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vLLM/tests/reasoning/test_step3_reasoning_parser.py

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Python

# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
import pytest
from vllm.reasoning import ReasoningParserManager
from vllm.tokenizers import get_tokenizer
pytestmark = pytest.mark.skip_global_cleanup
REASONING_MODEL_NAME = "stepfun-ai/step3"
@pytest.fixture(scope="module")
def step3_parser():
tokenizer = get_tokenizer(tokenizer_name=REASONING_MODEL_NAME)
return ReasoningParserManager.get_reasoning_parser("step3")(tokenizer)
def test_count_reasoning_tokens_stops_at_think_end(step3_parser):
end = step3_parser.think_end_token_id
assert step3_parser.count_reasoning_tokens([11, 12, end, 13]) == 2
def test_count_reasoning_tokens_without_think_end(step3_parser):
"""Step3 treats output as reasoning until </think> appears."""
assert step3_parser.count_reasoning_tokens([11, 12, 13]) == 3