乐友-完善取流水号函数测试

test/TestRefill.php

@@ -5350,6 +5350,7 @@ class TestRefill extends TestCase
         $watorno2 = $this->Leyou_Waterno_By_Voucher('【中国石化】您尾号为211884的加油卡于08月30日 13时59分充值成功,金额50元,订单号1623083013592106');
         $watorno3 = $this->Leyou_Waterno_By_Voucher('【中国石化】您尾号为211884的加油卡于08月30日 13时59分充值成功,金额50元,订单号');
         $watorno4 = $this->Leyou_Waterno_By_Voucher('');
+        $watorno4 = $this->Leyou_Waterno_By_Voucher(null);
     }
 
     private function Leyou_Waterno_By_Voucher($voucher):string {