File: karma.conf.js

// Karma configuration
// Generated on Thu May 02 2019 12:19:56 GMT+0000 (Coordinated Universal Time)
module.exports = (config) => {
  config.set({
    // base path that will be used to resolve all patterns (eg. files, exclude)
    // basePath: './',
    // urlRoot: '/',

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

    plugins: [
      'karma-jasmine',
      'karma-webpack',
      'karma-chrome-launcher'
    ],

    webpack: {
      mode: 'development',
      module: {
        rules: [
          {
            test: /\.js$/,
            loader: 'babel-loader'
          }
        ]
      }
    },

    // list of files / patterns to load in the browser
    files: [
      './tests/unit/**/*.test.js'
    ],

    preprocessors: {
      './tests/unit/**/*.test.js': ['webpack']
    },

    // proxies: {
    //   '/base/src/': './src/'
    // },
    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: [
      'progress'
    ],

    // 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
    browsers: ['ChromeHeadlessCustom'],

    customLaunchers: {
      ChromeHeadlessCustom: {
        base: 'ChromeHeadless',
        flags: ['--no-sandbox']
      }
    },

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

    // Concurrency level
    // how many browser should be started simultaneous
    concurrency: 8
  });
};