text: 
  var request = require('supertest');
  
  var app = require('./index.js');
  
  describe('Hello World', function () {
    it('should return hello world', function (done) {
      request(app.listen())
      .get('/')
      .expect(200)
      .expect('Content-Length', 11)
      .expect('Content-Type', 'text/plain; charset=utf-8')
      .end(done)
    })
  })
  