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<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>Tests that the arrow down key does not scroll by more than 1 element</title>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<script src="/tests/SimpleTest/paint_listener.js"></script>
<style>
.time-column {
width: 68px;
height: 28px;
overflow-y: scroll;
scroll-snap-type: y mandatory;
border-radius: 4px;
border: 1px solid red;
}
.time-item {
scroll-snap-align: center;
height: 100%;
}
</style>
</head>
<body>
<div class="time-column"></div>
<script type="application/javascript">
function waitForScrollEvent(target) {
return new Promise(resolve => {
target.addEventListener("scroll", resolve, { once: true });
});
}
async function test() {
const timeCol = document.querySelector('.time-column');
for (let i = 0; i < 60; i++) {
let item = document.createElement('div');
item.classList.add('time-item');
item.textContent = i;
timeCol.appendChild(item);
}
is(timeCol.scrollTop, 0, "should begin with no scroll (1)");
let waitForScroll = waitForScrollEvent(timeCol);
timeCol.focus();
window.synthesizeKey("KEY_ArrowDown");
await waitForScroll;
ok(timeCol.scrollTop > 0, "should have scrolled (2)");
ok(timeCol.scrollTop < 30, "should have not scrolled too far (3)");
}
waitUntilApzStable().then(test).then(subtestDone, subtestFailed);
</script>
</body>
</html>
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