| // 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 pending promise that is later fulfilled |
| es6id: 25.4.5.3 |
| info: | |
| [...] |
| 7. Return PerformPromiseThen(promise, onFulfilled, onRejected, |
| resultCapability). |
| |
| 25.4.5.3.1 PerformPromiseThen |
| [...] |
| 7. If the value of promise's [[PromiseState]] internal slot is "pending", |
| a. Append fulfillReaction as the last element of the List that is the |
| value of promise's [[PromiseFulfillReactions]] internal slot. |
| [...] |
| |
| 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 resolve; |
| var thenable = new Promise(function(resolve) { |
| resolve(value); |
| }); |
| var p1 = new Promise(function(_resolve) { |
| resolve = _resolve; |
| }); |
| var p2; |
| |
| p2 = p1.then(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.'); |
| }); |
| |
| resolve(); |