karma.conf-base.js

var path = require('path')
var webpack = require('./webpack.config')

module.exports = {
  basePath: '',
  singleRun: true, //just run once by default
  frameworks: [ 'mocha' ], //use the mocha test framework
  plugins: [
    require('karma-webpack'),
    require('karma-mocha'),
    // require('karma-phantomjs-launcher'), // One can install this locally, if one so desires to speed things up
    require('karma-sourcemap-loader'),
    require('karma-mocha-reporter')
  ],
  files: [
    'tests.webpack.js'
  ],
  preprocessors: {
    'tests.webpack.js': [ 'webpack', 'sourcemap' ], //preprocess with webpack and our sourcemap loader
  },
  reporters: [ 'mocha' ],
  webpack: { //kind of a copy of your webpack config
    devtool: 'inline-source-map', //just do inline source maps instead of the default
    module: webpack.module,
    resolve: webpack.resolve
  },
  webpackServer: {
    noInfo: true //please don't spam the console when running in karma!
  }
}