46 lines
1.5 KiB
HTML
46 lines
1.5 KiB
HTML
<!doctype html>
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1866773">
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<style>
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#container {
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width: 100px;
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height: 100px;
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border: 1px;
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}
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#child {
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height: 200px;
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}
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</style>
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<div id="container">
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<div id="child"></div>
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</div>
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<script>
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let container = document.getElementById("container");
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let child = document.getElementById("child");
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let InspectorUtils = SpecialPowers.wrap(window).InspectorUtils;
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const kDuration = 200;
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promise_test(async function(t) {
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await SpecialPowers.pushPrefEnv({
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set: [
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["ui.useOverlayScrollbars", 1],
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["ui.scrollbarFadeDuration", kDuration],
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]
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});
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for (let type of ["transitionstart", "transitionend"]) {
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container.addEventListener(type, t.unreached_func(`Shouldn't see ${type} event on #container`));
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}
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// This creates scrollbars and triggers activation.
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container.style.overflow = "scroll";
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container.getBoundingClientRect();
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let scrollbars = InspectorUtils.getChildrenForNode(container, true, true).filter(child => SpecialPowers.wrap(child).nodeName.toLowerCase() == "scrollbar");
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assert_equals(scrollbars.length, 2, "Should have two scrollbars");
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await new Promise(r => t.step_timeout(r, kDuration));
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await new Promise(r => requestAnimationFrame(r));
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assert_true(true, "No scrollbar event should've happened by now");
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// FIXME: This doesn't seem to be done automatically by the test harness in WPT
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await SpecialPowers.popPrefEnv();
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});
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</script>
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