LayoutTests/editing/style/apply-font-size-to-multiple-nodes.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <script src="../../resources/dump-as-markup.js"></script>
 </head>
 <body>
 <div id="test" contenteditable>
 A man with 2
 <span style="font-family: Courier New, Courier">font faces</span><br>
 Death comes in all
 <span style="font-size: large">font sizes</span>
 </div>
 <script>

 var test = document.getElementById('test');
 document.getSelection().selectAllChildren(test);
 document.execCommand('fontSize', false, 7);
 Markup.description('Test that WebKit does not add multiple span or font elements when applying font-size to multiple nodes.')
 Markup.dump(test, 'You should see exactly one font element with size="7" and exactly one span');

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<script src="../../resources/dump-as-markup.js"></script>
	</head>
	<body>
	<div id="test" contenteditable>
	A man with 2
	<span style="font-family: Courier New, Courier">font faces</span><br>
	Death comes in all
	<span style="font-size: large">font sizes</span>
	</div>
	<script>

	var test = document.getElementById('test');
	document.getSelection().selectAllChildren(test);
	document.execCommand('fontSize', false, 7);
	Markup.description('Test that WebKit does not add multiple span or font elements when applying font-size to multiple nodes.')
	Markup.dump(test, 'You should see exactly one font element with size="7" and exactly one span');

	</script>
	</body>
	</html>