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"""Test functionality related to natbot."""
from typing import Any, List, Mapping, Optional
from pydantic import BaseModel
from langchain.chains.natbot.base import NatBotChain
from langchain.llms.base import LLM
class FakeLLM(LLM, BaseModel):
"""Fake LLM wrapper for testing purposes."""
def _call(self, prompt: str, stop: Optional[List[str]] = None) -> str:
"""Return `foo` if longer than 10000 words, else `bar`."""
if len(prompt) > 10000:
return "foo"
else:
return "bar"
@property
def _llm_type(self) -> str:
"""Return type of llm."""
return "fake"
@property
def _identifying_params(self) -> Mapping[str, Any]:
return {}
def test_proper_inputs() -> None:
"""Test that natbot shortens inputs correctly."""
nat_bot_chain = NatBotChain(llm=FakeLLM(), objective="testing")
url = "foo" * 10000
browser_content = "foo" * 10000
output = nat_bot_chain.execute(url, browser_content)
assert output == "bar"
def test_variable_key_naming() -> None:
"""Test that natbot handles variable key naming correctly."""
nat_bot_chain = NatBotChain(
llm=FakeLLM(),
objective="testing",
input_url_key="u",
input_browser_content_key="b",
output_key="c",
)
output = nat_bot_chain.execute("foo", "foo")
assert output == "bar"
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