mocha_server.js

fs = require('fs');
require('coffee-script');
process.env.NODE_ENV = 'test';

/**
 * Module dependencies.
 */

var express = require('express'),
  stylus = require('stylus'),
  nib = require('nib'),
  http = require('http');

var app = express();

app.configure(function(){
  app.set('port', process.env.PORT || 8888);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'jade');
  app.use(express.favicon());
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(app.router);

  app.use(require('connect-assets')({
    src: '../../assets'
  }));

  app.use(express['static'](__dirname + '/tests'));
});

css.root = 'stylesheets';
js.root = 'javascripts';

app.get('/', function(req, res) {
  res.render(__dirname + '/runner', {
    mocha_js: fs.readFileSync('../node_modules/mocha/mocha.js'),
    mocha_css: fs.readFileSync('../node_modules/mocha/mocha.css') 
  });
});

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});

runner.jade

html
  head
    meta(charset="utf-8")
    title | Mocha Tests
    != js('vendor')
    style!= mocha_css
    script!= mocha_js
    script mocha.setup('bdd');
    script
      $(function() {
        mocha.run();
      });
  body
    #mocha
    #mocha-content