test_prompt_from_template() — langchain Function Reference

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

Function python CoreAbstractions Serialization

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CoreAbstractions→ Serialization→ test_prompt_from_template() — langchain Function Reference

Dependency Diagram

graph TD
  8a294926_a8dc_d466_3ac3_6476daee1da9["test_prompt_from_template()"]
  af1b998b_a7bf_9d5c_32ef_bab507a6bee3["test_prompt.py"]
  8a294926_a8dc_d466_3ac3_6476daee1da9 -->|defined in| af1b998b_a7bf_9d5c_32ef_bab507a6bee3
  style 8a294926_a8dc_d466_3ac3_6476daee1da9 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

libs/core/tests/unit_tests/prompts/test_prompt.py lines 51–69

def test_prompt_from_template() -> None:
    """Test prompts can be constructed from a template."""
    # Single input variable.
    template = "This is a {foo} test."
    prompt = PromptTemplate.from_template(template)
    expected_prompt = PromptTemplate(template=template, input_variables=["foo"])
    assert prompt == expected_prompt

    # Multiple input variables.
    template = "This {bar} is a {foo} test."
    prompt = PromptTemplate.from_template(template)
    expected_prompt = PromptTemplate(template=template, input_variables=["bar", "foo"])
    assert prompt == expected_prompt

    # Multiple input variables with repeats.
    template = "This {bar} is a {foo} test {foo}."
    prompt = PromptTemplate.from_template(template)
    expected_prompt = PromptTemplate(template=template, input_variables=["bar", "foo"])
    assert prompt == expected_prompt