title: What is role of the suite function in Mocha?
body: <p>I read the book Web Development with Node.js and Express. And there is used the function <code>suite()</code>.</p>
  
  <pre><code>var assert = require('chai').assert;
  suite('tests', function () {
    // set of tests
  });
  </code></pre>
  
  <p>I don't understand where it comes from. I can't find any documentation about this function.
  Seems that it looks and has same functionality like the <code>describe()</code> function in Mocha.</p>