radiomanifest.js/karma.config.js

module.exports = function (config) {
  config.set({
    frameworks: ['mocha'],
    // plugins: ['karma-webpack', 'karma-mocha', 'karma-chai-as-promised'],
    webpack: {
      // karma watches the test entry points
      // Do NOT specify the entry option
      // webpack watches dependencies

      // webpack configuration
    },
    preprocessors: {
      'test/**/*.js': ['webpack'],
      'radiomanifest.js': ['webpack']
    },
    files: [
      'radiomanifest.js',
      'test/**/*.js'
    ],
    reporters: ['progress'],
    port: 9876, // karma web server port
    colors: true,
    logLevel: config.LOG_INFO,
    browsers: ['ChromeHeadless', 'FirefoxHeadless'],
    autoWatch: false,
    concurrency: Infinity,
    customLaunchers: {
      FirefoxHeadless: {
        base: 'Firefox',
        flags: ['-headless']
      }
    }
  })
}