test_sequential_missing_inputs() — langchain Function Reference

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

Function python LangChainCore ApiManagement

Entity Profile

LangChainCore→ ApiManagement→ test_sequential_missing_inputs() — langchain Function Reference

Dependency Diagram

graph TD
  21ebe459_58ee_b923_ab1f_26916907349f["test_sequential_missing_inputs()"]
  0021bb47_51ab_bafd_26b4_c2849000554a["test_sequential.py"]
  21ebe459_58ee_b923_ab1f_26916907349f -->|defined in| 0021bb47_51ab_bafd_26b4_c2849000554a
  style 21ebe459_58ee_b923_ab1f_26916907349f fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/chains/test_sequential.py lines 143–152

def test_sequential_missing_inputs() -> None:
    """Test error is raised when input variables are missing."""
    chain_1 = FakeChain(input_variables=["foo"], output_variables=["bar"])
    chain_2 = FakeChain(input_variables=["bar", "test"], output_variables=["baz"])
    with pytest.raises(
        ValueError,
        match=re.escape("Value error, Missing required input keys: {'test'}"),
    ):
        # Also needs "test" as an input
        SequentialChain(chains=[chain_1, chain_2], input_variables=["foo"])  # type: ignore[call-arg]