node/test/parallel/test-net-connect-immediate-finish.js

var common = require('../common');
var assert = require('assert');
var net = require('net');

var gotError = false;

var client = net.connect({
  host: 'no.way.you.will.resolve.this',
  port: common.PORT
});

client.once('error', function(err) {
  gotError = true;
});

client.end();

process.on('exit', function() {
  assert(gotError);
});