LayoutTests/editing/inserting/4959067.html

<p>This tests to make sure that insertion over a fully selected special element doesn't do expansion.</p>
<div contenteditable="true">
<ul id="ul"><li><a id="anchor" href="http://www.google.com/">foo</a></li></ul>
</div>
<ul id="console"></ul>
<script>
function log(str) {
    var li = document.createElement("li");
    var text = document.createTextNode(str);
    var console = document.getElementById("console");
    li.appendChild(text);
    console.appendChild(li);
}

var sel = window.getSelection();
var anchor = document.getElementById("anchor");
sel.setBaseAndExtent(anchor, 0, anchor, anchor.childNodes.length);
document.execCommand("InsertText", false, "foo");
anchor = document.getElementById("anchor");
if (!anchor)
    log("Failure: a special element was removed during insertion.");
</script>