<html>
<head>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
</head>
<body>
<script>

let test = async_test('An element removed by the adoption agency algorithm must not be inserted if it had been inserted elsewhere');

var p;
test.step(() => {
    const iframe = document.createElement('iframe');
    document.body.appendChild(iframe);

    let doc = iframe.contentDocument;
    doc.write(`<body><a id="target" href="#"></a>`);

    const target = doc.querySelector('a');
    target.onfocus = () => {
        target.onfocus = null;

        test.step(() => {
            let container = doc.querySelector('div');
            container.remove();
            doc.body.appendChild(p);
        });

        setTimeout(() => {
            test.step(() => {
                assert_equals(p.parentNode, doc.body);
            });
            test.done();
            iframe.remove();
        }, 0);
    }

    doc.write(`<div><b><p><script>
        parent.p = document.querySelector('p');
        document.write('<link rel="stylesheet" href="data:,a">');
        location.hash = 'target';
    <\/script></b></p></div></body>`);
});

</script>
</body>
</html>