test_input_dict() — langchain Function Reference

Architecture documentation for the test_input_dict() function in test_history.py from the langchain codebase.

Function python LangChainCore Runnables calls 1

Entity Profile

LangChainCore→ Runnables→ test_input_dict() — langchain Function Reference

Dependency Diagram

graph TD
  974d7966_5254_bf08_09db_6d4176f81152["test_input_dict()"]
  0af0dfde_fe33_f3e5_b5e6_a3d18260dc67["test_history.py"]
  974d7966_5254_bf08_09db_6d4176f81152 -->|defined in| 0af0dfde_fe33_f3e5_b5e6_a3d18260dc67
  e035a3b1_d1a1_c458_c801_af1fc0272f8b["_get_get_session_history()"]
  974d7966_5254_bf08_09db_6d4176f81152 -->|calls| e035a3b1_d1a1_c458_c801_af1fc0272f8b
  style 974d7966_5254_bf08_09db_6d4176f81152 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_history.py lines 119–140

def test_input_dict() -> None:
    runnable = RunnableLambda[Any, str](
        lambda params: (
            "you said: "
            + "\n".join(
                str(m.content)
                for m in params["messages"]
                if isinstance(m, HumanMessage)
            )
        )
    )
    get_session_history = _get_get_session_history()
    with_history = RunnableWithMessageHistory(
        runnable, get_session_history, input_messages_key="messages"
    )
    config: RunnableConfig = {"configurable": {"session_id": "2"}}
    output = with_history.invoke({"messages": [HumanMessage(content="hello")]}, config)
    assert output == "you said: hello"
    output = with_history.invoke(
        {"messages": [HumanMessage(content="good bye")]}, config
    )
    assert output == "you said: hello\ngood bye"