wait-for-port/test/helpers.js

wait for host/port to become available

var net = require('net');

exports.nextRandomPort = function(cb) {
  var server = net.createServer(function() {
  });
  server.listen(0, function() {
    var port = server.address().port;
    server.close(function(err) {
      // console.log('next random port: ' + port);
      cb(err, port);
    });
  });
}