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<html>
<script src="../js/resources/js-test-pre.js"></script>
<body>
<div id="container" style="overflow: auto; width: 500px; height: 500px">
<div style="height: 5000px; width: 5000px;"></div>
</div>
<script>
description('Checks that the scroll event fires on elements asychronously and only once.');
var eventCount = 0;
var doneTimeout;
function scrollHandler(event)
{
eventCount++;
if (eventCount == 1) {
debug('Scroll event bubbles: ' + event.bubbles);
var container = document.getElementById('container');
var scrollX = container.scrollLeft;
var scrollY = container.scrollTop;
testPassed('Scroll position: (' + scrollX + ', ' + scrollY + ')');
// Don't call notifyDone straight away, in case there's another scroll event coming.
doneTimeout = setTimeout(finishJSTest, 100);
} else {
clearTimeout(doneTimeout);
testFailed('Scroll handler was invoked ' + eventCount + ' times');
finishJSTest();
}
}
onload = function()
{
var container = document.getElementById('container');
container.addEventListener('scroll', scrollHandler, false);
container.scrollTop = 100;
if (eventCount > 0) {
testFailed('Scroll event fired synchronously');
finishJSTest();
}
container.scrollTop = 200;
}
var jsTestIsAsync = true;
</script>
</body>
</html>
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