| <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> |
| 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(); |
| // Waiting till rAF is handled before the next iteration, to avoid residual callacks between iterations. |
| await animationFramePromise; |
| assert_less_than_equal(after, before) |
| assert_less_than_equal(after, getPendingRenderDeadlineCap()) |
| }, 'Check that the deadline is changed if there is a new requestAnimationFrame from within requestIdleCallback.'); |
| <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> |
