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68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
"""Optional integration test for example_trainer.vllm_api_server /generate."""
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from importlib import import_module
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import pytest
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from fastapi.testclient import TestClient
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@pytest.mark.asyncio
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async def test_vllm_api_server_generate_endpoint_optional():
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"""
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Validate /generate contract on the custom vLLM API server.
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This test only runs when vLLM is installed.
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"""
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pytest.importorskip("vllm")
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module = import_module("example_trainer.vllm_api_server")
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class _FakeLogprob:
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def __init__(self, value: float):
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self.logprob = value
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class _FakeOutput:
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def __init__(self):
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self.text = " world"
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self.finish_reason = "stop"
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self.logprobs = [{11: _FakeLogprob(-0.3)}]
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self.token_ids = [11]
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class _FakeRequestOutput:
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def __init__(self):
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self.prompt = "hello"
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self.prompt_token_ids = [1, 2]
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self.outputs = [_FakeOutput()]
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class _FakeEngine:
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tokenizer = type("Tok", (), {"decode": staticmethod(lambda _: "hello")})()
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def generate(self, *_args, **_kwargs):
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async def _gen():
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yield _FakeRequestOutput()
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return _gen()
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old_engine = module.engine
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module.engine = _FakeEngine()
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try:
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client = TestClient(module.app)
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resp = client.post(
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"/generate",
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json={
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"prompt": "hello",
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"max_tokens": 1,
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"temperature": 0.0,
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"logprobs": 1,
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},
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)
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assert resp.status_code == 200
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body = resp.json()
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assert "text" in body and body["text"] == [" world"]
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assert body["prompt"] == "hello"
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assert body["finish_reasons"] == ["stop"]
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assert "logprobs" in body
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assert "token_ids" in body
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assert "prompt_token_ids" in body
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finally:
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module.engine = old_engine
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