tests.html

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<html>
<head>
  <meta charset="utf-8">

  <title>matchesSelector tests</title>

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  <script src="bower_components/qunit/qunit/qunit.js"></script>

</head>
<body>

  <div id="alpha" class="item red"></div>
  <div id="beta" class="item blue"></div>
  <div id="gamma" class="item green"></div>

  <div id="qunit"></div>

<script src="matches-selector.js"></script>
<script src="tests.js"></script>

</body>
</html>