karma.conf.js

var path = require('path');

var absoluteBasePath = path.resolve(__dirname);

/* global process */

// configures browsers to run test against
// any of [ 'ChromeHeadless', 'Chrome', 'Firefox', 'IE', 'PhantomJS' ]
var browsers =
  (process.env.TEST_BROWSERS || 'PhantomJS')
    .replace(/^\s+|\s+$/, '')
    .split(/\s*,\s*/g)
    .map(function(browser) {
      if (browser === 'ChromeHeadless') {
        process.env.CHROME_BIN = require('puppeteer').executablePath();

        // workaround https://github.com/GoogleChrome/puppeteer/issues/290
        if (process.platform === 'linux') {
          return 'ChromeHeadless_Linux';
        }
      }

      return browser;
    });


module.exports = function(karma) {
  karma.set({

    frameworks: [
      'mocha',
      'sinon-chai'
    ],

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

    preprocessors: {
      'test/suite.js': [ 'webpack' ]
    },

    reporters: [ 'spec' ],

    browsers: browsers,

    customLaunchers: {
      ChromeHeadless_Linux: {
        base: 'ChromeHeadless',
        flags: [
          '--no-sandbox',
          '--disable-setuid-sandbox'
        ],
        debug: true
      }
    },

    client: {
      mocha: {
        timeout: 10000
      }
    },

    browserNoActivityTimeout: 30000,

    singleRun: true,
    autoWatch: false,

    webpack: {
      mode: 'development',
      module: {
        rules: [
          {
            test: /\.css|\.bpmn$/,
            use: 'raw-loader'
          }
        ]
      },
      resolve: {
        modules: [
          'node_modules',
          absoluteBasePath
        ]
      }
    }
  });
};