| // Copyright (C) 2016 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| description: Resolving with a thenable object value from a rejected promise |
| es6id: 25.4.5.3 |
| info: | |
| [...] |
| 7. Return PerformPromiseThen(promise, onFulfilled, onRejected, |
| resultCapability). |
| |
| 25.4.5.3.1 PerformPromiseThen |
| [...] |
| 9. Else if the value of promise's [[PromiseState]] internal slot is |
| "rejected", |
| a. Let reason be the value of promise's [[PromiseResult]] internal slot. |
| b. Perform EnqueueJob("PromiseJobs", PromiseReactionJob, |
| «rejectReaction, reason»). |
| |
| 25.4.2.1 PromiseReactionJob |
| [...] |
| 8. Let status be Call(promiseCapability.[[Resolve]], undefined, |
| «handlerResult.[[value]]»). |
| [...] |
| |
| 25.4.1.3.2 Promise Resolve Functions |
| [...] |
| 8. Let then be Get(resolution, "then"). |
| 9. If then is an abrupt completion, then |
| [...] |
| 10. Let thenAction be then.[[value]]. |
| 11. If IsCallable(thenAction) is false, then |
| [...] |
| 12. Perform EnqueueJob ("PromiseJobs", PromiseResolveThenableJob, |
| «promise, resolution, thenAction») |
| flags: [async] |
| ---*/ |
| |
| var value = {}; |
| var thenable = new Promise(function(resolve) { |
| resolve(value); |
| }); |
| var p1 = new Promise(function(_, reject) { |
| reject(); |
| }); |
| var p2; |
| |
| p2 = p1.then(function() {}, function() { |
| return thenable; |
| }); |
| |
| p2.then(function(x) { |
| if (x !== value) { |
| $DONE('The promise should be fulfilled with the resolution value of the provided promise.'); |
| return; |
| } |
| |
| $DONE(); |
| }, function() { |
| $DONE('The promise should not be rejected.'); |
| }); |