test_prompt_missing_input_variables() — langchain Function Reference

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

Function python CoreAbstractions RunnableInterface

Entity Profile

CoreAbstractions→ RunnableInterface→ test_prompt_missing_input_variables() — langchain Function Reference

Dependency Diagram

graph TD
  b7830784_34c7_db1c_1c55_d822350b7817["test_prompt_missing_input_variables()"]
  af1b998b_a7bf_9d5c_32ef_bab507a6bee3["test_prompt.py"]
  b7830784_34c7_db1c_1c55_d822350b7817 -->|defined in| af1b998b_a7bf_9d5c_32ef_bab507a6bee3
  style b7830784_34c7_db1c_1c55_d822350b7817 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/prompts/test_prompt.py lines 264–277

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