LayoutTests/editing/style/highlight-insert-paragraph.html - WebKit - Git at Google

 <html>
 <body>
 <p>This tests inserting a new paragraph preserves the background color.</p>
 <div>
 <div id="test" contenteditable="true">
 test
 </div>
 </div>
 <div id="console"></div>

 <script type="text/javascript">

 function pressKey( key ) {
     if (window.KeyEvent) {
         var ev = document.createEvent("KeyboardEvent");
         ev.initKeyEvent("keypress", true, true, window,  0,0,0,0, 0, key.charCodeAt(0));
         document.body.dispatchEvent(ev);
     }
     else {
         var ev = document.createEvent("TextEvent");
         ev.initTextEvent('textInput', true, true, null, key.charAt(0));
         document.body.dispatchEvent(ev);
     }
 }

 if (window.testRunner)
     testRunner.dumpAsText();

 var e = document.getElementById('test');
 var s = window.getSelection();

 r = document.createRange();
 r.setStart(e.firstChild,0);
 r.setEnd(e.firstChild,5);
 s.removeAllRanges();
 s.addRange(r);
 document.execCommand("hiliteColor",false,"#99f");

 r = document.createRange();
 r.setStart(e.firstChild.firstChild,5);
 r.setEnd(e.firstChild.firstChild,5);
 s.removeAllRanges();
 s.addRange(r);
 pressKey('\n');
 pressKey('e');

 document.getElementById('console').appendChild(document.createTextNode(e.innerHTML));

 </script>
	<html>
	<body>
	<p>This tests inserting a new paragraph preserves the background color.</p>
	<div>
	<div id="test" contenteditable="true">
	test
	</div>
	</div>
	<div id="console"></div>

	<script type="text/javascript">

	function pressKey( key ) {
	if (window.KeyEvent) {
	var ev = document.createEvent("KeyboardEvent");
	ev.initKeyEvent("keypress", true, true, window, 0,0,0,0, 0, key.charCodeAt(0));
	document.body.dispatchEvent(ev);
	}
	else {
	var ev = document.createEvent("TextEvent");
	ev.initTextEvent('textInput', true, true, null, key.charAt(0));
	document.body.dispatchEvent(ev);
	}
	}

	if (window.testRunner)
	testRunner.dumpAsText();

	var e = document.getElementById('test');
	var s = window.getSelection();

	r = document.createRange();
	r.setStart(e.firstChild,0);
	r.setEnd(e.firstChild,5);
	s.removeAllRanges();
	s.addRange(r);
	document.execCommand("hiliteColor",false,"#99f");

	r = document.createRange();
	r.setStart(e.firstChild.firstChild,5);
	r.setEnd(e.firstChild.firstChild,5);
	s.removeAllRanges();
	s.addRange(r);
	pressKey('\n');
	pressKey('e');

	document.getElementById('console').appendChild(document.createTextNode(e.innerHTML));

	</script>