LayoutTests/editing/execCommand/remove-formatting.html

<script>
if (window.layoutTestController)
     layoutTestController.dumpEditingCallbacks();
</script>
<p>This is a test for execCommand("RemoveFormat").  <b>It demonstrates a bug: everything in the editable region below should be selected, as everything was selected before Remove Format was performed.</b></p>
<div id="test" contenteditable="true">
<b>foo</b><a href="http://www.google.com/">bar</a><i>baz</i><br>
<table border="1"><tr><td>foo</td><td>bar</td><td>baz</td></tr></table>
<u>foo</u>bar<span style="text-decoration:line-through">baz</span><br>
</div>
<ul id="console"></ul>
<script>
function log(message) {
    var console = document.getElementById("console");
    var li = document.createElement("li");
    var text = document.createTextNode(message);
    
    console.appendChild(li);
    li.appendChild(text);
}
var e = document.getElementById("test");
var s = window.getSelection();

if (document.queryCommandEnabled("RemoveFormat"))
    log("Failure: RemoveFormat enabled with no selection.");
s.setPosition(e, 0);
if (document.queryCommandEnabled("RemoveFormat"))
    log("Failure: RemoveFormat enabled with a caret selection.");
document.execCommand("SelectAll");
if (!document.queryCommandEnabled("RemoveFormat"))
    log("Failure: RemoveFormat disabled with an editable selection.");
if (!document.execCommand("RemoveFormat"))
    log("Failure: execCommand('RemoveFormat') returned false.");
</script>