在量角器cucumber中，getAttribute(值)返回Object (browser_，then，...)而不是返回数据

Question

尝试断言在以下网页值(‘getAttribute’)中输入的日期时，返回"Object (browser_，then，...)“而不是价值。https://material.angular.io/components/datepicker/examples

下面是给出错误的代码片段

expect(element(by.xpath('//input[@id="mat-input-2"]')).getAttribute('value')).to.eventually.equal(element(by.xpath('//input[@id="mat-input-2"]')).getAttribute('value')).and.notify(callback);

为此，我得到以下错误对象:期望'1/6/2019‘等于{AssertionError (browser_，then，...) }

     var date=element(by.xpath('//input[@id="mat-input-2"]')).getAttribute('value').getText();
  console.log(date);

上面代码的console.log返回的内容如下所示。

ElementFinder {
browser_:
  ProtractorBrowser {
 controlFlow: [Function],
 schedule: [Function],
 setFileDetector: [Function],
 getExecutor: [Function],
 getSession: [Function],
 getCapabilities: [Function],
 quit: [Function],
 actions: [Function],
 touchActions: [Function],
 executeScript: [Function],
 executeAsyncScript: [Function],
 call: [Function],
 wait: [Function],
 sleep: [Function],
 getWindowHandle: [Function],
 getAllWindowHandles: [Function],
 getPageSource: [Function],
 close: [Function],
 getCurrentUrl: [Function],
 getTitle: [Function],
 findElementInternal_: [Function],
 findElementsInternal_: [Function],
 takeScreenshot: [Function],
 manage: [Function],
 switchTo: [Function],
 driver:
  Driver {
    flow_: [ControlFlow],
    session_: [ManagedPromise],
    executor_: [Executor],
    fileDetector_: null,
    onQuit_: undefined,
    getNetworkConnection: [Function],
    setNetworkConnection: [Function],
    toggleAirplaneMode: [Function],
    toggleWiFi: [Function],

请提供一些解决方案

Answer 1

试一试：

const elementOne = element(by.xpath('//input[@id="mat-input-2"]');
const elementTwo = element(by.xpath('//input[@id="mat-input-2"]');

return elementOne.getAttribute('value').then((elementOneValue) => {
    return expect(elementTwo.getAttribute('value')).to.eventually.equal(elementOneValue).and.notify(callback);
});

顺便说一句。这两个元素有相同的选择器-它们必须相等。