<script src="../../resources/js-test-pre.js"></script>
<body>
<script>
    var style = document.createElement("style");
    style.innerText = '#test:before { content: "before"; } #test:after { content: "after"; }';
    var span = document.createElement("span");
    span.id = "test";
    var div = document.createElement("div");
    div.appendChild(style);
    div.appendChild(span);
    document.body.appendChild(div);
</script>
<script src="../../resources/js-test-post.js"></script>