LayoutTests/editing/pasteboard/4641033.html

<script>
if (window.testRunner)
     testRunner.dumpEditingCallbacks();
</script>
<p>This tests for a bug when creating markup for a selection that contained unrendered nodes with children.  You should see a picture of abe followed by a select box.</p>
<div id="paste" contenteditable="true"></div>

<img id="start" src="../resources/abe.png">
<select id="end"><optgroup><option>1</option><option>2</option><option>3</option></optgroup></select>
</select>
<script>
function runTest() {
    var start = document.getElementById("start");
    var end = document.getElementById("end");

    var s = window.getSelection();
    s.setBaseAndExtent(start, 0, end, end.childNodes.length);

    document.execCommand("Copy");

    s.setPosition(document.getElementById("paste"), 0);
    document.execCommand("Paste");

    const pastedImageElement = document.querySelector('#paste img');
    if (pastedImageElement.complete)
        finish();
    else
        pastedImageElement.onload = finish;
}
function finish() {
    if (window.testRunner)
        window.testRunner.notifyDone();
}
if (window.testRunner)
    window.testRunner.waitUntilDone();
window.onload = runTest;

</script>