M54: harden operations and demo resilience

backend/tests/test_dashboard.py

@@ -1,3 +1,9 @@
+from sqlalchemy import select
+
+from app.core.db import SessionLocal
+from app.models.vehicle import Vehicle
+
+
 def test_dashboard_metrics_are_persisted_counts(ops_client):
     response = ops_client.get("/api/v1/dashboard")
     assert response.status_code == 200
@@ -15,6 +21,43 @@ def test_dashboard_metrics_are_persisted_counts(ops_client):
     assert metrics["pending_or_failed_workflows"] >= 1
 
 
+def test_dashboard_metrics_change_when_persisted_fleet_data_changes(ops_client):
+    before = ops_client.get("/api/v1/dashboard").json()["metrics"]
+    db = SessionLocal()
+    probe = Vehicle(
+        public_ref="MO-METRIC-PROBE",
+        make="Synthetic",
+        model="Metric probe",
+        model_year=2026,
+        registration_number="TEST-METRIC-PROBE",
+        location="Test fixture",
+        operational_status="blocked",
+        odometer_km=0,
+        next_service_km=1,
+        active=True,
+        version=1,
+    )
+    try:
+        db.add(probe)
+        db.commit()
+
+        after_response = ops_client.get("/api/v1/dashboard")
+        assert after_response.status_code == 200
+        after = after_response.json()["metrics"]
+        assert after["blocked"] == before["blocked"] + 1
+        fleet_statuses = ("available", "rented", "cleaning", "maintenance", "blocked")
+        assert (
+            sum(after[status] for status in fleet_statuses)
+            == sum(before[status] for status in fleet_statuses) + 1
+        )
+    finally:
+        persisted_probe = db.scalar(select(Vehicle).where(Vehicle.public_ref == "MO-METRIC-PROBE"))
+        if persisted_probe is not None:
+            db.delete(persisted_probe)
+            db.commit()
+        db.close()
+
+
 def test_dashboard_attention_items_link_to_records(ops_client):
     response = ops_client.get("/api/v1/dashboard")
     body = response.json()