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107 lines
3.2 KiB
Python
107 lines
3.2 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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from typing import Any, Optional
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import pytest
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from vllm import LLM, SamplingParams, envs
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MODEL = "meta-llama/llama-2-7b-hf"
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MAX_TOKENS = 200
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def _test_stopping(llm: LLM,
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expected_output: str,
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expected_reason: Any,
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stop: Optional[list[str]] = None,
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stop_token_ids: Optional[list[int]] = None,
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include_in_output: bool = False) -> None:
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output = llm.generate(
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"A story about vLLM:\n",
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SamplingParams(
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temperature=0.0,
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max_tokens=MAX_TOKENS,
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stop=stop,
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stop_token_ids=stop_token_ids,
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include_stop_str_in_output=include_in_output,
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))[0].outputs[0]
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assert output is not None
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assert output.text == expected_output
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assert output.stop_reason == expected_reason
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def _stop_basic(llm):
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_test_stopping(llm,
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stop=["."],
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include_in_output=False,
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expected_output="VLLM is a 100% volunteer organization",
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expected_reason=".")
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_test_stopping(llm,
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stop=["."],
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include_in_output=True,
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expected_output="VLLM is a 100% volunteer organization.",
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expected_reason=".")
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def _stop_multi_tokens(llm):
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_test_stopping(
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llm,
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stop=["group of peo", "short"],
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include_in_output=False,
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expected_output="VLLM is a 100% volunteer organization. We are a ",
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expected_reason="group of peo")
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_test_stopping(
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llm,
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stop=["group of peo", "short"],
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include_in_output=True,
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expected_output=
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"VLLM is a 100% volunteer organization. We are a group of peo",
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expected_reason="group of peo")
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def _stop_partial_token(llm):
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_test_stopping(llm,
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stop=["gani"],
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include_in_output=False,
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expected_output="VLLM is a 100% volunteer or",
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expected_reason="gani")
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_test_stopping(llm,
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stop=["gani"],
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include_in_output=True,
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expected_output="VLLM is a 100% volunteer organi",
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expected_reason="gani")
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def _stop_token_id(llm):
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# token id 13013 => " organization"
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_test_stopping(llm,
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stop_token_ids=[13013],
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include_in_output=False,
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expected_output="VLLM is a 100% volunteer",
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expected_reason=13013)
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_test_stopping(llm,
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stop_token_ids=[13013],
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include_in_output=True,
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expected_output="VLLM is a 100% volunteer organization",
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expected_reason=13013)
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@pytest.mark.skip_global_cleanup
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def test_stop_strings():
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# If V0, must set enforce_eager=False since we use
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# async output processing below.
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llm = LLM(MODEL, enforce_eager=envs.VLLM_USE_V1)
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_stop_basic(llm)
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_stop_multi_tokens(llm)
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_stop_partial_token(llm)
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# FIXME: this does not respect include_in_output=False
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# _stop_token_id(llm)
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