如何使用Jasmine和CucumberJS与量角器 [英] How to use Jasmine and CucumberJS with Protractor

问题描述

我想使用量角器，CucumberJS和Jasmine来测试我的项目。如何使用Jasmine和CucumberJS与量角器？以下是我创建的项目设置：

I'm looking to use Protractor, CucumberJS, and Jasmine for testing my project. How do I use both Jasmine and CucumberJS with Protractor? Here's the project setup I've created:

/ path / to / myproj / protractor.conf.js

/path/to/myproj/protractor.conf.js

exports.config = {
  seleniumServerJar: 'node_modules/protractor/selenium/selenium-server-standalone-2.45.0.jar',

  specs: [
    'features/*.feature'
  ],

  baseUrl: 'http://localhost:8080',

  multiCapabilities: [
    {
      'browserName': 'chrome'
    }
  ],

  allScriptsTimeout: 380000,
  getPageTimeout: 20000,

  framework: 'cucumber',

  cucumberOpts: {
    require: 'features/stepDefinitions.js',
    format: 'summary'
  }
};

正如你所看到的，这个项目使用cucumber作为框架。如何在CucumberJS旁边的Jasmine框架中添加？这是通过Protractor配置文件还是代码中的其他位置？

As you can see, this project uses "cucumber" as the framework. How do I add in the Jasmine framework alongside CucumberJS? Would this be through the Protractor configuration file or someplace else in the code?

/ path / to / myproj / features / demo.feature / p>

/path/to/myproj/features/demo.feature

Feature: Some terse yet descriptive text of what is desired

  Scenario: Some determinable business situation
    Given some precondition

/ path / to / myproj / features / stepDefinitions.js

/path/to/myproj/features/stepDefinitions.js

module.exports = function() {
  this.Given(/^some precondition$/, function (callback) {
    expect(true).toEqual(true);
    callback();
  });
};

执行此操作时，未定义expect，可能是因为Jasmine尚未集成，它期待全球随着它。以下是完整的错误讯息：

When this is executed, "expect" is not defined, presumably because Jasmine has not been integrated, and it's expect global along with it. Here's the full error message:

$ $(npm bin)/protractor protractor.conf.js 
Starting selenium standalone server...
[launcher] Running 1 instances of WebDriver
Selenium standalone server started at http://192.168.1.115:59957/wd/hub
(::) failed steps (::)

ReferenceError: expect is not defined
  at World.<anonymous> (/path/to/myproj/features/stepDefinitions.js:3:5)
  at process._tickCallback (node.js:355:11)


Failing scenarios:
/path/to/myproj/features/demo.feature:3 # Scenario: Some determinable business situation

1 scenario (1 failed)
1 step (1 failed)
Shutting down selenium standalone server.
[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

/ path / to / myproj / .json

/path/to/myproj/package.json

{
  "name": "myproj",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "cucumber": "0.4.9",
    "protractor": "git+https://github.com/angular/protractor.git#0262268fa43b9eefac815d986740efa07bb15818"
  }
}

注意：我使用一个特定的提交到量角器Git因为最新版本（2.1.0）有错误

Note: I'm using a particular commit to the Protractor Git repository in my package.json, because the latest version (2.1.0) has a bug, which prevents integration with CucumberJS.

推荐答案

CucumberJS和Jasmine是互斥的;你将无法使用Jasmine的期望在黄瓜步骤。你需要做的是加载一个单独的期望模块。我建议 Chai 使用 chai-as-promised 插件。 （chai-as-promised）简化了围绕promises编写期望的过程.Practractor重写了Jasmine中的 expect（）函数，我们希望在您的世界中这样做，因为这是在您的步骤定义中提供访问的最简单的方法。您的世界将如下所示：

CucumberJS and Jasmine are mutually exclusive; you won't be able to use Jasmine's expects in Cucumber steps. What you have to do instead is load a separate expectation module. I would suggest Chai with the chai-as-promised plugin. (chai-as-promised simplifies the process of writing expectations around promises. Protractor overrides the expect() function in Jasmine to do this for you behind the scenes) Most likely you'll want to do this in your World as that's the easiest way to provide access to it in your Step Definitions. Your World would look something like this:

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

World = function World(callback) {
  chai.use(chaiAsPromised);
  this.expect = chai.expect;
  callback();
}

module.exports.World = World;

然后在您的步骤定义文件中，您只需按照 CucumberJS文档，您的步骤定义将限定为提供对世界的所有属性的访问：

Then in your Step Definitions file you just load in the World per the CucumberJS documentation and you're Step Definitions will be scoped to provide access to all properties of the World:

module.exports = function() {

  this.World = require("path/to/world.js").World;

  this.Given(/^some precondition$/, function (callback) {
    this.expect(true).to.equal(true);
    callback();
  });
};

现在，对于一些无耻的自我宣传：如果你使用量角器与CucumberJS，看看我帮助构建的模块，名为 CukeFarm 。它预先配置了几个模块，你会发现有用的，它提供了一些一般的步骤定义，可以用于大多数任何项目。

Now, for some shameless self-promoting: if you're using Protractor with CucumberJS, I would recommend looking at a module I helped build called CukeFarm. It comes preconfigured with a few modules you'll find useful and it provides a number of general Step Definitions that can be used on most any project.

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