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vllm-omni/tests/diffusion/test_async_output_timeout.py
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# SPDX-License-Identifier: Apache-2.0
# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
"""Unit tests for the async-output wait bound (_async_output_timeout)."""
import logging
import pytest
from vllm_omni.diffusion.diffusion_engine import (
_ASYNC_OUTPUT_TIMEOUT_DEFAULT,
_ASYNC_OUTPUT_TIMEOUT_ENV,
_async_output_timeout,
)
pytestmark = [pytest.mark.core_model, pytest.mark.cpu]
class TestAsyncOutputTimeoutIsConfigurable:
def test_default_is_generous(self, monkeypatch):
"""The bound covers a copy queued behind a full denoise step, so the
default must not be tight enough to abort a slow but healthy render.
"""
monkeypatch.delenv(_ASYNC_OUTPUT_TIMEOUT_ENV, raising=False)
assert _async_output_timeout() == _ASYNC_OUTPUT_TIMEOUT_DEFAULT == 600.0
def test_env_var_overrides_the_default(self, monkeypatch):
monkeypatch.setenv(_ASYNC_OUTPUT_TIMEOUT_ENV, "1800")
assert _async_output_timeout() == 1800.0
def test_env_var_accepts_a_float(self, monkeypatch):
monkeypatch.setenv(_ASYNC_OUTPUT_TIMEOUT_ENV, "45.5")
assert _async_output_timeout() == 45.5
def test_value_is_not_frozen_at_import(self, monkeypatch):
"""Resolved per call rather than captured in a module constant, so the
value never goes stale relative to os.environ and no module reload is
needed to exercise it.
"""
monkeypatch.setenv(_ASYNC_OUTPUT_TIMEOUT_ENV, "60")
assert _async_output_timeout() == 60.0
monkeypatch.setenv(_ASYNC_OUTPUT_TIMEOUT_ENV, "120")
assert _async_output_timeout() == 120.0
class TestAsyncOutputTimeoutRejectsBadValues:
"""This runs on the request path, so a typo in the environment must degrade
to the default rather than fail the generation.
"""
@pytest.mark.parametrize("value", ["", "abc", "30s", "None"])
def test_non_numeric_falls_back_to_the_default(self, monkeypatch, caplog, value):
monkeypatch.setenv(_ASYNC_OUTPUT_TIMEOUT_ENV, value)
with caplog.at_level(logging.WARNING):
assert _async_output_timeout() == _ASYNC_OUTPUT_TIMEOUT_DEFAULT
@pytest.mark.parametrize("value", ["0", "-1", "-0.5"])
def test_non_positive_falls_back_to_the_default(self, monkeypatch, caplog, value):
monkeypatch.setenv(_ASYNC_OUTPUT_TIMEOUT_ENV, value)
with caplog.at_level(logging.WARNING):
assert _async_output_timeout() == _ASYNC_OUTPUT_TIMEOUT_DEFAULT