<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <title>Mocha Tests</title>
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <link rel="stylesheet" href="https://unpkg.com/mocha/mocha.css" />
    <script src="https://unpkg.com/mocha/mocha.js"></script>
    <script class="mocha-init">
      mocha.setup('bdd');
    </script>
    <script src="https://unpkg.com/chai/chai.js"></script>
    <script>
    // make assert global
    let assert = chai.assert;
 