karma.conf.js

// Karma configuration


const WEBPACK_CONFIG = require('./webpack.config.js')();

module.exports = function (config) {
  var karmaConfig = {
    // base path that will be used to resolve all patterns (eg. files, exclude)
    basePath: '',

    // frameworks to use
    // available frameworks: https://npmjs.org/browse/keyword/karma-adapter
    frameworks: ['jasmine'],

    // list of files / patterns to load in the browser
    files: [
      'node_modules/jasmine-promises/dist/jasmine-promises.js',
      'client/**/tests/index.js',
    ],

    // preprocess matching files before serving them to the browser
    // available preprocessors: https://npmjs.org/browse/keyword/karma-preprocessor
    preprocessors: {
      'client/**/*.js': ['webpack', 'sourcemap'],
    },

    // The first config is for the control interface. It is only coincidence
    // that this config works for the action code/tests as well.
    webpack: Object.assign(WEBPACK_CONFIG, {
      entry: undefined,
      devtool: undefined,
    }),

    webpackMiddleware: {
      stats: 'errors-only', // Only show errors during webpack builds.
    },

    // test results reporter to use
    // possible values: 'dots', 'progress'
    // available reporters: https://npmjs.org/browse/keyword/karma-reporter
    reporters: ['spec'],

    // web server port
    port: 9876,

    // enable / disable colors in the output (reporters and logs)
    colors: true,

    // possible values: config.LOG_DISABLE, config.LOG_ERROR, config.LOG_WARN,
    // config.LOG_INFO, or config.LOG_DEBUG.
    logLevel: config.LOG_INFO,

    // enable / disable watching file and executing tests whenever any file changes
    autoWatch: true,

    // start these browsers
    // available browser launchers: https://npmjs.org/browse/keyword/karma-launcher
    browsers: ['FirefoxHeadless'],

    // Continuous Integration mode
    // if true, Karma captures browsers, runs the tests and exits
    singleRun: false,

    // Concurrency level
    // how many browser should be started simultaneous
    concurrency: Infinity,
  };

  if (process.env.JUNIT_REPORT_PATH) {
    karmaConfig.reporters.push('junit');
    karmaConfig.junitReporter = {
      outputDir: process.env.JUNIT_REPORT_PATH,
      outputFile: process.env.JUNIT_REPORT_NAME,
      useBrowserNAme: false,
    };
  }

  config.set(karmaConfig);
};