public/index.html
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>Mocha Tests</title>
<link href="https://cdn.rawgit.com/mochajs/mocha/2.2.5/mocha.css" rel="stylesheet">
</head>
<body>
<div id="mocha"></div>
<script src="http://chaijs.com/chai.js"></script>
<script src="https://cdn.rawgit.com/mochajs/mocha/2.2.5/mocha.js"></script>
<script>
var expect = chai.expect;
mocha.setup('bdd');
</script>
<script src="./bundle.js"></script>
<script src="./test.js"></script>
<script>
mocha.run();
</script>
</body>
</html>