test_run_with_callback_and_input_error() — langchain Function Reference

Architecture documentation for the test_run_with_callback_and_input_error() function in test_base.py from the langchain codebase.

Function python LangChainCore LanguageModelBase

Entity Profile

LangChainCore→ LanguageModelBase→ test_run_with_callback_and_input_error() — langchain Function Reference

Dependency Diagram

graph TD
  fc404af8_44a8_a141_77eb_9c839aabeeea["test_run_with_callback_and_input_error()"]
  cbc5b920_9825_eac5_8cc4_bc8187fb214c["test_base.py"]
  fc404af8_44a8_a141_77eb_9c839aabeeea -->|defined in| cbc5b920_9825_eac5_8cc4_bc8187fb214c
  style fc404af8_44a8_a141_77eb_9c839aabeeea fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/langchain/tests/unit_tests/chains/test_base.py lines 183–196

def test_run_with_callback_and_input_error() -> None:
    """Test callback manager catches run validation input error."""
    handler = FakeCallbackHandler()
    chain = FakeChain(
        the_input_keys=["foo", "bar"],
        callbacks=[handler],
    )

    with pytest.raises(ValueError, match=re.escape("Missing some input keys: {'foo'}")):
        chain({"bar": "foo"})

    assert handler.starts == 1
    assert handler.ends == 0
    assert handler.errors == 1