karma.conf.js

// Karma configuration file
var karma = require('karma');

module.exports = function (karma) {
  var config = {
    singleRun: true,
    autoWatch: false,
    autoWatchInterval: 0,

    // level of logging
    // possible values: LOG_DISABLE, LOG_ERROR, LOG_WARN, LOG_INFO, LOG_DEBUG
    logLevel: 'warn',

    reporters: ['super-dots', 'mocha'],
    colors: true,
    mochaReporter: {
      output: 'minimal',
    },

    port: 8080,

    // base path, that will be used to resolve files and exclude
    basePath: '.',

    // Start these browsers, currently available:
    // Chrome, ChromeCanary, Firefox, Opera, Safari, PhantomJS
    browsers: ['ChromeHeadlessNoSandbox'],
    customLaunchers: {
      ChromeHeadlessNoSandbox: { base: 'ChromeHeadless', flags: ['--no-sandbox'] },
    },

    frameworks: ['jasmine'],

    plugins: [
      require('karma-webpack'),
      require('karma-sourcemap-loader'),
      require('karma-super-dots-reporter'),
      require('karma-mocha-reporter'),
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
    ],

    webpack: {
      mode: 'development',
      devtool: 'inline-source-map',

      resolve: {
        extensions: ['.js', '.ts'],
      },

      module: {
        rules: [
          {
            test: /\.ts$/,
            loader: 'ts-loader',
            options: {
              configFile: 'test/tsconfig.json',
              transpileOnly: true,
            },
          },
        ],
      },
    },

    webpackMiddleware: {
      stats: 'minimal',
    },

    files: ['test/index.js'],

    preprocessors: {
      'test/index.js': ['webpack', 'sourcemap'],
    },
  };

  karma.set(config);
};