LayoutTests/fast/forms/delete-text-with-invisible-br.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <style type="text/css">
 br {visibility:hidden}
 </style>
 </head>
 <body>
 <p>This test ensures WebKit does not lose focus when the text is removed from a text field when br's visibility is hidden.</p>
 <form>
 <fieldset>
 <input id="test" type="text">
 </fieldset>
 </form>
 <script>

 var test = document.getElementById('test');
 test.focus();
 document.execCommand('InsertText', false, 'abc');
 document.execCommand('Delete', false, null);
 document.execCommand('Delete', false, null);
 document.execCommand('Delete', false, null);
 document.execCommand('InsertText', false, 'PASS');

 if (test.value != 'PASS')
     test.value = 'FAIL';

 if (window.layoutTestController) {
     layoutTestController.dumpAsText();
     test.parentNode.parentNode.style.display = 'none';
     document.writeln(test.value);
 }

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<style type="text/css">
	br {visibility:hidden}
	</style>
	</head>
	<body>
	<p>This test ensures WebKit does not lose focus when the text is removed from a text field when br's visibility is hidden.</p>
	<form>
	<fieldset>
	<input id="test" type="text">
	</fieldset>
	</form>
	<script>

	var test = document.getElementById('test');
	test.focus();
	document.execCommand('InsertText', false, 'abc');
	document.execCommand('Delete', false, null);
	document.execCommand('Delete', false, null);
	document.execCommand('Delete', false, null);
	document.execCommand('InsertText', false, 'PASS');

	if (test.value != 'PASS')
	test.value = 'FAIL';

	if (window.layoutTestController) {
	layoutTestController.dumpAsText();
	test.parentNode.parentNode.style.display = 'none';
	document.writeln(test.value);
	}

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