<script src="../include.js"></script>
<div id="one"></div><div id="two"></div><script>
    test(() => {
        let one = document.getElementById("one");
        let two = document.getElementById("two");
        two.before(one);
        printElement(one);
        printElement(one.nextSibling);
        printElement(two);
        printElement(two.previousSibling);
        println("PASS (didn't crash)");
    });
</script>