test/index.html

<!DOCTYPE html>
<html>
  <head>
    <title>ol-layerswitcher spec runner</title>
    <meta charset="utf-8" />
    <link
      rel="stylesheet"
      type="text/css"
      href="../node_modules/mocha/mocha.css"
    />
    <link rel="stylesheet" href="https://openlayers.org/en/v6.1.1/css/ol.css" />
    <link rel="stylesheet" type="text/css" href="../dist/ol-layerswitcher.css" />
    <style type="text/css">
      /* Can be useful when writing tests, uncomment the following CSS to always show
           the panel and add a `debugger` statement where you want to inspect the current state */
        /*
        .layer-switcher .panel {
            display: block;
        }
        #map1, #map2 {
          height: 600px;
        }
        */
    </style>
  </head>
  <body>
    <div id="mocha"></div>
    <script src="https://cdn.polyfill.io/v2/polyfill.min.js?features=requestAnimationFrame,Array.prototype.includes,Element.prototype.classList,Object.assign,Event,URL"></script>
    <script
      type="text/javascript"
      src="../node_modules/jquery/dist/jquery.js"
    ></script>
    <script
      type="text/javascript"
      src="../node_modules/expect.js/index.js"
    ></script>
    <script
      type="text/javascript"
      src="../node_modules/mocha/mocha.js"
    ></script>
    <script
      type="text/javascript"
      src="https://cdn.jsdelivr.net/npm/lodash@4.17.11/lodash.min.js"
    ></script>
    <script src="https://cdn.jsdelivr.net/npm/difflib@0.2.4/dist/difflib-browser.min.js"></script>
    <script>
      mocha.setup({
        ui: 'bdd',
        bail: false
      });
    </script>
    <script src="https://openlayers.org/en/v6.1.1/build/ol.js"></script>
    <script type="text/javascript" src="../dist/ol-layerswitcher.js"></script>
    <script type="text/javascript" src="utils.js"></script>
    <script type="text/javascript" src="spec/ol-layerswitcher.js"></script>
    <script type="text/javascript" src="spec/twomaps.js"></script>
    <script type="text/javascript" src="spec/renderpanel.js"></script>
    <script type="text/javascript" src="spec/groupselectstyle.js"></script>
    <script type="text/javascript" src="spec/startactive.js"></script>
    <script type="text/javascript" src="spec/activationmode.js"></script>
    <script>
      mocha.run();
    </script>
  </body>
</html>