This is an example of an express node.js server which can be launched using naught, with an integration test using supertest. Each worker naught runs will test itself on a unique port, and only if passes it will listen in on the main port and join the pool.

supertestForNaught.js

var express = require('express');
var supertest = require('supertest');
var mainport = 80;

var app = express();

app.get('/test', function(req, res) { res.send({ 'pid' : process.pid }); } );

function listenToMainport() {
	app.listen(mainport, function(){
	  console.log("Listening to port %d ...", mainport);
	  if (process.send) process.send('online');	  
	});
}

function integrationTest() {
	console.log('Testing pid %d ...', process.pid);
	
	var testport = 10000 + process.pid;
	var server = app.listen(testport, function() {
		console.log('pid %d listening on port %d ...', process.pid, testport);

		supertest(server)
		.get('/test')
		.expect(200)
		.end(function(err, res){

			if (err) {
				console.log(err); 
				if (process.send) process.send('offline');
				process.exit(-1);
			}
			else {
				console.log('pid %d tested OK, closing test server and launching main one...', process.pid);
				server.close();
				listenToMainport();				
			}
			
		});
	});
}

process.on('message', function(message) {
  if (message === 'shutdown') {    
    process.exit(0);
  }
});

integrationTest();