karma.conf.js

const path = require('path');
const webpackConfig = require('./webpack.config')[0];

const USING_TRAVISCI = Boolean(process.env.TRAVIS);
const USING_SL = Boolean(process.env.SAUCE_USERNAME && process.env.SAUCE_ACCESS_KEY);

const SL_LAUNCHERS = {
  'sl-chrome-stable': {
    base: 'SauceLabs',
    browserName: 'chrome',
    version: 'latest',
    platform: 'macOS 10.12',
  },
  'sl-chrome-beta': {
    base: 'SauceLabs',
    browserName: 'chrome',
    version: 'beta',
    platform: 'macOS 10.12',
  },
  'sl-chrome-previous': {
    base: 'SauceLabs',
    browserName: 'chrome',
    version: 'latest-1',
    platform: 'macOS 10.12',
  },
  'sl-firefox-stable': {
    base: 'SauceLabs',
    browserName: 'firefox',
    version: 'latest',
    platform: 'Windows 10',
  },
  'sl-firefox-previous': {
    base: 'SauceLabs',
    browserName: 'firefox',
    version: 'latest-1',
    platform: 'Windows 10',
  },
  'sl-ie': {
    base: 'SauceLabs',
    browserName: 'internet explorer',
    version: '11',
    platform: 'Windows 8.1',
  },
  // TODO: Re-enable Edge and Safari after Sauce Labs problems are fixed.
  // 'sl-edge': {
  //   base: 'SauceLabs',
  //   browserName: 'microsoftedge',
  //   version: 'latest',
  //   platform: 'Windows 10',
  // },
  // 'sl-safari-stable': {
  //   base: 'SauceLabs',
  //   browserName: 'safari',
  //   version: 'latest',
  //   platform: 'macOS 10.12',
  // },
  // 'sl-safari-previous': {
  //   base: 'SauceLabs',
  //   browserName: 'safari',
  //   version: '9.0',
  //   platform: 'OS X 10.11',
  // },
  'sl-ios-safari-latest': {
    base: 'SauceLabs',
    deviceName: 'iPhone Simulator',
    platformVersion: '10.0',
    platformName: 'iOS',
    browserName: 'Safari',
  },
  // 'sl-ios-safari-previous': {
  //   base: 'SauceLabs',
  //   deviceName: 'iPhone Simulator',
  //   platformVersion: '9.3',
  //   platformName: 'iOS',
  //   browserName: 'Safari',
  // },
};

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: ['mocha'],
    files: [
      'test/unit/index.js',
    ],
    preprocessors: {
      'test/unit/index.js': ['webpack', 'sourcemap'],
    },
    reporters: ['dots', 'coverage'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    browsers: determineBrowsers(),
    browserDisconnectTimeout: 40000,
    browserNoActivityTimeout: 120000,
    captureTimeout: 240000,
    concurrency: USING_SL ? 4 : Infinity,
    customLaunchers: SL_LAUNCHERS,

    coverageReporter: {
      dir: 'coverage',
      reporters: [
        {type: 'lcovonly', subdir: '.'},
        {type: 'json', subdir: '.', file: 'coverage.json'},
        {type: 'html'},
      ],
    },

    client: {
      mocha: {
        reporter: 'html',
        ui: 'qunit',
      },
    },

    webpack: Object.assign({}, webpackConfig, {
      devtool: 'inline-source-map',
      module: Object.assign({}, webpackConfig.module, {
        // Cover source files when not debugging tests. Otherwise, omit coverage instrumenting to get
        // uncluttered source maps.
        rules: webpackConfig.module.rules.concat([config.singleRun ? {
          test: /\.js$/,
          include: path.resolve('./packages'),
          exclude: [
            /node_modules/,
            /adapter.js/,
          ],
          loader: 'istanbul-instrumenter-loader',
          query: {esModules: true},
        } : undefined]).filter(Boolean),
      }),
    }),

    webpackMiddleware: {
      noInfo: true,
    },
  });

  // See https://github.com/karma-runner/karma-sauce-launcher/issues/73
  if (USING_TRAVISCI) {
    config.set({
      sauceLabs: {
        testName: 'AD Framework Unit Tests - CI',
        tunnelIdentifier: process.env.TRAVIS_JOB_NUMBER,
        username: process.env.SAUCE_USERNAME,
        accessKey: process.env.SAUCE_ACCESS_KEY,
        startConnect: false,
      },
      // Attempt to de-flake Sauce Labs tests on TravisCI.
      transports: ['polling'],
      browserDisconnectTolerance: 3,
    });
  }
};

function determineBrowsers() {
  return USING_SL ? Object.keys(SL_LAUNCHERS) : ['Chrome'];
}