title: do not able to execute karma unit test in PhantomJS browser
body: <p>In grunt we execute unit test in PhantomJs by following ways.</p>
  
  <pre><code>karma: {
          options: {
      configFile: 'karma.conf.js',
      runnerPort: 9876,
      browsers: ['Chrome']
      },
  unitTestDev: {
          browsers: ['PhantomJS'],
          singleRun: true
       }
  }
  
  grunt.registerTask('unitTest',['karma:unitTestDev']);
  </code></pre>
  
  <p>Here is karma.conf.js file.</p>
  
  <pre><code>    // Karma configuration
  // Generated on Thu Apr 03 2014 13:44:39 GMT-0500 (Central Daylight Time)
  
  module.exports = function(config) {
    config.set({
  
      // base path that will be used to resolve all patterns (eg. files, exclude)
      basePath: '',
  
  
      // frameworks to use
      // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
      frameworks: ['jasmine'],
  
  
      // list of files / patterns to load in the browser
      files: [
          {pattern: 'dist/lib/jquery/dist/jquery.js', watched: false, served: true, included: true},
          {pattern: 'dist/lib/jasmine-jquery/lib/jasmine-jquery.js', watched: false, served: true, included: true},
          {pattern: 'dist/lib/angular/angular.js', watched: false, served: true, included: true},
          {pattern: 'dist/lib/angular-route/angular-route.min.js', watched: false, served: true, included: true},
          {pattern: 'dist/lib/angular-mocks/angular-mocks.js', watched: false, served: true, included: true},
  
          {pattern: 'dist/main.min.js', watched: false, served: true, included: true},
  
          {pattern: 'public/test/unit/**/*Spec.js', watched: false, served: true, included: true},
  
          // fixtures
          {pattern: 'public/test/mock/**/*.json', watched: true, served: true, included: false}
      ],
  
  
      // list of files to exclude
      exclude: [
  
      ],
  
  
      // preprocess matching files before serving them to the browser
      // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
      preprocessors: {
  
      },
  
  
      // test results reporter to use
      // possible values: 'dots', 'progress'
      // available reporters: https://npmjs.org/browse/keyword/karma-reporter
      reporters: ['progress', 'html', 'junit', 'story'],
  
      htmlReporter: {
        outputDir: 'build/unit-test/html-report',
        templatePath: 'node_modules/karma-html-reporter/jasmine_template.html'
      },
  
      junitReporter: {
        outputFile: 'build/unit-test/junit-report/test-results.xml',
        suite: ''
      },
  
      // web server port
      port: 9876,
  
  
      // enable / disable colors in the output (reporters and logs)
      colors: true,
  
  
      // level of logging
      // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
      logLevel: config.LOG_INFO,
  
  
      // enable / disable watching file and executing tests whenever any file changes
      autoWatch: false,
  
  
      // start these browsers
      // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
      browsers: ['Chrome'],
  
      // Continuous Integration mode
      // if true, Karma captures browsers, runs the tests and exits
      singleRun: false
       });
      };
  </code></pre>
  
  <p>When execute "karma:unitTestDev" command, then getting following errors.</p>
  
  <pre><code>Running "karma:unitTestDev" (karma) task
  INFO [karma]: Karma v0.11.14 server started at http://localhost:9876/
  INFO [launcher]: Starting browser PhantomJS
  ERROR [launcher]: Cannot start PhantomJS
      Error: spawn OK
  INFO [launcher]: Trying to start PhantomJS again (1/2).
  ERROR [launcher]: Cannot start PhantomJS
      Error: spawn OK
  INFO [launcher]: Trying to start PhantomJS again (2/2).
  ERROR [launcher]: Cannot start PhantomJS
      Error: spawn OK
  ERROR [launcher]: PhantomJS failed 2 times (cannot start). Giving up.
  Warning: Task "karma:unitTestDev" failed. Use --force to continue.
  
  Aborted due to warnings.
  </code></pre>
  
  <p>We are getting above issue in Windows and Linux OS. In Mac, karma successfully execute tests on PhantomJS.</p>
  
  <p>In windows, If we execute above test in Chrome browser, instead of PhantomJS, then karma successfully execute all unit tests.</p>
  
  <p>Here are karma related dependencies in Package.json</p>
  
  <pre><code>"phantomjs": "~1.9.7-3",
  "karma": "~0.12.3",
  "karma-chrome-launcher": "~0.1.3",
  "karma-jasmine": "~0.1.5",
  "karma-html-reporter": "~0.2.3",
  "karma-junit-reporter": "~0.2.1",
  "grunt-karma": "~0.8.2",
  "karma-phantomjs-launcher": "~0.1.3"
  </code></pre>
  
  <p>Let me know if are there any known issue in karma or grunt with PhantomJS. </p>