量角器中的 defer.reject() 不顯示堆棧跟蹤？ 也就是說，我不知道代碼的哪一行

Question

我使用 defer.rejct() 作為錯誤處理方法。 但是，當它拋出失敗時，它沒有顯示堆棧跟蹤。 是否有一種簡單的方法可以使用 promise 在量角器中捕獲異常？

function formatPoolRecordsGridData(row) {
var defer = protractor.promise.defer();
switch (record.poolLevelRecordType) {
    case "A":
       <do something here>
       break;
    default:
        //Error Handling
        defer.reject('There is no matched record type');
        break;
}
//There is no way to say which line of the code it is failed
        Message:
        Failed: There is no matched record type
      Stack:
        Error: Failed: There is no matched record type
            at /usr/local/lib/node_modules/protractor/node_modules/jasminewd2/index.js:101:16
            at Promise.invokeCallback_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:1329:14)
            at TaskQueue.execute_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2790:14)
            at TaskQueue.executeNext_ (/usr/local/lib/node_modules/protractor/node_modules/selenium-webdriver/lib/promise.js:2773:21)

Answer 1

錯誤對象只會捕獲對調試有用的堆棧跟蹤

Reject只會拒絕promise並調用對應的fail方法

拒絕錯誤對象，它只會捕獲堆棧 trace.ex：

reject(new Error("There is no matched record type"));