karma.conf.js

const path = require('path');

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['mocha', 'sinon-chai', 'phantomjs-shim'],
    files: [
      // Polyfills for PhantomJS in React 16.
      require.resolve('core-js/es6/map'),
      require.resolve('core-js/es6/set'),
      'src/__tests__/**/*.js',
    ],
    preprocessors: {
      [path.join(
        path.dirname(require.resolve('core-js/package.json')),
        'es6/**/*.js' // eslint-disable-line prettier/prettier
      )]: ['webpack'],
      'src/__tests__/**/*.js': ['webpack'],
    },
    webpack: {
      cache: true,
      module: {
        loaders: [
          {
            test: /\.jsx?$/,
            enforce: 'pre',
            include: path.resolve('src/__tests__/'),
            loader: 'babel-loader',
          },
          {
            test: /\.jsx?$/,
            include: path.resolve('src/'),
            enforce: 'pre',
            exclude: /(__tests__|__mocks__)/,
            loader: 'isparta-loader?babel-loader',
          },
          {
            test: /\.jsx?$/,
            exclude: [/node_modules/],
            loader: 'babel-loader',
          },
          {
            test: /\.css$/,
            loader: 'style-loader!css-loader',
          },
        ],
      },
      resolve: {
        modules: [
          path.join(__dirname, 'node_modules'),
          path.join(__dirname, 'src'),
        ],
        extensions: ['.js', '.jsx'],
      },
    },
    webpackServer: {
      quiet: false,
      noInfo: true,
      stats: {
        assets: false,
        colors: true,
        version: false,
        hash: false,
        timings: false,
        chunks: false,
        chunkModules: false,
      },
    },
    exclude: [],
    port: 8080,
    logLevel: config.LOG_INFO,
    colors: true,
    autoWatch: false,
    browsers: ['PhantomJS'],
    reporters: ['mocha', 'coverage'],
    browserNoActivityTimeout: 60000,
    plugins: [
      'karma-coverage',
      'karma-mocha',
      'karma-mocha-reporter',
      'karma-phantomjs-launcher',
      'karma-phantomjs-shim',
      'karma-sinon-chai',
      'karma-webpack',
    ],
    coverageReporter: {
      type: 'text',
    },
    browserConsoleLogOptions: {
      level: 'log',
      format: '%b %T: %m',
      terminal: true
    },
    captureTimeout: 100000,
    singleRun: true,
  });
};