config.js

'use strict';
// Comment the next two lines if you want to run with Chrome instead of Chromium
const puppeteer = require('puppeteer');
process.env.CHROME_BIN = puppeteer.executablePath();

const nodeResolve = require('@rollup/plugin-node-resolve').nodeResolve;
const commonjs = require('@rollup/plugin-commonjs');
const json = require('@rollup/plugin-json');
const string = require('rollup-plugin-string').string;
const babel = require('@rollup/plugin-babel').default;
const terser = require('rollup-plugin-terser').terser;
const nodePolyfills = require('rollup-plugin-node-polyfills');

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

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

  // Run on Chrome Headless
  browsers: [
    'ChromeHeadless'
  ],

  // list of files / patterns to load in the browser
  files: [
    { pattern: '*/__tests__/**/*.spec.js', watched: false },
    {
      pattern: 'engine/__tests__/engine/mocks/murmur3*.csv',
      watched: false,
      included: false,
      served: true,
      nocache: true
    },
    {
      pattern: 'engine/__tests__/matchers/mocks/regex.txt',
      watched: false,
      included: false,
      served: true,
      nocache: true
    }
  ],

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

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

  rollupPreprocessor: {
    // `input` is handled by karma-rollup-preprocessor.
    output: {
      format: 'umd',
      name: 'splitio',
      // sourcemap: 'inline', // uncomment for debugging
    },
    plugins: [
      nodeResolve({
        browser: true,
        preferBuiltins: false,
      }),
      commonjs(),
      json(),
      string({ include: '**/*.txt' }),
      babel({
        babelHelpers: 'runtime',
        exclude: 'node_modules/**',
      }),
      terser(),
      nodePolyfills()
    ]
  },

  // @TODO check next configs and migrate if needed:

  // webpack: {
  //   ...
  //   plugins: [
  //     new webpack.DefinePlugin({
  //       'process.env.NODE_ENV': JSON.stringify('test'),
  //       __DEV__: true
  //     })
  //   ],
  //   node: {
  //     fs: 'empty'
  //   }
  // },
  // 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-*'
  ],

  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,
};