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Tests for requestIdleCallback deadline computation (#31177)
* Tests for requestIdleCallback deadline computation Deadline should be: - capped at 50ms - capped at 1000/60 (~16ms) when there is a pending rAF callback - capped at the time of the next timeout - be updated when the above conditions change, during the callback itself See whatwg/html#7166 Co-authored-by: Philip Jägenstedt <philip@foolip.org>
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<!DOCTYPE html> | ||
<title>window.requestIdleCallback max idle period deadline (requestAnimationFrame).</title> | ||
<meta name="timeout" content="long"> | ||
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org" /> | ||
<script src="/resources/testharness.js"></script> | ||
<script src="/resources/testharnessreport.js"></script> | ||
<script src="resources/ric-utils.js"></script> | ||
<script> | ||
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promise_test(async () => { | ||
for (let i = 0; i < getRICRetryCount(); ++i) { | ||
const {before, after} = await new Promise(resolve => requestIdleCallback(async deadline => { | ||
const before = deadline.timeRemaining(); | ||
const animationFramePromise = new Promise(requestAnimationFrame); | ||
const after = deadline.timeRemaining(); | ||
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// Waiting till rAF is handled before the next iteration, to avoid residual callacks between iterations. | ||
await animationFramePromise; | ||
resolve({before, after}) | ||
})) | ||
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assert_less_than_equal(after, before) | ||
assert_less_than_equal(after, getPendingRenderDeadlineCap()) | ||
} | ||
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}, 'Check that the deadline is changed if there is a new requestAnimationFrame from within requestIdleCallback.'); | ||
</script> | ||
<h1>Test of requestIdleCallback deadline behavior</h1> | ||
<p>The test can pass accidentally as idle deadlines have a maximum but they can always be shorter. | ||
It runs multiple times to expose potential failures.</p> | ||
<div id="log"></div> |
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<!DOCTYPE html> | ||
<title>window.requestIdleCallback max idle period deadline (requestAnimationFrame).</title> | ||
<meta name="timeout" content="long"> | ||
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org" /> | ||
<script src="/resources/testharness.js"></script> | ||
<script src="/resources/testharnessreport.js"></script> | ||
<script src="resources/ric-utils.js"></script> | ||
<script> | ||
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promise_test(async done => { | ||
for (let i = 0; i < getRICRetryCount(); ++i) { | ||
requestAnimationFrame(() => {}) | ||
assert_less_than_equal(await getDeadlineForNextIdleCallback(), getPendingRenderDeadlineCap()) | ||
} | ||
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}, 'Check that the deadline is less than 16ms when there is a pending animation frame.'); | ||
</script> | ||
<h1>Test of requestIdleCallback deadline behavior</h1> | ||
<p>The test can pass accidentally as idle deadlines have a maximum but they can always be shorter. | ||
It runs multiple times to expose potential failures.</p> | ||
<div id="log"></div> |
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<!DOCTYPE html> | ||
<title>window.requestIdleCallback max idle period deadline (dynamic timoeout).</title> | ||
<meta name="timeout" content="long"> | ||
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org" /> | ||
<script src="/resources/testharness.js"></script> | ||
<script src="/resources/testharnessreport.js"></script> | ||
<script src="resources/ric-utils.js"></script> | ||
<script> | ||
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promise_test(async () => { | ||
for (let i = 0; i < getRICRetryCount(); ++i) { | ||
for (const timeout of [10, 20, 30]) { | ||
const {before, after} = await new Promise(resolve => requestIdleCallback(async deadline => { | ||
const before = deadline.timeRemaining(); | ||
const timerPromise = new Promise(resolve => step_timeout(resolve, timeout)); | ||
const after = deadline.timeRemaining(); | ||
await timerPromise; | ||
resolve({before, after}) | ||
})) | ||
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assert_less_than_equal(after, before) | ||
assert_less_than_equal(after, timeout) | ||
} | ||
} | ||
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}, 'Check that the deadline is changed if there is a new timeout from within requestIdleCallback.'); | ||
</script> | ||
<h1>Test of requestIdleCallback deadline behavior</h1> | ||
<p>The test can pass accidentally as idle deadlines have a maximum but they can always be shorter. | ||
It runs multiple times to expose potential failures.</p> | ||
<div id="log"></div> |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,20 @@ | ||
<!DOCTYPE html> | ||
<title>window.requestIdleCallback max idle period deadline.</title> | ||
<meta name="timeout" content="long"> | ||
<link rel="author" title="Noam Rosenthal" href="mailto:noam@webkit.org" /> | ||
<script src="/resources/testharness.js"></script> | ||
<script src="/resources/testharnessreport.js"></script> | ||
<script src="resources/ric-utils.js"></script> | ||
<script> | ||
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promise_test(async done => { | ||
for (let i = 0; i < getRICRetryCount(); ++i) | ||
assert_less_than_equal(await getDeadlineForNextIdleCallback(), 50) | ||
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}, 'Check that the deadline is less than 50ms.'); | ||
</script> | ||
<h1>Test of requestIdleCallback deadline behavior</h1> | ||
<p>This test validates that deadlines returned for requestIdleCallback are less than 50ms.</p> | ||
<p>The test can pass accidentally as idle deadlines have a maximum but they can always be shorter. | ||
It runs multiple times to expose potential failures.</p> | ||
<div id="log"></div> |
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@@ -0,0 +1,14 @@ | ||
function getDeadlineForNextIdleCallback() { | ||
return new Promise( | ||
resolve => | ||
requestIdleCallback(deadline => resolve(deadline.timeRemaining())) | ||
); | ||
} | ||
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function getPendingRenderDeadlineCap() { | ||
return 1000 / 60; | ||
} | ||
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function getRICRetryCount() { | ||
return 10; | ||
} |