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<html>
<head>
<script type="text/javascript">
function is(aLeft, aRight, aMessage) {
window.opener.SimpleTest.is(aLeft, aRight, aMessage);
}
function unload() {
window.opener.SimpleTest.finish();
}
function boom() {
var root = document.documentElement;
while (root.firstChild) {
root.firstChild.remove();
}
root.appendChild(document.createTextNode("Mozilla"));
root.focus();
let cespan = document.createElementNS("http://www.w3.org/1999/xhtml", "span");
cespan.setAttributeNS(null, "contenteditable", "true");
root.appendChild(cespan);
try {
document.execCommand("selectAll", false, null);
} catch (e) { }
is(window.getSelection().toString(), "Mozilla",
"The nodes are not selected");
window.close();
}
window.opener.SimpleTest.waitForFocus(boom, window);
</script></head>
<body onunload="unload();"></body>
</html>