah", "type": "text"}],
            "tool_calls": [
                {"name": "foo", "args": {"bar": 1}, "id": "baz", "type": "tool_call"}
            ],
            "invalid_tool_calls": [
                {
                    "name": "foobad",
                    "args": "blah",
                    "id": "booz",
                    "error": "bad",
                    "type": "invalid_tool_call",
                }
            ],
        },
    }
    actual = dumpd(msg)
    assert actual == expected
    assert load(actual, allowed_objects=[AIMessage]) == msg


def test_serdes_message_chunk() -> None:
    chunk = AIMessageChunk(
        content=[{"text": "blah", "type": "text"}],
        tool_call_chunks=[
            create_tool_call_chunk(name="foo", args='{"bar": 1}', id="baz", index=0),
            create_tool_call_chunk(
                name="foobad",
                args="blah",
// ... (445 more lines)