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"""Test HuggingFace API wrapper."""
from pathlib import Path
import pytest
from langchain.llms.huggingface_hub import HuggingFaceHub
from langchain.llms.loading import load_llm
from tests.integration_tests.llms.utils import assert_llm_equality
def test_huggingface_text_generation() -> None:
"""Test valid call to HuggingFace text generation model."""
llm = HuggingFaceHub(repo_id="gpt2", model_kwargs={"max_new_tokens": 10})
output = llm("Say foo:")
assert isinstance(output, str)
def test_huggingface_text2text_generation() -> None:
"""Test valid call to HuggingFace text2text model."""
llm = HuggingFaceHub(repo_id="google/flan-t5-xl")
output = llm("The capital of New York is")
assert output == "Albany"
def test_huggingface_call_error() -> None:
"""Test valid call to HuggingFace that errors."""
llm = HuggingFaceHub(model_kwargs={"max_new_tokens": -1})
with pytest.raises(ValueError):
llm("Say foo:")
def test_saving_loading_llm(tmp_path: Path) -> None:
"""Test saving/loading an HuggingFaceHub LLM."""
llm = HuggingFaceHub(repo_id="gpt2", model_kwargs={"max_new_tokens": 10})
llm.save(file_path=tmp_path / "hf.yaml")
loaded_llm = load_llm(tmp_path / "hf.yaml")
assert_llm_equality(llm, loaded_llm)
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