Test Runner--Karma 简单介绍

• Karma?

  官网是这么定义的:

  On the AngularJS team,we rely on testing and we always seek better tools to make our life easier.
  That's why we created Karma- a test runner that fits all our needs.
  

  简单的说，Karma是用来干什么的呢？

  The main goal for Karma is to bring a productive testing environment to developers.
  The environment being one where they don't have to set up loads of configurations,but rather a place
  where developers can just write the code and get instant feedback from their tests.
  Because getting quick feedback is what makes you productive and creative.
  

  总结下，Karma是一个测试运行器，它可以将开发，CI,产品等不同环境下测试所需要的配置管理起来。从而使程序员只专注于写测试本身。Karma可以是测试驱动开发更加的简单，高效，有趣。
  需要注意的是，Karma不是测试框架，也不是断言库。它只是能够启动一个HTTP服务器,依赖于测试框架，生成你可能已经知道的测试运行器的HTML文件。

• Karma(Testacular)

Karma在2013年前也叫Testacular.

如果你现在去搜索Testacular,会链接到Karma资源处。

• Karma Install

  Karma runs on Node.js and is available as an NPM package.

• Install Karma:

  $ npm install karma –save-dev

• Install plugins that your project needs:

  $ npm install karma-jasmine karma-chrome-launcher …… –save-dev

• configuration

  $ karma init my.conf.js
  

• Browsers
  
  the browsers configuration setting is empty by default.

• Preprocessors

• 
• $ npm install -g istanbul
• npm install karma karma-coverage –save-dev

• Plugins

• In fact, all the existing preprocessors, reporters, browser launchers and frameworks are also plugins.
• Installation (npm install karma-(plugin name) –save-dev)
• Loading Plugin

• start

• Run karma:

  $ ./node_modules/karma/bin/karma start my.conf.js

• Install Karma Commandline Interface:

  $ npm install -g karma-cli

$ karma start my.conf.js

• Grunt-Karma

  npm install grunt –save-dev
  npm install grunt-karma –save-dev

• Karma优缺点

  - Run tests from browsers or PhantomJS
  - Run on multiple clients at once
  - Supports multiple JavaScript test frameworks
  - Auto-run tests on save
  - Reporters
  - Plugins
  - Supported by IntelliJ and WebStorm
  - Open source
  ---
  - No plugin for Eclipse (yet)
  - No history of previous test results
  

• 更多地JavaScript Test Runner

• wallaby.js
• Chutzpah
• Buster.JS
• testem
• …….