test_prompt_missing_input_variables() — langchain Function Reference

Architecture documentation for the test_prompt_missing_input_variables() function in test_few_shot.py from the langchain codebase.

Function python LangChainCore MessageInterface

Entity Profile

LangChainCore→ MessageInterface→ test_prompt_missing_input_variables() — langchain Function Reference

Dependency Diagram

graph TD
  8755d41c_1afe_2a43_f7a4_f0747a2dae60["test_prompt_missing_input_variables()"]
  e4e12a36_798e_ddc0_ab57_e44de269c7e7["test_few_shot.py"]
  8755d41c_1afe_2a43_f7a4_f0747a2dae60 -->|defined in| e4e12a36_798e_ddc0_ab57_e44de269c7e7
  style 8755d41c_1afe_2a43_f7a4_f0747a2dae60 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/prompts/test_few_shot.py lines 74–116

def test_prompt_missing_input_variables() -> None:
    """Test error is raised when input variables are not provided."""
    # Test when missing in suffix
    template = "This is a {foo} test."
    with pytest.raises(
        ValueError,
        match=re.escape("check for mismatched or missing input parameters from []"),
    ):
        FewShotPromptTemplate(
            input_variables=[],
            suffix=template,
            examples=[],
            example_prompt=EXAMPLE_PROMPT,
            validate_template=True,
        )
    assert FewShotPromptTemplate(
        input_variables=[],
        suffix=template,
        examples=[],
        example_prompt=EXAMPLE_PROMPT,
    ).input_variables == ["foo"]

    # Test when missing in prefix
    template = "This is a {foo} test."
    with pytest.raises(
        ValueError,
        match=re.escape("check for mismatched or missing input parameters from []"),
    ):
        FewShotPromptTemplate(
            input_variables=[],
            suffix="foo",
            examples=[],
            prefix=template,
            example_prompt=EXAMPLE_PROMPT,
            validate_template=True,
        )
    assert FewShotPromptTemplate(
        input_variables=[],
        suffix="foo",
        examples=[],
        prefix=template,
        example_prompt=EXAMPLE_PROMPT,
    ).input_variables == ["foo"]