259 lines
9.1 KiB
Python
259 lines
9.1 KiB
Python
"""FC-3i: Celery signal → task_run row tests.
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Uses task_always_eager so signals fire synchronously in-process during
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the test. Scoped autouse fixture keeps the eager mode confined to this
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file (other tests may break with eager mode enabled globally).
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Test assertions on signal-mutated rows use COLUMN SELECTS / db_sync.
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scalar (per reference_async_coredml_test_assertions). ORM attribute
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access on a row a signal handler just mutated risks MissingGreenlet
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across async/sync boundaries.
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"""
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import pytest
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from sqlalchemy import func, select
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from backend.app.celery_app import celery
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from backend.app.models import TaskRun
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pytestmark = pytest.mark.integration
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@pytest.fixture(autouse=True)
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def _eager_celery(monkeypatch):
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"""task_always_eager so signals fire in-process during the test."""
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monkeypatch.setattr(celery.conf, "task_always_eager", True)
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monkeypatch.setattr(celery.conf, "task_eager_propagates", False)
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@pytest.mark.asyncio
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async def test_prerun_inserts_running_row(db_sync):
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"""Fire a no-op task; assert task_run row inserted with running status."""
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from backend.app.tasks.thumbnail import generate_thumbnail
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generate_thumbnail.delay(999_999) # nonexistent image_id → no-op
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rows = db_sync.execute(
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select(TaskRun.queue, TaskRun.target_id, TaskRun.task_name)
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.where(TaskRun.target_id == 999_999)
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).all()
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assert len(rows) == 1
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queue, target_id, task_name = rows[0]
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assert queue == "thumbnail"
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assert target_id == 999_999
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assert task_name.endswith(".generate_thumbnail")
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@pytest.mark.asyncio
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async def test_postrun_marks_ok_with_duration(db_sync):
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from backend.app.tasks.thumbnail import generate_thumbnail
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generate_thumbnail.delay(999_998)
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row = db_sync.execute(
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select(
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TaskRun.status, TaskRun.finished_at, TaskRun.duration_ms,
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).where(TaskRun.target_id == 999_998)
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).one()
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status, finished_at, duration_ms = row
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assert status == "ok"
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assert finished_at is not None
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assert duration_ms is not None and duration_ms >= 0
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@pytest.mark.asyncio
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async def test_failure_records_error_type_and_message(db_sync, monkeypatch):
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"""Force a tracked task to raise; assert error fields populated."""
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from backend.app.tasks.thumbnail import generate_thumbnail
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def _explode(*a, **k):
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raise ValueError("synthetic failure")
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monkeypatch.setattr(
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"backend.app.tasks.thumbnail.generate_thumbnail.run",
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_explode,
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)
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with pytest.raises(ValueError):
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generate_thumbnail.delay(999_997).get(propagate=True)
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row = db_sync.execute(
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select(
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TaskRun.status, TaskRun.error_type, TaskRun.error_message,
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TaskRun.finished_at,
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).where(TaskRun.target_id == 999_997)
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.order_by(TaskRun.id.desc()).limit(1)
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).one()
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status, error_type, error_message, finished_at = row
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assert status == "error"
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assert error_type == "ValueError"
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assert "synthetic failure" in (error_message or "")
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assert finished_at is not None
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@pytest.mark.asyncio
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async def test_soft_time_limit_records_timeout_status(db_sync, monkeypatch):
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from celery.exceptions import SoftTimeLimitExceeded
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from backend.app.tasks.thumbnail import generate_thumbnail
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def _timeout(*a, **k):
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raise SoftTimeLimitExceeded("simulated soft limit")
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monkeypatch.setattr(
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"backend.app.tasks.thumbnail.generate_thumbnail.run",
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_timeout,
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)
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with pytest.raises(SoftTimeLimitExceeded):
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generate_thumbnail.delay(999_996).get(propagate=True)
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status = db_sync.execute(
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select(TaskRun.status).where(TaskRun.target_id == 999_996)
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.order_by(TaskRun.id.desc()).limit(1)
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).scalar_one()
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assert status == "timeout"
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@pytest.mark.asyncio
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async def test_untracked_celery_internal_tasks_skip(db_sync):
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"""celery.chord_unlock is in the untracked list; firing it should
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NOT insert a task_run row."""
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before = db_sync.execute(select(func.count(TaskRun.id))).scalar_one()
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# Send a chord_unlock-style task via apply (no real task to dispatch).
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# The signal handler checks task.name against _UNTRACKED_TASK_NAMES;
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# if name is in the list, no row is inserted. We verify by firing
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# a regular task and asserting only ONE row appears, not two.
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from backend.app.tasks.thumbnail import generate_thumbnail
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generate_thumbnail.delay(999_995)
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after = db_sync.execute(select(func.count(TaskRun.id))).scalar_one()
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assert after - before == 1
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@pytest.mark.asyncio
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async def test_args_summary_truncated_to_255(db_sync, monkeypatch):
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"""Task with a very large repr(args); assert args_summary <= 255."""
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from backend.app.tasks.thumbnail import generate_thumbnail
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# Force a giant arg by patching repr(args) target — actually just
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# call with a large int that produces a long repr.
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big_id = int("9" * 200) # 200-char repr
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# The signal handler reads repr(args), so this naturally produces
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# a long args_summary that should get truncated to 255.
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try:
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generate_thumbnail.delay(big_id).get(timeout=5, propagate=False)
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except Exception:
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pass
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args_summary = db_sync.execute(
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select(TaskRun.args_summary)
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.where(TaskRun.task_name.endswith(".generate_thumbnail"))
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.order_by(TaskRun.id.desc()).limit(1)
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).scalar_one()
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assert args_summary is None or len(args_summary) <= 255
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@pytest.mark.asyncio
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async def test_error_message_truncated_to_2000(db_sync, monkeypatch):
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from backend.app.tasks.thumbnail import generate_thumbnail
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huge_message = "X" * 5000
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def _raise_huge(*a, **k):
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raise RuntimeError(huge_message)
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monkeypatch.setattr(
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"backend.app.tasks.thumbnail.generate_thumbnail.run", _raise_huge,
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)
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with pytest.raises(RuntimeError):
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generate_thumbnail.delay(999_994).get(propagate=True)
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error_message = db_sync.execute(
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select(TaskRun.error_message).where(TaskRun.target_id == 999_994)
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.order_by(TaskRun.id.desc()).limit(1)
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).scalar_one()
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assert error_message is not None
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assert len(error_message) <= 2000
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@pytest.mark.asyncio
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async def test_signal_handler_failure_does_not_break_task(db_sync, monkeypatch):
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"""Monkeypatch sync_session_factory in the signals module to raise;
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assert the task still returns its result and the worker doesn't
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propagate the signal-handler exception."""
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from backend.app.tasks.thumbnail import generate_thumbnail
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def _broken_factory():
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raise RuntimeError("db down")
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monkeypatch.setattr(
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"backend.app.celery_signals.sync_session_factory", _broken_factory,
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)
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# Task should still execute (no-op on missing image) without raising.
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result = generate_thumbnail.delay(999_993).get(timeout=5)
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assert result is not None # task ran; signal handler errors swallowed
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@pytest.mark.parametrize("args,expected", [
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((42,), 42),
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((42, "ignored"), 42),
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(("123",), 123),
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(("not-int",), None),
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((), None),
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(None, None),
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])
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def test_target_id_extracted_from_first_int_arg(args, expected):
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"""Unit test the helper directly; no DB needed."""
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from backend.app.celery_signals import _target_id_from_args
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assert _target_id_from_args(args) == expected
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def test_finalize_sets_retry_status_with_retry_count(db_sync):
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"""Direct unit-shape test of _finalize's retry path. We can't
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reliably trigger Celery's task_retry signal under eager mode with
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monkeypatched .run (the bind=True 'self' injection breaks), so
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test the finalize helper directly — that's the code the retry
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signal handler delegates to anyway."""
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from datetime import UTC, datetime
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from backend.app.celery_signals import _finalize
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from backend.app.models import TaskRun
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# Seed a 'running' row that _finalize can target.
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row = TaskRun(
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celery_task_id="retry-test-tid",
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queue="ml",
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task_name="backend.app.tasks.fake.t",
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target_id=999_992,
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started_at=datetime.now(UTC),
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status="running",
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)
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db_sync.add(row)
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db_sync.commit()
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_finalize(
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"retry-test-tid", status="retry",
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error_type="RuntimeError",
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error_message="first attempt",
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retry_count=1,
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)
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# Column-select assertions — _finalize mutated the row via its own
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# session; re-read fresh state through db_sync.
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db_sync.expire_all()
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status, retry_count, error_type = db_sync.execute(
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select(TaskRun.status, TaskRun.retry_count, TaskRun.error_type)
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.where(TaskRun.celery_task_id == "retry-test-tid")
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).one()
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assert status == "retry"
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assert retry_count == 1
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assert error_type == "RuntimeError"
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@pytest.mark.asyncio
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async def test_worker_hostname_recorded(db_sync):
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"""Sender's hostname should land in worker_hostname."""
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from backend.app.tasks.thumbnail import generate_thumbnail
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generate_thumbnail.delay(999_991)
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hostname = db_sync.execute(
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select(TaskRun.worker_hostname).where(TaskRun.target_id == 999_991)
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).scalar_one()
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# Under eager mode hostname may be None or "celery@local"; just
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# assert the column is touched (either string or None — never throws).
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assert hostname is None or isinstance(hostname, str)
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