test_runnable_sequence_transform() — langchain Function Reference

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

Function python LangChainCore Runnables

Entity Profile

LangChainCore→ Runnables→ test_runnable_sequence_transform() — langchain Function Reference

Dependency Diagram

graph TD
  fcaae24d_7402_87c1_7158_dcdbd4fc2188["test_runnable_sequence_transform()"]
  26df6ad8_0189_51d0_c3c1_6c3248893ff5["test_runnable.py"]
  fcaae24d_7402_87c1_7158_dcdbd4fc2188 -->|defined in| 26df6ad8_0189_51d0_c3c1_6c3248893ff5
  style fcaae24d_7402_87c1_7158_dcdbd4fc2188 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/runnables/test_runnable.py lines 3773–3783

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

    chain = llm | StrOutputParser()

    stream = chain.transform(llm.stream("Hi there!"))

    chunks = list(stream)

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