karma.conf.js

module.exports = function (config) {
  'use strict';
  let configuration = {

    basePath: '',

    frameworks: ['jasmine'],

    files: [
      './public/components/button.js',
      './public/components/form.js',
      './public/components/menu.js',
      './public/components/message.js',
      './public/components/scoreboard.js',
      './public/modules/**/*.js',
      './public/views/**/*.js',
      './test/**/*.spec.js'
    ],

    reporters: ['progress', 'coverage', 'spec'],
    preprocessors: {
      './public/components/**/*.js': ['coverage'],
      './public/modules/**/*.js': ['coverage'],
      './public/views/**/*.js': ['coverage']
    },

    port: 9876,
    colors: true,
    autoWatch: false,
    singleRun: false,

    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,
    plugins: [
      'karma-jasmine',
      'karma-chrome-launcher',
      'karma-coverage',
      'karma-spec-reporter'
    ],
    browsers: ['Chrome'],
    customLaunchers: {
      Chrome_travis_ci: {
        base: 'Chrome',
        flags: ['---no-sandbox']
      }
    },
    coverageReporter: {
      type: 'html',
      dir: 'public/coverage/'
    }
  };

  if (process.env.TRAVIS) {
    configuration.browsers = ['Chrome_travis_ci']
  }

  config.set(configuration)
};