This tests indenting "three" then executes the undo command after changing the editability to false. You should see one, two numbered 1 through 2 then three and four as a sublist starting with number 1. The undo should have no effect.
Bugzilla bug 
Radar bug

one
two
three
four
Before indent: <li>one</li> <li>two</li> <li id="test">three</li> <ol><li>four</li></ol>
After indent: <li>one</li> <li>two</li> <ol><li id="test">three</li><li>four</li></ol>
After undoing: <li>one</li> <li>two</li> <ol><li id="test">three</li><li>four</li></ol>
The test passed