karma.conf.js

var path = require('path')
// Karma configuration
// node_modules/.bin/karma start --single-run
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: ['mocha'],


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

    // 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/test.js': ['webpack']
    },

    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['progress', 'coverage'],


    // 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: true,


    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['Firefox'],

    webpack: {
      module: {
        loaders: [
          { test: /\.html$/, loader: 'html-loader' }
        ],
        preLoaders: [
          // instrument only testing sources with Istanbul
          {
            test: /index\.js$/,
            exclude: [path.resolve('test'), path.resolve('node_modules'), path.resolve('example')],
            loader:'istanbul-instrumenter'
          }
        ]
      }
    },

    webpackMiddleware: {
        noInfo: true
    },
    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false,
    coverageReporter: {
      dir: 'coverage/',
      reporters: [
        { type: 'text' },
        { type: 'html', subdir: 'html' },
        { type: 'lcovonly', subdir: 'lcov' },
        { type: 'cobertura', subdir: 'cobertura' }
      ]
    }
  });
};