在量角器黄瓜中，getAttribute(Value) 返回 Object (browser_, then, ...) 而不是返回数据

Question

在尝试断言在以下网页中输入的日期时 getAttribute('value') 返回 "Object (browser_, then, ...)" 而不是 value 。 https://material.angular.io/components/datepicker/examples

以下是错误代码的sn-p

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，我收到以下错误 AssertionError: 预期 '1/6/2019' 等于 { Object (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 正在返回类似这样的内容。

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],

请为此提供一些解决方案

Answer 1

试试看：

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。两个元素都有相同的选择器——它们必须相等。