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Test Info:
- This WPT test may be referenced by the following Test IDs:
- /long-animation-frame/tentative/loaf-first-ui-event.html - WPT Dashboard Interop Dashboard
<!DOCTYPE HTML>
<meta charset=utf-8>
<title>Long Animation Frame Timing: first UI Event</title>
<meta name="timeout" content="long">
<script src=/resources/testdriver.js></script>
<script src=/resources/testdriver-actions.js></script>
<script src=/resources/testdriver-vendor.js></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/utils.js"></script>
<body>
<h1>Long Animation Frame: First UI Event</h1>
<div id="log"></div>
<script>
promise_test(async t => {
const button = document.createElement("button");
button.innerText = "Click";
document.body.appendChild(button);
t.add_cleanup(() => button.remove());
const eventPromise = new Promise(resolve => button.addEventListener("click", event => {
busy_wait();
resolve(event);
}));
const entryPromise = expect_long_frame_with_script(() => {
test_driver.click(button);
}, s => s.invoker === "BUTTON.onclick", t);
await new Promise(resolve => t.step_timeout(resolve, 0));
const event = await eventPromise;
const [entry] = await entryPromise;
assert_equals(entry.firstUIEventTimestamp, event.timeStamp);
}, "LoAF should expose firstUIEventTimestamp for click events");
promise_test(async t => {
const button = document.createElement("button");
button.innerText = "Hover";
document.body.appendChild(button);
t.add_cleanup(() => button.remove());
let expectedTimestamp = null;
const entryPromise = expect_long_frame_with_script(async () => {
const eventPromise = new Promise(resolve => button.addEventListener("pointermove", event => {
busy_wait();
expectedTimestamp = event.timeStamp;
resolve();
}));
const actions = new test_driver.Actions()
.pointerMove(0, 0, {origin: button})
.pointerDown()
.pointerUp();
await actions.send();
await eventPromise;
}, (script, entry) =>
script.invoker === "BUTTON.onpointermove" &&
entry.firstUIEventTimestamp === expectedTimestamp, t);
}, "LoAF should expose firstUIEventTimestamp for pointermove events");
promise_test(async t => {
const button = document.createElement("button");
button.innerText = "Click";
document.body.appendChild(button);
t.add_cleanup(() => button.remove());
let firstUIEventTimestamp = null;
const eventPromise = new Promise(resolve => button.addEventListener("click", event => {
if (firstUIEventTimestamp)
resolve(event);
else {
firstUIEventTimestamp = event.timeStamp;
busy_wait();
}
}));
const entryPromise = expect_long_frame_with_script(() => {
test_driver.click(button);
test_driver.click(button);
}, s => s.invoker === "BUTTON.onclick", t);
const [event, [entry]] = await Promise.all([eventPromise, entryPromise]);
assert_equals(entry.firstUIEventTimestamp, firstUIEventTimestamp);
}, "firstUIEventTimestamp doesn't have to come from a long script");
</script>
</body>