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tests/integration/test_outbox_mysql.py

@@ -0,0 +1,74 @@
+from datetime import UTC, datetime
+from uuid import uuid4
+
+import pytest
+from sqlalchemy import delete, select
+
+from app.infrastructure.db import SessionFactory
+from app.model.platform import DomainEventOutbox, OutboxDelivery
+from app.worker.outbox_worker import OutboxWorker
+
+# 依赖真实 MySQL：必须打 integration marker，否则按 marker 过滤时会漏测这批用例。
+pytestmark = pytest.mark.integration
+
+
+@pytest.mark.asyncio
+async def test_duplicate_delivery_skips_handler_after_restart() -> None:
+    event_id = str(uuid4())
+    event_type = f"test.mysql.{uuid4().hex}"
+    now = datetime.now(UTC).replace(tzinfo=None)
+    calls = 0
+
+    async def handler(payload: dict[str, object]) -> None:
+        nonlocal calls
+        calls += 1
+
+    try:
+        async with SessionFactory() as session:
+            session.add(
+                DomainEventOutbox(
+                    event_id=event_id,
+                    event_type=event_type,
+                    aggregate_type="test",
+                    aggregate_id=event_id,
+                    trace_id=event_id,
+                    payload={"value": 1},
+                    status="pending",
+                    retry_count=0,
+                    occurred_at=now,
+                    created_at=now,
+                    updated_at=now,
+                )
+            )
+            await session.commit()
+
+        async with SessionFactory() as session:
+            assert await OutboxWorker(session, {event_type: handler}).publish_one()
+
+        async with SessionFactory() as session:
+            event = await session.scalar(
+                select(DomainEventOutbox).where(DomainEventOutbox.event_id == event_id)
+            )
+            assert event is not None
+            event.status = "pending"
+            event.published_at = None
+            await session.commit()
+
+        async with SessionFactory() as session:
+            assert await OutboxWorker(session, {event_type: handler}).publish_one()
+
+        assert calls == 1
+        async with SessionFactory() as session:
+            deliveries = list(
+                await session.scalars(
+                    select(OutboxDelivery).where(OutboxDelivery.event_id == event_id)
+                )
+            )
+            assert len(deliveries) == 1
+    finally:
+        async with SessionFactory() as session:
+            await session.execute(delete(OutboxDelivery).where(OutboxDelivery.event_id == event_id))
+            await session.execute(
+                delete(DomainEventOutbox).where(DomainEventOutbox.event_id == event_id)
+            )
+            await session.commit()