test_multi_output_errors() — langchain Function Reference

Architecture documentation for the test_multi_output_errors() function in test_sequential.py from the langchain codebase.

Function python LangChainCore Runnables

Entity Profile

LangChainCore→ Runnables→ test_multi_output_errors() — langchain Function Reference

Dependency Diagram

graph TD
  ec5eea4a_4b9a_4af9_7c2b_b1d9a9943a7a["test_multi_output_errors()"]
  0021bb47_51ab_bafd_26b4_c2849000554a["test_sequential.py"]
  ec5eea4a_4b9a_4af9_7c2b_b1d9a9943a7a -->|defined in| 0021bb47_51ab_bafd_26b4_c2849000554a
  style ec5eea4a_4b9a_4af9_7c2b_b1d9a9943a7a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/chains/test_sequential.py lines 256–264

def test_multi_output_errors() -> None:
    """Test simple sequential errors if multiple output variables are expected."""
    chain_1 = FakeChain(input_variables=["foo"], output_variables=["bar", "grok"])
    chain_2 = FakeChain(input_variables=["bar"], output_variables=["baz"])
    with pytest.raises(
        ValueError,
        match="Value error, Chains used in SimplePipeline should all have one output",
    ):
        SimpleSequentialChain(chains=[chain_1, chain_2])