blob: 9df8932aafcf09af3c942f5fc1038287b7405f95 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
// 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();
|