config.js

'use strict';
if (!process.env.CHROME_BIN) {
  process.env.CHROME_BIN = require('puppeteer').executablePath();
}

const NodePolyfillPlugin = require('node-polyfill-webpack-plugin');

module.exports = {
  // base path, that will be used to resolve files and exclude
  basePath: '../src',

  // load tap integration
  frameworks: [
    'tap', 'webpack'
  ],

  // Run on Chrome Headless
  customLaunchers: {
    ChromeHeadlessNoSandbox: {
      base: 'ChromeHeadless',
      // Flags required to run in ubuntu-22.04 or above (https://chromium.googlesource.com/chromium/src/+/master/docs/linux/suid_sandbox_development.md)
      flags: ['--no-sandbox', '--disable-setuid-sandbox']
    }
  },
  browsers: ['ChromeHeadlessNoSandbox'],

  // list of files / patterns to load in the browser
  files: [
    // Uncomment to run a particular UT:
    // '**/listeners/__tests__/browser.spec.js',
    // Run browser UTs. Commons and Node UTs run with `test-node` npm script
    '*/**/__tests__/**/browser.spec.js'
  ],

  // list of files / patterns to exclude
  exclude: [
    '*/**/__tests__/**/node.spec.js',
    '*/**/__tests__/**/node_redis.spec.js',
    '*/**/__tests__/**/*.node.spec.js',
    '*/**/__tests__/**/inputValidation/*.spec.js'
  ],

  // prepare code for the browser using webpack
  preprocessors: {
    '*/**/__tests__/**/*.spec.js': ['webpack'],
  },

  webpack: {
    mode: 'production', // Use 'development' to debug with not minified bundle
    devtool: false, // Use 'inline-source-map' to debug with source map

    target: ['web', 'es5'], // 'web' => resolve.mainFields === ['browser', 'module', 'main']
    module: {
      rules: [
        {
          test: /\.(ts|js)$/,

          // Cannot exclude 'node_modules/@splitsoftware/splitio-commons/src', in order to process TS files
          exclude: /node_modules[/](?!@splitsoftware)/,

          use: {
            loader: 'ts-loader',
            options: {
              transpileOnly: true, // https://webpack.js.org/guides/build-performance/#typescript-loader
              allowTsInNodeModules: true, // https://github.com/TypeStrong/ts-loader#allowtsinnodemodules
            }
          }
        }
      ]
    },
    plugins: [
      new NodePolyfillPlugin({
        additionalAliases: ['process']
      })
    ],
    resolve: {
      extensions: ['.ts', '.js'],
      fallback: {
        fs: false
      }
    }
  },

  webpackServer: {
    noInfo: true
  },

  // web server port
  port: 9876,

  // make IE happy (in theory not required)
  // https://msdn.microsoft.com/en-us/library/ff955275(v=vs.85).aspx
  customHeaders: [{
    match: 'html',
    name: 'X-UA-Compatible',
    value: 'IE=edge'
  }, {
    match: 'csv$',
    name: 'Content-Type',
    value: 'text/plain'
  }],

  // Which plugins to enable
  plugins: [
    'karma-webpack',
    'karma-tap',
    'karma-chrome-launcher'
  ],

  browserConsoleLogOptions: {
    terminal: false
  },

  // Continuous Integration mode
  // if true, it capture browsers, run tests and exit
  singleRun: true,

  colors: true,

  /**
   * @WARNING in local mode, murmur verification takes forever (chrome tested),
   *          so I keep this only to be used by Chrome Headless.
   */
  browserDisconnectTolerance: 1,
  browserNoActivityTimeout: 60 * 60 * 1000,
  reportSlowerThan: 30,
};