LayoutTests/editing/execCommand/insert-list-and-stitch.html

<script>
if (window.testRunner)
     testRunner.dumpEditingCallbacks();
</script>
<p>The three items below should be stitched together into one ordered list when you click the button.</div>
<div contenteditable="true">
<div id="item1">foo</div>
<div id="item2">bar</div>
<div id="item3">baz</div>
</div>
<script>
var s = window.getSelection();
s.setPosition(document.getElementById("item1"), 0);
document.execCommand("InsertOrderedList", false, "");
s.setPosition(document.getElementById("item2"), 0);
document.execCommand("InsertOrderedList", false, "");
s.setPosition(document.getElementById("item3"), 0);
document.execCommand("InsertOrderedList", false, "");
</script>