LayoutTests/fast/events/set-event-to-null.html - WebKit - Git at Google

 <html>
 <head>
 <script language="javascript">
 function log(s)
 {
     document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
 }

 function mouseOver(event)
 {
     if (event === null) {
         log("FAIL: After MouseEvent, event is null");
     } else {
         log("PASS: After MouseEvent, event is valid");
     }
 }

 function runTest() {
     var target = document.getElementById("target");
     var newEvent = document.createEvent("MouseEvent");
     newEvent.initMouseEvent("mouseover", false, false, window, 0, 10, 10, 10, 10, false, false, false, false, 0, target);
     target.dispatchEvent(newEvent);

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

 </script>
 </head>
 <body onLoad="runTest();">
 <div id="target" onMouseOver="mouseOver(event);">This test will trigger a mouse over of this element.
 We will then check to see if event was properly set (i.e., not null).
 This is in response to a v8 bug that can break window.event exposure if the client tries to manually set event.</div>
 <div id="console"></div>
 <script>
 if (!(event === undefined)) {
     log("FAIL: event does not begin as undefined");
 }
 event = null;
 if (!(event === null)) {
     log("FAIL: event was not successfully set to null");
 }
 </script>
 </body>
 </html>
	<html>
	<head>
	<script language="javascript">
	function log(s)
	{
	document.getElementById("console").appendChild(document.createTextNode(s + "\n"));
	}

	function mouseOver(event)
	{
	if (event === null) {
	log("FAIL: After MouseEvent, event is null");
	} else {
	log("PASS: After MouseEvent, event is valid");
	}
	}

	function runTest() {
	var target = document.getElementById("target");
	var newEvent = document.createEvent("MouseEvent");
	newEvent.initMouseEvent("mouseover", false, false, window, 0, 10, 10, 10, 10, false, false, false, false, 0, target);
	target.dispatchEvent(newEvent);

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

	</script>
	</head>
	<body onLoad="runTest();">
	<div id="target" onMouseOver="mouseOver(event);">This test will trigger a mouse over of this element.
	We will then check to see if event was properly set (i.e., not null).
	This is in response to a v8 bug that can break window.event exposure if the client tries to manually set event.</div>
	<div id="console"></div>
	<script>
	if (!(event === undefined)) {
	log("FAIL: event does not begin as undefined");
	}
	event = null;
	if (!(event === null)) {
	log("FAIL: event was not successfully set to null");
	}
	</script>
	</body>
	</html>