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Test Info:
- Manifest: layout/generic/test/mochitest.toml
<!DOCTYPE HTML>
<html>
<head>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<script src="/tests/gfx/layers/apz/test/mochitest/apz_test_utils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="outer" style="overflow:auto; height:200px; border:2px dotted black; transform: translateY(1px)" onscroll="doneScroll()">
<div id="d" style="overflow:auto; height:102px;" onscroll="doneScroll()">
<div id="inner" style="height:100.1px; border:1px solid black; background:yellow;">Hello</div>
</div>
<div style="height:500px;"></div>
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
var sel = window.getSelection();
var outer = document.getElementById("outer");
var d = document.getElementById("d");
var inner = document.getElementById("inner");
var smoothScrollPref = "general.smoothScroll";
function innerScrollOffset() {
return inner.getBoundingClientRect().top - d.getBoundingClientRect().top;
}
var innerStartScrollOffset = innerScrollOffset();
var step = 0;
var wheelAndPaintDone = false;
async function doneScroll() {
++step;
switch (step) {
case 1:
is(innerScrollOffset(), innerStartScrollOffset, "Inner element should not have scrolled down");
ok(outer.scrollTop > 0, "Outer element should have scrolled down");
outer.scrollTop = 0;
break;
case 2:
// wait until APZ is ready to handle the wheel event, then send it
await promiseApzFlushedRepaints();
// Wait for paints to flush, so APZ is notified of the new scroll offset.
sendWheelAndPaint(inner, 4, 4,
{ deltaMode: WheelEvent.DOM_DELTA_LINE, deltaY: 1 },
function() {
wheelAndPaintDone = true;
doneTest();
});
break;
case 3:
is(innerScrollOffset(), innerStartScrollOffset, "Inner element should not have scrolled down");
ok(outer.scrollTop > 0, "Outer element should have scrolled down");
doneTest();
break;
}
}
function doneTest() {
// wait until wheelAndPaintDone has invoked its callback before we end the
// test, otherwise we might get calls to advanceTimeAndRefresh after we
// restore normal refresh, and that will screw up the next test.
if (wheelAndPaintDone && step == 3) {
SpecialPowers.DOMWindowUtils.restoreNormalRefresh();
SimpleTest.finish();
}
}
function test() {
sel.collapse(inner.firstChild, 2);
synthesizeKey("KEY_PageDown");
}
SimpleTest.waitForExplicitFinish();
SimpleTest.waitForFocus(function() {
SpecialPowers.pushPrefEnv({"set":[[smoothScrollPref, false],
["test.events.async.enabled", true]]}, test);
});
</script>
</pre>
</body>
</html>