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// |reftest| async
// 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
es6id: 25.4.4.1
info: |
[...]
6. Let promiseCapability be NewPromiseCapability(C).
[...]
11. Let result be PerformPromiseAll(iteratorRecord, C, promiseCapability).
[...]
25.4.4.1.1 Runtime Semantics: PerformPromiseAll
[...]
6. Repeat
[...]
d. If next is false,
[...]
iii. If remainingElementsCount.[[value]] is 0,
1. Let valuesArray be CreateArrayFromList(values).
2. Let resolveResult be Call(resultCapability.[[Resolve]],
undefined, «valuesArray»).
3. ReturnIfAbrupt(resolveResult)
iv. Return resultCapability.[[Promise]].
7.3.16 CreateArrayFromList (elements)
[...]
2. Let array be ArrayCreate(0) (see 9.4.2.2).
9.4.2.2 ArrayCreate(length, proto)
[...]
4. If the proto argument was not passed, let proto be the intrinsic object
%ArrayPrototype%.
5. Let A be a newly created Array exotic object.
[...]
8. Set the [[Prototype]] internal slot of A to proto.
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 promise;
try {
Array.prototype.then = function(resolve) {
resolve(value);
};
promise = Promise.all([]);
} finally {
delete Array.prototype.then;
}
promise.then(function(val) {
if (val !== value) {
$DONE('The promise should be resolved with the expected value.');
return;
}
$DONE();
}, function() {
$DONE('The promise should not be rejected.');
});
|
