test_runnable_sequence_atransform() — langchain Function Reference

Architecture documentation for the test_runnable_sequence_atransform() function in test_runnable.py from the langchain codebase.

Function python LangChainCore Runnables

Entity Profile

LangChainCore→ Runnables→ test_runnable_sequence_atransform() — langchain Function Reference

Dependency Diagram

graph TD
  9431d591_f41f_1600_3cce_a722602d48c2["test_runnable_sequence_atransform()"]
  26df6ad8_0189_51d0_c3c1_6c3248893ff5["test_runnable.py"]
  9431d591_f41f_1600_3cce_a722602d48c2 -->|defined in| 26df6ad8_0189_51d0_c3c1_6c3248893ff5
  style 9431d591_f41f_1600_3cce_a722602d48c2 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_runnable.py lines 3786–3796

async def test_runnable_sequence_atransform() -> None:
    llm = FakeStreamingListLLM(responses=["foo-lish"])

    chain = llm | StrOutputParser()

    stream = chain.atransform(llm.astream("Hi there!"))

    chunks = [chunk async for chunk in stream]

    assert len(chunks) == len("foo-lish")
    assert "".join(chunks) == "foo-lish"