量角器和Cucumber.js:使用mocha的承诺,期望不能按预期工作

时间:2016-07-18 16:46:37

标签: angularjs cucumber protractor mocha chai-as-promised

我一直在尝试使用量角器和黄瓜来测试我的角度应用程序,但是当我使用mocha创建期望时,期望它是错误的,错误规范不会在控制台中显示。

路线http://localhost:9000/#/form29/form29'

的相关HTML
...

<h4 class="title">
  The title
</h4>

...

我的步骤文件是:

// form29_steps.js

var chai = require('chai'),
        chaiAsPromised = require('chai-as-promised'),
        assert;

chai.use(chaiAsPromised);
expect = chai.expect;

module.exports = function () {

    this.Given(/^I am in the form 29 page$/, function (done) {
      browser.get('http://localhost:9000/#/form29/form29');
      done();
    });

    this.Then(/^should be the title "(.*)"/,function(title, done){
        var el = element(by.css('.title'));

        el.getText().then(function(text){
            //a false expect
            expect(title).to.eq('Aaaaa');
            done();
        });

    });

}; 

当期望其有效时它是正常的,但是当期望失败时,没有预期失败的错误并显示以下内容:

[16:14:08] E/launcher - "process.on('uncaughtException'" error, see launcher
[16:14:08] E/launcher - Process exited with error code 199

当我尝试相同但不使用承诺时,这很有效

this.Then(/^should be the title "(.*)"/,function(title, done){
    var el = element(by.css('.title'));

    expect(title).to.eq('A');
    done(); 
});

我得到了我想要的错误:

Message:
     AssertionError: expected 'Formulario 29' to equal 'A'
         at World.<anonymous> (/protractor/test/e2e/features/step_definitions/form29_steps.js:18:20)
         at _combinedTickCallback (internal/process/next_tick.js:67:7)
         at process._tickCallback (internal/process/next_tick.js:98:9)

为什么会这样?

1 个答案:

答案 0 :(得分:2)

[16:14:08] E/launcher - "process.on('uncaughtException'" error, see launcher
[16:14:08] E/launcher - Process exited with error code 199

上述错误可能是由于与承诺有关的各种原因造成的。但它应该抛出正确的信息。此处https://github.com/angular/protractor/issues/3384已经提供了解决确切错误消息的解决方法。

您可以更改量角器依赖关系中的launcher.ts文件,如上述论坛中所述,以捕获错误以调试您的问题。