fix: 采购价格上限按数量计算总价 (#181)

client/test/test_purchase_task_service.py

@@ -251,18 +251,19 @@ class PurchaseTaskServiceTest(unittest.TestCase):
 
         self.assertEqual(observed, [("PUR-STARTED", TaskStatus.RUNNING)])
 
-    def test_price_above_limit_stops_before_confirmation(self):
+    def test_order_total_above_limit_stops_on_confirmation(self):
         self._prepare_task()
         adapter = RecordingDryRunAdapter(price_cent=5001)
 
         outcome = self._service(adapter).execute_one_local()
 
         self.assertEqual(outcome.kind, "task_failed")
-        self.assertNotIn(("enter_confirmation",), adapter.calls)
+        self.assertIn(("enter_confirmation",), adapter.calls)
         detail = self.repository.get_task("PUR-001")
         assert detail is not None
         self.assertEqual(detail.status, TaskStatus.FAILED)
         self.assertEqual(detail.last_error_code, "PURCHASE_PRICE_EXCEEDED")
+        self.assertIn("订单总价", detail.last_error_message)
 
     def test_unavailable_goods_stops_before_specs_and_is_not_retryable(self):
         self._prepare_task()