mdns-series.js

var net = require('net');
var mdns = require('mdns');

var serviceKey = mdns.tcp('custom-name');

var discover = mdns.createBrowser(serviceKey);
    discover.on('serviceUp', function (service) {
      console.log({
        port: service.port,
        addresses: service.addresses
      });
    });
    discover.start();

function service(callback) {
  var announce = null;

  // Start service server
  var server = net.createServer().listen(0, '0.0.0.0', function () {
    var port = server.address().port;

    // Start announceing and discovering
    announce = mdns.createAdvertisement(serviceKey, port);
    announce.start();

    // When self announcement is done, the test can continue
    discover.on('serviceUp', function offline(service) {
      if (service.port == port) {
        discover.removeListener('serviceUp', offline);
        return callback();
      }
    });
  });
}

console.log('done 1/3');
service(function () {
  console.log('done 2/3');
  service(function () {
    console.log('done 3/3');
    console.log('?==================?');
    console.log('? something worked ?');
    console.log('?==================?');
  });
});