97 lines
3.3 KiB
Python
97 lines
3.3 KiB
Python
# SPDX-License-Identifier: Apache-2.0
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# SPDX-FileCopyrightText: Copyright contributors to the vLLM project
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import asyncio
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from unittest.mock import MagicMock
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import pytest
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from vllm.renderers.chat_utils import AsyncMultiModalItemTracker
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@pytest.mark.asyncio
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async def test_resolve_items_runs_modalities_concurrently_and_preserves_order():
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"""Media fetches overlap while modality and item order are preserved."""
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active_fetches = 0
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max_active_fetches = 0
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async def _fetch(name: str, delay: float):
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nonlocal active_fetches, max_active_fetches
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active_fetches += 1
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max_active_fetches = max(max_active_fetches, active_fetches)
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try:
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await asyncio.sleep(delay)
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return name, f"{name}-uuid"
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finally:
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active_fetches -= 1
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tracker = AsyncMultiModalItemTracker(MagicMock(is_multimodal_model=True))
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tracker.__dict__["mm_processor"] = MagicMock()
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tracker._items_by_modality["video"] = [
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lambda: _fetch("video-0", 0.02),
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lambda: _fetch("video-1", 0.01),
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]
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tracker._items_by_modality["image"] = [
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lambda: _fetch("image-0", 0.02),
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lambda: _fetch("image-1", 0.01),
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]
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tracker._items_by_modality["audio"] = [
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lambda: _fetch("audio-0", 0.02),
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lambda: _fetch("audio-1", 0.01),
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]
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mm_data, mm_uuids = await tracker.resolve_items()
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assert mm_data is not None
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assert mm_uuids is not None
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assert max_active_fetches == 6
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assert list(mm_data) == ["image", "audio", "video"]
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assert list(mm_uuids) == ["image", "audio", "video"]
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assert mm_data == {
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"image": ["image-0", "image-1"],
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"audio": ["audio-0", "audio-1"],
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"video": ["video-0", "video-1"],
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}
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assert mm_uuids == {
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"image": ["image-0-uuid", "image-1-uuid"],
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"audio": ["audio-0-uuid", "audio-1-uuid"],
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"video": ["video-0-uuid", "video-1-uuid"],
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}
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@pytest.mark.asyncio
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async def test_resolve_items_does_not_leak_tasks_on_partial_failure():
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"""Regression test: one failing media fetch must not abandon the other
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still-in-flight fetches across modality batches.
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Before the fix, `resolve_items` gathered per-modality fetches with plain
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`asyncio.gather`, so the first exception propagated immediately while
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sibling fetches (real network/thread-pool work in production) kept
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running detached, with nothing left to await or cancel them.
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"""
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async def _fetch(should_fail: bool, delay: float):
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if should_fail:
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await asyncio.sleep(0.01)
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raise ValueError("simulated fetch failure")
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await asyncio.sleep(delay)
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return ("decoded", None)
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tracker = AsyncMultiModalItemTracker(MagicMock())
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tracker._items_by_modality["image"] = [
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lambda: _fetch(True, 0),
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lambda: _fetch(False, 0.2),
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lambda: _fetch(False, 0.2),
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]
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tracker._items_by_modality["audio"] = [lambda: _fetch(False, 0.2)]
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tracker._items_by_modality["video"] = [lambda: _fetch(False, 0.2)]
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tasks_before = asyncio.all_tasks()
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with pytest.raises(ValueError, match="simulated fetch failure"):
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await tracker.resolve_items()
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leaked_tasks = asyncio.all_tasks() - tasks_before
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assert not leaked_tasks, (
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f"resolve_items left {len(leaked_tasks)} task(s) running after "
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f"raising: {leaked_tasks}"
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)
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