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