How to unit test express Router routes : <p>I'm new to Node and Express and I'm trying to unit test my routes/controllers. I've separated my routes from my controllers. How do I go about testing my routes?</p>

<p><strong>config/express.js</strong></p>

<pre><code>  var app = express();
  // middleware, etc
  var router = require('../app/router')(app);
</code></pre>

<p><strong>app/router/index.js</strong></p>

<pre><code>  module.exports = function(app) {
    app.use('/api/books', require('./routes/books'));
  };
</code></pre>

<p><strong>app/router/routes/books.js</strong></p>

<pre><code>  var controller = require('../../api/controllers/books');
  var express = require('express');
  var router = express.Router();

  router.get('/', controller.index);

  module.exports = router;
</code></pre>

<p><strong>app/api/controllers/books.js</strong></p>

<pre><code>// this is just an example controller
exports.index = function(req, res) {
    return res.status(200).json('ok');
};
</code></pre>

<p><strong>app/tests/api/routes/books.test.js</strong></p>

<pre><code>  var chai = require('chai');
  var should = chai.should();
  var sinon = require('sinon');

  describe('BookRoute', function() {

  });
</code></pre>
