add sync coverage tests

tests/test_db.py

@@ -122,6 +122,50 @@ class TestPersistenceServiceIntegration(unittest.TestCase):
         self.assertEqual(len(cars), 1)
         self.assertEqual(cars[0].origin_id, "NEW-ID")
 
+    def test_mark_sold_by_urls_marks_missing_records(self) -> None:
+        first = self._record("111")
+        second = self._record("222")
+        first.origin_id = "dubizzle:111"
+        second.origin_id = "dubizzle:222"
+        self.persistence.upsert_car(first)
+        self.persistence.upsert_car(second)
+
+        marked = self.persistence.mark_sold_not_in_listing_by_urls({first.origin_url})
+
+        self.assertEqual(marked, 1)
+        with self.persistence.session_scope() as session:
+            cars = {
+                car.origin_id: car
+                for car in session.execute(select(Car)).scalars().all()
+            }
+
+        self.assertFalse(cars["dubizzle:111"].is_sold)
+        self.assertTrue(cars["dubizzle:222"].is_sold)
+
+    def test_upsert_reactivates_previously_sold_car(self) -> None:
+        record = self._record("333", price=1000)
+        record.origin_id = "dubizzle:333"
+        self.persistence.upsert_car(record)
+        self.persistence.mark_sold_not_in_listing_by_urls({"https://www.dubizzle.com/VehicleDetail/other~US"})
+
+        with self.persistence.session_scope() as session:
+            sold_car = session.execute(
+                select(Car).where(Car.origin_id == "dubizzle:333")
+            ).scalar_one()
+        self.assertTrue(sold_car.is_sold)
+
+        revived = self._record("333", price=1500)
+        revived.origin_id = "dubizzle:333"
+        self.persistence.upsert_car(revived)
+
+        with self.persistence.session_scope() as session:
+            active_car = session.execute(
+                select(Car).where(Car.origin_id == "dubizzle:333")
+            ).scalar_one()
+
+        self.assertFalse(active_car.is_sold)
+        self.assertEqual(active_car.price, 1500)
+
 
 if __name__ == "__main__":
     unittest.main()