如何在量角器/茉莉花測試中等待諾言？

Question

我正在學習有關量角器（並由此擴展為量角器使用的茉莉花），出於某種原因，我需要等待Promise繼續測試。 但是，我不確定該怎么做。

讓我們從Protractor教程中獲取代碼並添加一些代碼，然后添加一個不執行任何操作的簡單Promise（采用ES6樣式）

describe('angularjs homepage todo list', function() {
  it('should add a todo', function() {
    browser.get('https://angularjs.org');

    element(by.model('todoList.todoText')).sendKeys('write first protractor test');
    element(by.css('[value="add"]')).click();

    var todoList = element.all(by.repeater('todo in todoList.todos'));

    Promise.resolve().then( () => {
      expect(todoList.count()).toEqual(3);
      expect(todoList.get(2).getText()).toEqual('write first protractor test');

      // You wrote your first test, cross it off the list
      todoList.get(2).element(by.css('input')).click();
      var completedAmount = element.all(by.css('.done-true'));
      expect(completedAmount.count()).toEqual(2);
    });
  });
});

這是行不通的，因為這就是答案

$ protractor conf.js
Using the selenium server at http://localhost:4444/wd/hub
[launcher] Running 1 instances of WebDriver
F

Failures:

  1) angularjs homepage todo list should add a todo
   Message:
     Error while waiting for Protractor to sync with the page: "angular could not be found on the window"
   Stacktrace:
     undefined

Finished in 0.212 seconds
1 test, 1 assertion, 1 failure

[launcher] 0 instance(s) of WebDriver still running
[launcher] chrome #1 failed 1 test(s)
[launcher] overall: 1 failed spec(s)
[launcher] Process exited with error code 1

我應該怎么做才能使其正常工作？

Answer 1

我通過以下方式解決了它：

• 首先，使用jasmine2作為框架，而不使用writin的jasemine

framework: 'jasmine2'

到conf.js

• 像這樣編輯文件

   var flow = browser.flow() describe('angularjs homepage todo list', function() { it('should add a todo', function() { browser.get('https://angularjs.org'); element(by.model('todoList.todoText')).sendKeys('write first protractor test'); element(by.css('[value="add"]')).click(); var todoList = element.all(by.repeater('todo in todoList.todos')); flow.execute(function(){Promise.resolve()}); // or, more ES6-y version // flow.execute(() => Promise.resolve()); expect(todoList.count()).toEqual(3); expect(todoList.get(2).getText()).toEqual('write first protractor test'); // You wrote your first test, cross it off the list todoList.get(2).element(by.css('input')).click(); var completedAmount = element.all(by.css('.done-true')); expect(completedAmount.count()).toEqual(2); }); }); 

茉莉花實際上是將期望中的承諾“鏈接”在一起，很方便地解決了我的問題。