langchain/tests/unit_tests/test_prompt.py

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2022-10-24 21:51:15 +00:00
"""Test functionality related to prompts."""
import pytest
from langchain.prompt import Prompt
def test_prompt_valid() -> None:
"""Test prompts can be constructed."""
template = "This is a {foo} test."
input_variables = ["foo"]
prompt = Prompt(input_variables=input_variables, template=template)
assert prompt.template == template
assert prompt.input_variables == input_variables
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 = []
with pytest.raises(ValueError):
Prompt(input_variables=input_variables, template=template)
def test_prompt_extra_input_variables() -> None:
"""Test error is raised when there are too many input variables."""
template = "This is a {foo} test."
input_variables = ["foo", "bar"]
with pytest.raises(ValueError):
Prompt(input_variables=input_variables, template=template)
def test_prompt_wrong_input_variables() -> None:
"""Test error is raised when name of input variable is wrong."""
template = "This is a {foo} test."
input_variables = ["bar"]
with pytest.raises(ValueError):
Prompt(input_variables=input_variables, template=template)
def test_prompt_invalid_template_format() -> None:
"""Test initializing a prompt with invalid template format."""
template = "This is a {foo} test."
input_variables = ["foo"]
with pytest.raises(ValueError):
Prompt(
input_variables=input_variables, template=template, template_format="bar"
)