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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>No snapping occurs if there is no valid snap position</title>
<script src="apz_test_utils.js"></script>
<script src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
div {
position: absolute;
}
#scroller {
width: 100%;
height: 500px;
overflow-y: scroll;
scroll-snap-type: y mandatory;
}
.child {
width: 100%;
height: 100px;
background-color: blue;
}
</style>
</head>
<body>
<div id="scroller">
<div class="child" style="top: 0px;"></div>
<div style="width: 100%; height: 2000px;"></div>
<div class="child" style="top: 1000px;"></div>
</div>
<script type="application/javascript">
async function test() {
await promiseMoveMouseAndScrollWheelOver(scroller, 100, 100);
ok(scroller.scrollTop > 0, "Scroll should happen some amount");
}
waitUntilApzStable()
.then(test)
.then(subtestDone, subtestFailed);
</script>
</body>
</html>