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8bce46aff1
Adds experimental implementations of the yield and wait APIs being explored at https://github.com/WICG/scheduling-apis. When I asked the WHATWG folks about the possibility of standardizing the [awaitable versions of setTimeout/setImmediate](https://github.com/whatwg/html/issues/7340) that we have implemented in `timers/promises`, they pointed at the work in progress scheduling APIs draft as they direction they'll be going. While there is definitely a few thing in that draft that have questionable utility to Node.js, the yield and wait APIs map cleanly to the setImmediate and setTimeout we already have. Signed-off-by: James M Snell <jasnell@gmail.com> PR-URL: https://github.com/nodejs/node/pull/40909 Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com> Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com> Reviewed-By: Darshan Sen <raisinten@gmail.com>
51 lines
1.1 KiB
JavaScript
51 lines
1.1 KiB
JavaScript
'use strict';
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const common = require('../common');
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const { scheduler } = require('timers/promises');
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const { setTimeout } = require('timers');
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const {
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strictEqual,
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rejects,
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} = require('assert');
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async function testYield() {
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await scheduler.yield();
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process.emit('foo');
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}
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testYield().then(common.mustCall());
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queueMicrotask(common.mustCall(() => {
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process.addListener('foo', common.mustCall());
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}));
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async function testWait() {
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let value = 0;
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setTimeout(() => value++, 10);
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await scheduler.wait(15);
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strictEqual(value, 1);
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}
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testWait().then(common.mustCall());
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async function testCancelableWait1() {
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const ac = new AbortController();
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const wait = scheduler.wait(1e6, { signal: ac.signal });
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ac.abort();
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await rejects(wait, {
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code: 'ABORT_ERR',
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message: 'The operation was aborted',
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});
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}
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testCancelableWait1().then(common.mustCall());
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async function testCancelableWait2() {
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const wait = scheduler.wait(10000, { signal: AbortSignal.abort() });
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await rejects(wait, {
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code: 'ABORT_ERR',
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message: 'The operation was aborted',
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});
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}
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testCancelableWait2().then(common.mustCall());
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