karma.conf.js

var path = require('path');

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

var ENV = process.env.npm_lifecycle_event;
var isTestWatch = ENV === 'test-watch';

module.exports = function (config) {
  var _config = {

    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',

    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['jasmine'],

    // list of files / patterns to load in the browser
    files: [
      { pattern: './.config/karma-shim.js', watched: false }
    ],

    // list of files to exclude
    exclude: [],

    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      './.config/karma-shim.js': ['webpack', 'sourcemap']
    },

    webpack: webpackConfig,

    webpackMiddleware: {
      // webpack-dev-middleware configuration
      // i. e.
      stats: 'errors-only'
    },

    webpackServer: {
      noInfo: true // please don't spam the console when running in karma!
    },

    // test results reporter to use
    // possible values: 'dots', 'progress', 'mocha'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['mocha', 'coverage', 'remap-coverage'],

    coverageReporter: {
        type: 'in-memory'
    },

    remapCoverageReporter: {
        'text-summary': null,
        json: './coverage/report/coverage-final.json',
        html: './coverage/html'
    },

    // web server port
    port: 9876,

    // enable / disable colors in the output (reporters and logs)
    colors: true,

    // level of logging
    // possible values: config.LOG_DISABLE || config.LOG_ERROR || config.LOG_WARN || config.LOG_INFO || config.LOG_DEBUG
    logLevel: config.LOG_INFO,

    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: false,

    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    customLaunchers: { ChromeHeadless: { base: 'Chrome', flags: ['--headless', '--disable-gpu', '--remote-debugging-port=9222'] } },
    browsers: isTestWatch ? ['Chrome'] : ['ChromeHeadless'],

    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: true
  };

  config.set(_config);
};