karma.conf.js

const path = require('path');
const project = require('./aurelia_project/aurelia.json');
const tsconfig = require('./tsconfig.json');
const karmaConfig = project.unitTestRunner;

let testSrc = [
  { pattern: karmaConfig.source, included: false },
  'test/aurelia-karma.js'
];

let output = project.platform.output;
let appSrc = project.build.bundles.map(x => path.join(output, x.name));
let pluginSrc = appSrc.find(b=>b.indexOf('plugin')>0);
let entryIndex = appSrc.indexOf(path.join(output, project.build.loader.configTarget));
let entryBundle = appSrc.splice(entryIndex, 1)[0];
let sourceMaps = [{pattern:'scripts/**/*.js.map', included: false}];
let files = [entryBundle].concat(testSrc).concat(appSrc).concat(sourceMaps);

let compilerOptions = tsconfig.compilerOptions;
compilerOptions.inlineSourceMap = true;
compilerOptions.inlineSources = true;
compilerOptions.module = 'amd';

module.exports = function(config) {
  config.set({
    basePath: '',
    frameworks: [project.testFramework.id],
    files: files,
    exclude: [],
    preprocessors: {
      [karmaConfig.source]: [project.transpiler.id],
      [appSrc]: ['sourcemap'],
      [pluginSrc]:['sourcemap','coverage']
    },
    typescriptPreprocessor: {
      typescript: require('typescript'),
      options: compilerOptions
    },
    reporters: ['progress','coverage'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    /*
     * start these browsers
     * available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
     */
    // browsers: [
    //   'Chrome',
    // ],
    /*
     * To run in non-headless mode:
     * 1. Comment the following lines
     * 2. Uncomment the above "browsers" setting
    */
    // browsers: ['Safari'],
    browsers: [
      'ChromeHeadless',
    ],
    customLaunchers: {
      'ChromeHeadless': {
        base: 'Chrome',
        flags: [
          '--no-sandbox',
          '--headless',
          '--disable-gpu',
          '--remote-debugging-port=9222'
        ]
      }
    },


    coverageReporter: {
      // specify a common output directory
      dir: 'test/coverage-karma',
      reporters: [
        // {type : 'none'},
        // reporters not supporting the `file` property
        { type: 'html', subdir: 'report-html' },
        { type: 'lcovonly', subdir: '.', file: 'lcov.info' }
        // { type: 'text', subdir: '.', file: 'text.txt' },
        // { type: 'text-summary', subdir: '.', file: 'text-summary.txt' },
      ]
    },
    /** **************************************************************************** */

    /*
     * Continuous Integration mode
     * if true, Karma captures browsers, runs the tests and exits
     */
    singleRun: true,
    // client.args must be a array of string.
    // Leave 'aurelia-root', project.paths.root in this order so we can find
    // the root of the aurelia project.
    client: {
      args: ['aurelia-root', project.paths.root]
    }
  });
};