invoke-then.js (1300B)
1 // |reftest| async 2 // Copyright (C) 2019 Sergey Rubanov. All rights reserved. 3 // This code is governed by the BSD license found in the LICENSE file. 4 5 /*--- 6 description: > 7 Invocation of the instance's `then` method 8 esid: sec-promise.any 9 info: | 10 5. Let result be PerformPromiseAny(iteratorRecord, C, promiseCapability). 11 6. If result is an abrupt completion, then 12 a. If iteratorRecord.[[Done]] is false, set result to IteratorClose(iteratorRecord, result). 13 b. IfAbruptRejectPromise(result, promiseCapability). 14 15 Runtime Semantics: PerformPromiseAny 16 17 r. Perform ? Invoke(nextPromise, "then", « resultCapability.[[Resolve]], rejectElement »). 18 19 flags: [async] 20 features: [Promise.any, arrow-function] 21 ---*/ 22 23 let promise = Promise.resolve(); 24 let boundThen = promise.then.bind(promise); 25 let callCount = 0; 26 27 promise.then = function(resolver, rejectElement) { 28 assert.sameValue(this, promise); 29 assert.sameValue(typeof resolver, 'function'); 30 assert.sameValue(resolver.length, 1, 'resolver.length is 1'); 31 assert.sameValue(typeof rejectElement, 'function'); 32 assert.sameValue(rejectElement.length, 1, 'rejectElement.length is 0'); 33 callCount++; 34 return boundThen(resolver, rejectElement); 35 }; 36 37 Promise.any([promise]).then(() => { 38 assert.sameValue(callCount, 1); 39 $DONE(); 40 }, $DONE);