| // Copyright (C) 2020 Rick Waldron. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| |
| /*--- |
| esid: sec-promise.race |
| description: > |
| Resolution ticks are set in a predictable sequence of mixed fulfilled and rejected promises |
| info: | |
| PerformPromiseRace |
| |
| Repeat, |
| Let next be IteratorStep(iteratorRecord). |
| If next is an abrupt completion, set iteratorRecord.[[Done]] to true. |
| ReturnIfAbrupt(next). |
| If next is false, then |
| Set iteratorRecord.[[Done]] to true. |
| Return resultCapability.[[Promise]]. |
| Let nextValue be IteratorValue(next). |
| If nextValue is an abrupt completion, set iteratorRecord.[[Done]] to true. |
| ReturnIfAbrupt(nextValue). |
| Let nextPromise be ? Call(promiseResolve, constructor, « nextValue »). |
| Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], resultCapability.[[Reject]] »). |
| |
| flags: [async] |
| includes: [promiseHelper.js] |
| ---*/ |
| |
| let a = Promise.reject(''); |
| let b = new Promise(resolve => resolve('')); |
| let c = new Promise((_, reject) => reject('')); |
| let sequence = [1]; |
| Promise.all([ |
| a.catch(() => { |
| sequence.push(3); |
| }), |
| Promise.race([a, b, c]).then(() => { |
| // This should not be present when the final |
| // sequence is evaluated. |
| sequence.push(5); |
| }), |
| b.then(() => { |
| sequence.push(4); |
| }), |
| ]).catch(() => { |
| assert.sameValue(sequence.length, 4); |
| checkSequence(sequence); |
| }).then($DONE, $DONE); |
| sequence.push(2); |