decomposer: generate deliverable files for Define the service contract and project architecture for the FastAPI endpoint monitoring service.; Implement the typed monitor CRUD API and concurrency-safe in-memory state according to the service design.; Implement secure on-demand endpoint checks with status updates, latency measurement, robust error handling, and redacted structured logs.; Add operational API endpoints and environment-driven runtime configuration to the monitoring service.; Create automated tests for the monitoring service.; Package the service with Docker and developer documentation.; Validate the complete project.

tests/test_store.py

@@ -1,38 +1,15 @@
-import asyncio
+import pytest
 
-from app.models import CheckStatus, MonitorCreate, MonitorUpdate
+from app.models import CheckResult, MonitorCreate, MonitorStatus, utcnow
 from app.store import MonitorStore
 
-
-async def test_concurrent_creates_are_not_lost():
-    store = MonitorStore()
-    await asyncio.gather(*[
-        store.create(MonitorCreate(name=f"m-{index}", url="https://example.com"))
-        for index in range(100)
-    ])
-    items = await store.list()
-    assert len(items) == 100
-    assert len({item.id for item in items}) == 100
+pytestmark = pytest.mark.anyio
 
 
-async def test_stale_check_cannot_overwrite_updated_monitor():
-    store = MonitorStore()
-    item = await store.create(MonitorCreate(name="before", url="https://example.com"))
-    old = await store.snapshot(item.id)
-    assert old is not None
-    await store.update(item.id, MonitorUpdate(name="after"))
-    applied = await store.apply_status(item.id, old.revision, CheckStatus(state="up"))
-    assert applied is False
-    current = await store.snapshot(item.id)
-    assert current is not None
-    assert current.monitor.name == "after"
-    assert current.monitor.status.state == "unknown"
-
-
-async def test_delete_wins_over_in_flight_check():
+async def test_deleted_monitor_is_not_resurrected_by_late_result():
     store = MonitorStore()
     item = await store.create(MonitorCreate(name="x", url="https://example.com"))
-    snapshot = await store.snapshot(item.id)
-    assert snapshot is not None
-    await store.delete(item.id)
-    assert await store.apply_status(item.id, snapshot.revision, CheckStatus(state="up")) is False
+    assert await store.delete(item.id)
+    result = CheckResult(status=MonitorStatus.up, checked_at=utcnow(), latency_ms=1, http_status=200)
+    assert await store.record(item.id, result) is None
+    assert await store.get(item.id) is None