karma.conf.js

'use strict'

module.exports = function(config) {
  config.set({
    basePath: '',

    frameworks: ['mocha'],

    files: ['test/**/*.spec.js'],

    preprocessors: {
      'test/**/*.spec.js': ['webpack','sourcemap']
    },

    webpack: {
      devtool: 'inline-source-map',
      module: {
        loaders: [
          {
            test: /\.jsx?$/,
            exclude: /(node_modules|bower_components)/,
            loader: 'babel',
            query: {
              presets: ['es2015']
            }
          }
        ]
      }
    },

    reporters: ['mocha'],

    port: 9876,

    colors: true,

    logLevel: config.LOG_INFO,

    autoWatch: true,

    browsers: ['Chrome'],

    singleRun: false,

    concurrency: Infinity
  })
}