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Test Info:

<meta charset="utf-8">
<title>Various keyboard scrolling tests</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script type="application/javascript" src="apz_test_utils.js"></script>
<script type="application/javascript" src="apz_test_native_event_utils.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<script type="application/javascript">
var bug1756529_prefs= [
// Increase distance of line scroll (units here are "number of lines") so
// that a smooth scroll animation reliably takes multiple frames.
["toolkit.scrollbox.verticalScrollDistance", 5],
// The test performs a single-tap gesture between test cases to cancel the
// animation from the previous test case. For test cases that run fast (e.g.
// instant scrolling), two single-taps could occur close enough in succession
// that they get interpreted as a double-tap.
["apz.allow_double_tap_zooming", false]
var subtests = [
// Run helper_bug1756529.html twice, first exercising the main-thread keyboard
// scrolling codepaths (e.g. PresShell::ScrollPage()), and once exercising the
// APZ keyboard scrolling codepaths.
{"file": "helper_bug1756529.html", prefs: bug1756529_prefs},
{"file": "helper_bug1756529.html", prefs: [...bug1756529_prefs,
["", true]]},
if (isKeyApzEnabled()) {
window.onload = function() {
.then(SimpleTest.finish, SimpleTest.finishWithFailure);
} else {
SimpleTest.ok(true, "Keyboard APZ is disabled");
<a target="_blank" href="">Async key scrolling test</a>