langchain/tests/integration_tests/llms/test_ctransformers.py

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"""Test C Transformers wrapper."""
from langchain.llms import CTransformers
from tests.unit_tests.callbacks.fake_callback_handler import FakeCallbackHandler
def test_ctransformers_call() -> None:
"""Test valid call to C Transformers."""
config = {"max_new_tokens": 5}
callback_handler = FakeCallbackHandler()
llm = CTransformers(
model="marella/gpt-2-ggml",
config=config,
callbacks=[callback_handler],
)
output = llm("Say foo:")
assert isinstance(output, str)
assert len(output) > 1
assert 0 < callback_handler.llm_streams <= config["max_new_tokens"]