<!DOCTYPE html>
<html>
<head>
<script src="../../resources/js-test-pre.js"></script>
</head>
<body>
  <div id="newParent"></div>
  <iframe href="#" id="target"></iframe>
<script>
description("Test that adoptNode fails safely if prevented by a DOM mutation.");

function run() {
    newParent = document.getElementById("newParent");
    target = document.getElementById("target");
    target.contentWindow.addEventListener("unload", function () { newParent.appendChild(target); }, false);
    target.focus();
    var anotherDocument = document.implementation.createDocument("", "", null);

    try { anotherDocument.adoptNode(target); } catch(e) {}
    shouldBe("target.ownerDocument.location", "document.location");
}

document.addEventListener("DOMContentLoaded", run, false);
</script>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>