如何在量角器/茉莉花测试中等待诺言？

Question

我正在学习有关量角器（并由此扩展为量角器使用的茉莉花），出于某种原因，我需要等待Promise继续测试。 但是，我不确定该怎么做。

让我们从Protractor教程中获取代码并添加一些代码，然后添加一个不执行任何操作的简单Promise（采用ES6样式）

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);
    });
  });
});

这是行不通的，因为这就是答案

$ 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

我应该怎么做才能使其正常工作？

Answer 1

我通过以下方式解决了它：

• 首先，使用jasmine2作为框架，而不使用writin的jasemine

framework: 'jasmine2'

到conf.js

• 像这样编辑文件

   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); }); }); 

茉莉花实际上是将期望中的承诺“链接”在一起，很方便地解决了我的问题。