karma.common.conf.js

module.exports = async function(config) {
  const { installBrowsersForNpmInstall, registry } = require('playwright-core/lib/server');
  await installBrowsersForNpmInstall(["firefox", "chromium"]);
  process.env.FIREFOX_BIN = registry.findExecutable("firefox").executablePath();
  process.env.CHROMIUM_BIN = registry.findExecutable("chromium").executablePath();

  config.set({
    basePath: 'dist',
    frameworks: ['mocha'],
    client: {
      mocha: {
        ui: 'tdd',
        timeout: 2000 * (process.env.CI === undefined ? 1 : 10)
      },
    },
    files: [
      {pattern: './*.js', included: true, watched: true, served: true, type: 'module'},
      {pattern: './**/*', included: false, watched: true, served: true},
    ],
    autoWatch: true,
    browsers: [
      'ChromiumHeadlessNoSandbox',
      'FirefoxHeadless',
    ],
    customLaunchers: {
      ChromiumHeadlessNoSandbox: {
        base: 'ChromiumHeadless',
        flags: ['--no-sandbox']
      }
    },
    singleRun: false,
    logLevel: config.LOG_ERROR
  });
}