mozilla-central/gfx/layers/apz/test/mochitest/test_scroll_subframe_scrollbar.html

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Test Info: Warnings

<!DOCTYPE HTML>
<html>
<head>
<title>Test scrolling subframe scrollbars</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
<style>
p {
width:200px;
height:200px;
border:solid 1px black;
}
</style>
</head>
<body>
<p id="subframe">
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</p>
<script clss="testbody" type="text/javascript">
var DefaultEvent = {
deltaMode: WheelEvent.DOM_DELTA_LINE,
deltaX: 0, deltaY: 1,
lineOrPageDeltaX: 0, lineOrPageDeltaY: 1,
};
var ScrollbarWidth = 0;
async function test() {
var subframe = document.getElementById("subframe");
var oldClientWidth = subframe.clientWidth;
subframe.style.overflow = "auto";
subframe.getBoundingClientRect();
await promiseAllPaintsDone(null, /*flush=*/true);
ScrollbarWidth = oldClientWidth - subframe.clientWidth;
if (!ScrollbarWidth) {
// Probably we have overlay scrollbars - abort the test.
ok(true, "overlay scrollbars - skipping test");
return;
}
ok(subframe.scrollHeight > subframe.clientHeight, "subframe should have scrollable content");
// Send a wheel event roughly to where we think the trackbar is. We pick a
// point at the bottom, in the middle of the trackbar, where the slider is
// unlikely to be (since it starts at the top).
var posX = subframe.clientWidth + (ScrollbarWidth / 2);
var posY = subframe.clientHeight - 20;
var oldScrollTop = subframe.scrollTop;
await new Promise(resolve => {
sendWheelAndPaint(subframe, posX, posY, DefaultEvent, resolve);
});
ok(subframe.scrollTop > oldScrollTop, "subframe should have scrolled");
}
SimpleTest.waitForExplicitFinish();
pushPrefs([["general.smoothScroll", false],
["mousewheel.transaction.timeout", 0],
["mousewheel.transaction.ignoremovedelay", 0],
["test.events.async.enabled", true]])
.then(waitUntilApzStable)
.then(test)
.then(SimpleTest.finish, SimpleTest.finishWithFailure);
</script>
</body>
</html>