karma.conf.js

var webpackConfig = require('./webpack.config.js');

module.exports = function (config){
  config.set({
    // Which browsers we want to run on
    browsers: ['Chrome'],
    singleRun: true,
    // Karma test runner will use mocha to run tests
    frameworks: ['mocha'],
    // Need to load common bundle files before the tests
    // Run all files that end in .test.jsx in folders under app/tests
    // files: ['dist/vendor.bundle.js','dist/index.bundle.js','src/tests/**/*.test.jsx'],
    files: ['src/client/tests/**/*.test.jsx'],
    // Here "webpack" enables to use webpack modules on the tests
    // "sourcemap" enables to use the .jsx files and not the bundles
    preprocessors: {
      'src/client/tests/**/*.test.jsx': ['webpack', 'sourcemap']
    },
    // How to format the result of the tests
    reporters: ['mocha'],
    // Timeout condition for failure
    client: {
      mocha: {
        timeout: '5000'
      }
    },
    webpack: webpackConfig,
    webpackServer: {
      noInfo: true
    }

  });
};