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// Copyright (C) 2015 André Bargull. All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.
/*---
es6id: 25.4.4.1.1
description: >
Cannot tamper remainingElementsCount when two Promise.all resolve element functions are called in succession.
info: |
Runtime Semantics: PerformPromiseAll( iteratorRecord, constructor, resultCapability)
...
4. Let remainingElementsCount be a new Record { [[value]]: 1 }.
...
6.d ...
ii. Set remainingElementsCount.[[value]] to remainingElementsCount.[[value]] − 1.
iii. If remainingElementsCount.[[value]] is 0,
1. Let valuesArray be CreateArrayFromList(values).
2. Let resolveResult be Call(resultCapability.[[Resolve]], undefined, «valuesArray»).
3. ReturnIfAbrupt(resolveResult).
...
25.4.4.1.2 Promise.all Resolve Element Functions
1. Let alreadyCalled be the value of F's [[AlreadyCalled]] internal slot.
2. If alreadyCalled.[[value]] is true, return undefined.
3. Set alreadyCalled.[[value]] to true.
...
---*/
var callCount = 0;
function Constructor(executor) {
function resolve(values) {
callCount += 1;
assert(Array.isArray(values), "values is array");
assert.sameValue(values.length, 3, "values length");
assert.sameValue(values[0], "p1-fulfill", "values[0]");
assert.sameValue(values[1], "p2-fulfill", "values[1]");
assert.sameValue(values[2], "p3-fulfill", "values[2]");
}
executor(resolve, $ERROR);
}
Constructor.resolve = function(v) {
return v;
};
var p1OnFulfilled;
var p1 = {
then: function(onFulfilled, onRejected) {
p1OnFulfilled = onFulfilled;
}
};
var p2 = {
then: function(onFulfilled, onRejected) {
p1OnFulfilled("p1-fulfill");
onFulfilled("p2-fulfill");
}
};
var p3 = {
then: function(onFulfilled, onRejected) {
onFulfilled("p3-fulfill");
}
};
assert.sameValue(callCount, 0, "callCount before call to all()");
Promise.all.call(Constructor, [p1, p2, p3]);
assert.sameValue(callCount, 1, "callCount after call to all()");
|
