adopt-iframe-into-itself.html | Explore in Territory

<script>
if (window.testRunner)
    testRunner.dumpAsText();

function test() {
    try {
        var frame = document.getElementById("f");
        var childNode = frame.contentDocument.adoptNode(frame);
    } catch(ex) {
        alert(ex);
    }
}
</script>
<iframe id="f" onload="test();" srcdoc="<body></body>"></iframe>

chromium/third_party/blink/web_tests/fast/frames/adopt-iframe-into-itself.html