third_party/blink/web_tests/accessibility/scroll-window-horiz-sends-notification.html - chromium/src - Git at Google

 <!DOCTYPE HTML>
 <html>
 <head>
 <script src="../resources/js-test.js"></script>
 <style>
 .bigbutton {
     display:block;
     width: 600px;
     height: 600px;
 }
 </style>
 </head>
 <body style="width: 2000px">

 <button class="bigbutton">One</button>
 <button class="bigbutton">Two</button>
 <button class="bigbutton">Three</button>

 <div id="console"></div>
 <script>

 description("This test ensures that scrolling the window sends a notification.");
 window.jsTestIsAsync = true;

 if (window.testRunner && window.accessibilityController) {
     testRunner.dumpAsText();

     window.scrollTo(0, 0);
     shouldBe("window.pageXOffset", "0");

     accessibilityController.addNotificationListener(function (target, notification) {
         if (target.role == 'AXRole: AXWebArea' && notification == 'ScrollPositionChanged') {
             debug('Got notification on web area');
             accessibilityController.removeNotificationListener();
             shouldBe("window.pageXOffset", "500");
             finishJSTest();
         }
     });

     window.setTimeout(function() {
         window.scrollTo(500, 0);
     }, 0);
 }

 </script>

 </body>
 </html>
	<!DOCTYPE HTML>
	<html>
	<head>
	<script src="../resources/js-test.js"></script>
	<style>
	.bigbutton {
	display:block;
	width: 600px;
	height: 600px;
	}
	</style>
	</head>
	<body style="width: 2000px">

	<button class="bigbutton">One</button>
	<button class="bigbutton">Two</button>
	<button class="bigbutton">Three</button>

	<div id="console"></div>
	<script>

	description("This test ensures that scrolling the window sends a notification.");
	window.jsTestIsAsync = true;

	if (window.testRunner && window.accessibilityController) {
	testRunner.dumpAsText();

	window.scrollTo(0, 0);
	shouldBe("window.pageXOffset", "0");

	accessibilityController.addNotificationListener(function (target, notification) {
	if (target.role == 'AXRole: AXWebArea' && notification == 'ScrollPositionChanged') {
	debug('Got notification on web area');
	accessibilityController.removeNotificationListener();
	shouldBe("window.pageXOffset", "500");
	finishJSTest();
	}
	});

	window.setTimeout(function() {
	window.scrollTo(500, 0);
	}, 0);
	}

	</script>

	</body>
	</html>