LayoutTests/editing/selection/getRangeAt.html

<!DOCTYPE html>
<html>
<head>
<script src="../../resources/dump-as-markup.js"></script>
<script>
if (window.testRunner)
     testRunner.dumpEditingCallbacks();

Markup.description('This tests that Selection::getRangeAt(int) returns a valid Range object.');
Markup.noAutoDump();

function runTest() {
    var elem = document.getElementById("test");
    var sel = window.getSelection();
    
    if (window.testRunner)
        window.testRunner.dumpAsText();

    sel.setBaseAndExtent(elem, 0, elem, 1);
    Markup.addRange(sel.getRangeAt(0));
    Markup.dump(document.body);
    Markup.notifyDone();
}
</script>
</head>
<body onload="runTest();">
<div id="test" style="border:1px solid black; padding:1em;">hello</div>
</body>
</html>