Integration testing a node.js web app with Mocha

server.js

var http = require('http');
var server = undefined;

function HttpServer(config) {
    this.port = config.port;
}

HttpServer.prototype.start = function (fn) {
    server = http.createServer(function (req, res) {
      res.writeHead(200, {'Content-Type': 'application/json'});
        res.end(JSON.stringify({ data: 'Some data'}));
    }).listen(this.port, fn);
     console.log('Server started at [%s]', this.port);
    return this;
};

HttpServer.prototype.stop = function (fn) {
    server.close();
    if (fn) {
        fn();
    }
};

exports.HttpServer = HttpServer;

ServerITSpec.js

var should = require('should');
var request = require('request');
var url = 'http://localhost:8080';
var HttpServer = require('./server').HttpServer;
var server;

describe('HttpServer', function () {

    before(function (done) {
        server = new HttpServer({port: 8080}).start(done);
    });

    after(function (done) {
        server.stop(done);
    });

    it('should get root ok', function (done) {
        request(url, function (error, response, body) {
            response.statusCode.should.eql(200);
            body.should.eql({ data: 'Some data'});
            done();
        });
    });
});