如何在量角器/茉莉花测试中等待承诺？

Question

我正在学习 Protractor（以及 Protractor 使用的扩展 Jasmine），出于某种原因，我需要等待 Promise 才能继续测试。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，让我们添加一个简单的 Promise（ES6 风格），它什么都不做

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);
    });
  });
});

这行不通，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

我应该怎么做才能让它发挥作用？

Answer 1

我是通过以下方式解决的：

首先，使用 jasmine2 作为框架而不是 writin

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);

  });
});

Jasmine其实就是"chaining"expect together本身的promises，方便的解决了我的问题

如何在量角器/茉莉花测试中等待承诺？

How to wait for promise in protractor/ jasmine test?

javascript

jasmine

protractor

es6-promise