test_sequential_bad_outputs() — langchain Function Reference

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

Function python LangChainCore Runnables

Entity Profile

LangChainCore→ Runnables→ test_sequential_bad_outputs() — langchain Function Reference

Dependency Diagram

graph TD
  f9514ddd_e1c2_9275_0a3a_1fdc2fe97c99["test_sequential_bad_outputs()"]
  0021bb47_51ab_bafd_26b4_c2849000554a["test_sequential.py"]
  f9514ddd_e1c2_9275_0a3a_1fdc2fe97c99 -->|defined in| 0021bb47_51ab_bafd_26b4_c2849000554a
  style f9514ddd_e1c2_9275_0a3a_1fdc2fe97c99 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/chains/test_sequential.py lines 155–170

def test_sequential_bad_outputs() -> None:
    """Test error is raised when bad outputs are specified."""
    chain_1 = FakeChain(input_variables=["foo"], output_variables=["bar"])
    chain_2 = FakeChain(input_variables=["bar"], output_variables=["baz"])
    with pytest.raises(
        ValueError,
        match=re.escape(
            "Value error, Expected output variables that were not found: {'test'}."
        ),
    ):
        # "test" is not present as an output variable.
        SequentialChain(
            chains=[chain_1, chain_2],
            input_variables=["foo"],
            output_variables=["test"],
        )