resolved-sequence-with-rejections.js (1745B)
1 // |reftest| async 2 // Copyright (C) 2020 Rick Waldron. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 esid: sec-promise.race 7 description: Resolution ticks are set in a predictable sequence 8 info: | 9 PerformPromiseRace 10 11 Repeat, 12 Let next be IteratorStep(iteratorRecord). 13 If next is an abrupt completion, set iteratorRecord.[[Done]] to true. 14 ReturnIfAbrupt(next). 15 If next is false, then 16 Set iteratorRecord.[[Done]] to true. 17 Return resultCapability.[[Promise]]. 18 Let nextValue be IteratorValue(next). 19 If nextValue is an abrupt completion, set iteratorRecord.[[Done]] to true. 20 ReturnIfAbrupt(nextValue). 21 Let nextPromise be ? Call(promiseResolve, constructor, « nextValue »). 22 Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], resultCapability.[[Reject]] »). 23 24 flags: [async] 25 includes: [compareArray.js, promiseHelper.js] 26 ---*/ 27 28 let a = new Promise((_, reject) => reject('a')); 29 let b = new Promise((_, reject) => reject('b')); 30 let sequence = [1]; 31 Promise.all([ 32 a.catch(() => { 33 sequence.push(3); 34 assert.sameValue(sequence.length, 3); 35 return checkSequence(sequence, 'Expected to be called first.'); 36 }), 37 Promise.race([a, b]).catch(() => { 38 sequence.push(5); 39 assert.sameValue(sequence.length, 5); 40 return checkSequence(sequence, 'Expected to be called third.'); 41 }), 42 b.catch(() => { 43 sequence.push(4); 44 assert.sameValue(sequence.length, 4); 45 return checkSequence(sequence, 'Expected to be called second.'); 46 }) 47 ]).then(result => { 48 assert.compareArray(result, [true, true, true]); 49 assert.sameValue(sequence.length, 5); 50 checkSequence(sequence); 51 }).then($DONE, $DONE); 52 53 sequence.push(2);