-
Notifications
You must be signed in to change notification settings - Fork 460
/
resolve-pending-fulfilled-poisoned-then.js
53 lines (46 loc) · 1.35 KB
/
resolve-pending-fulfilled-poisoned-then.js
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
53
// 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 an object with a "poisoned" `then` property 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
a. Return RejectPromise(promise, then.[[value]]).
flags: [async]
---*/
var value = {};
var resolve;
var poisonedThen = Object.defineProperty({}, 'then', {
get: function() {
throw value;
}
});
var p1 = new Promise(function(_resolve) {
resolve = _resolve;
});
var p2;
p2 = p1.then(function() {
return poisonedThen;
});
p2.then(function(x) {
$DONE('The promise should not be fulfilled.');
}, function(x) {
if (x !== value) {
$DONE('The promise should be rejected with the thrown exception.');
return;
}
$DONE();
});
resolve();