LayoutTests/fast/events/selectstart-on-selectall.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body onselectstart="handler(event)">
 <p>This test ensures selectstart event fires when selecting all.</p>
 <script>

 if (window.testRunner) {
     testRunner.dumpAsText();
     testRunner.dumpEditingCallbacks();
 }

 var targetWasBody = true;
 var handlerCount = 0;
 var listenerCount = 0;

 function handler(event) {
     if (event.target != document.body)
         targetWasBody = false;
     handlerCount++;
 }

 document.body.addEventListener('selectstart', function (event) {
     if (event.target != document.body)
         targetWasBody = false;
     listenerCount++;
 });

 document.execCommand('SelectAll', false, null);

 if (handlerCount != 1)
     document.writeln("FAIL: selectionstart's event handler was called " + handlerCount + ' times');
 else if (listenerCount != 1)
     document.writeln("FAIL: selectionstart's event listener was called " + listenerCount + ' times');
 else if (!targetWasBody)
     document.writeln("FAIL: target node wasn't body");
 else if (window.getSelection().toString() != document.body.innerText)
     document.writeln("FAIL: some contents on document was not selected");
 else
     document.writeln("PASS");

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body onselectstart="handler(event)">
	<p>This test ensures selectstart event fires when selecting all.</p>
	<script>

	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.dumpEditingCallbacks();
	}

	var targetWasBody = true;
	var handlerCount = 0;
	var listenerCount = 0;

	function handler(event) {
	if (event.target != document.body)
	targetWasBody = false;
	handlerCount++;
	}

	document.body.addEventListener('selectstart', function (event) {
	if (event.target != document.body)
	targetWasBody = false;
	listenerCount++;
	});

	document.execCommand('SelectAll', false, null);

	if (handlerCount != 1)
	document.writeln("FAIL: selectionstart's event handler was called " + handlerCount + ' times');
	else if (listenerCount != 1)
	document.writeln("FAIL: selectionstart's event listener was called " + listenerCount + ' times');
	else if (!targetWasBody)
	document.writeln("FAIL: target node wasn't body");
	else if (window.getSelection().toString() != document.body.innerText)
	document.writeln("FAIL: some contents on document was not selected");
	else
	document.writeln("PASS");

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