karma和Jenkins进行持续集成单元测试

单元测试一般不会只在本机执行，使用持续集成工具，每日进行自动化单元测试，对于JavaScript，需要在多个浏览器环境里执行，测试兼容性，我们需要知道多少测试用例没有通过，测试覆盖率等数据等。

1、参考文档
http://karma-runner.github.io/0.12/plus/jenkins.html
http://www.shenyanchao.cn/blog/2013/04/01/run-karma-in-jenkins-ci/

2、在Jenkins服务器上安装node.js
安装步骤参考

引用

http://powertech.iteye.com/blog/2051365

3、配置测试相关的插件
在项目目录下打开命令行，执行

npm karma-chrome-launcher #chrome浏览器插件
npm karma-firefox-launcher #firefox浏览器插件
npm karma-junit-reporter #junit 测试报告插件
npm karma-coverage #单元测试覆盖率插件

4、修改配置文件karma.conf.js
添加测试结果报告和单元测试覆盖率

module.exports = function(config) {
  config.set({
    // base path, that will be used to resolve files and exclude
    basePath: '.',

    frameworks: ['jasmine'],

    // list of files / patterns to load in the browser
    files: [
      'js/*.js'
    ],

    // list of files to exclude
    exclude: [
      'client/main.js'
    ],

    preprocessors: {
    	'js/*.js':'coverage'
    },
    
    coverageReporter:{
    	    type : 'cobertura',
    	    dir : 'coverage/'
    	},

    // use dots reporter, as travis terminal does not support escaping sequences
    // possible values: 'dots', 'progress'
    // CLI --reporters progress
    reporters: ['dots', 'junit','coverage'],

    junitReporter: {
      // will be resolved to basePath (in the same way as files/exclude patterns)
      outputFile: 'test-results.xml'
    },

    // web server port
    // CLI --port 9876
    port: 9876,

    // enable / disable colors in the output (reporters and logs)
    // CLI --colors --no-colors
    colors: true,

    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    // CLI --log-level debug
    logLevel: config.LOG_INFO,

    // enable / disable watching file and executing tests whenever any file changes
    // CLI --auto-watch --no-auto-watch
    autoWatch: true,

    // Start these browsers, currently available:
    // - Chrome
    // - ChromeCanary
    // - Firefox
    // - Opera
    // - Safari (only Mac)
    // - PhantomJS
    // - IE (only Windows)
    // CLI --browsers Chrome,Firefox,Safari
    //browsers: [process.env.TRAVIS ? 'Firefox' : 'Chrome'],
    browsers: ['IE'],

    // If browser does not capture in given timeout [ms], kill it
    // CLI --capture-timeout 5000
    captureTimeout: 20000,

    // Auto run tests on start (when browsers are captured) and exit
    // CLI --single-run --no-single-run
    singleRun: true,

    // report which specs are slower than 500ms
    // CLI --report-slower-than 500
    reportSlowerThan: 500,

    plugins: [
      'karma-jasmine',
      'karma-chrome-launcher',
      'karma-firefox-launcher',
      'karma-ie-launcher',
      'karma-junit-reporter',
      'karma-commonjs',
      'karma-coverage'
    ]
  });
};

其中junit report测试插件，会在当前项目目录下生成test-results.xml文件。
coverage覆盖率插件，会在当前目录下生成coverage目录，里面是覆盖率数据文件。

5、Jenkins安装插件
Jenkins Cobertura Plugin 测试覆盖率插件

6、在Jenkins上配置一个自由风格的任务
在源代码管理里，填写项目的SVN地址等，可以让Jenkins正常下载源码

7、构建命令
构建选Execute windows batch command

set Path=%Path%;D:\Program Files\nodejs\
set IE_BIN=C:\Program Files\Internet Explorer\iexplore.exe
node ./node_modules/karma/bin/karma start

8、测试选项
构建后操作

Publish Cobertura Coverage Report选项，
在Cobertura xml report pattern里填写

coverage/**/*.xml

Publish JUnit test result report选项
Test report XMLs里填写

test-results.xml

9、测试结果