karma.conf.js

const puppeteer = require('puppeteer');
if (puppeteer.executablePath().indexOf('/home/ukrbublik/') == 0) {
  // ignore for my local dev
} else {
  process.env.CHROME_BIN = puppeteer.executablePath();
}
process.env.TZ = 'Etc/UTC';
process.env.BABEL_ENV = 'test'; // Set the proper environment for babel

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['mocha', 'chai', 'es6-shim'],
    plugins: [
      'karma-mocha',
      'karma-chai',
      'karma-es6-shim',
      'karma-chrome-launcher',
      'karma-sourcemap-loader',
      'karma-webpack',
      'karma-mocha-reporter',
      'karma-coverage',
    ],

    files: [
      {
        pattern: 'karma.tests.js',
        watched: true,
        served: true,
        included: true,
      },
    ],
    exclude: [],
    preprocessors: {
      'karma.tests.js': ['webpack', 'sourcemap'],
      'modules/**/*': ['coverage']
    },
    webpack: require('./webpack-test.config'),
    webpackMiddleware: {
      stats: 'errors-only'
    },

    reporters: ['progress', 'coverage'],

    coverageReporter: {
      dir: 'coverage',
      reporters: [
          { type: 'html', subdir: 'html' },
          { type: 'text-summary' },
          { type: 'lcov' }
      ],
      includeAllSources: true,
      instrumenterOptions: {
          istanbul: { noCompact: true }
      }
  },

    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: false,
    browsers: ['ChromeHeadlessNoSandbox'],
    customLaunchers: {
      ChromeHeadlessNoSandbox: {
        base: 'ChromeHeadless',
        flags: ['--no-sandbox']
      }
    },
    singleRun: true,
    concurrency: 1
  })
}