integration tests for express with mocha.

app.js

var express = require('express');
// ...
var app = module.exports = express();
// ...

index.test.js

var request = require('supertest'),
    app = require('../app');

describe('/', function() {
  var requestPath = '/';

  describe('GET', function() {
    it('GETで200が返却されること', function(done) {
      request(app)
        .get(requestPath)
        .expect(200, done);
    });
  });

});

package.json

{
   :
   "devDependencies": {
     :
     "mocha": "*",
     "supertest": "0.6.0"
   }
 }