async-n-net-server.js

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

var expected = 0, caught = 0;
process.on('exit', function () {
  assert(expected === caught);
  console.log('ok expected', expected, 'caught', caught);
});

var d = domain.create();
d.on('error', function () { caught++; });

var server;
d.run(function() {
  server = net.createServer(function () {
    throw new Error("too lazy to actually implement");
  });
});
expected++;
server.listen(8000);

var client = net.connect(
  {port : 8000},
  function () {
    client.write('hi\r\n');
    client.end();
  }
);
client.on('end', function() { server.close(); });