// 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 Promise.all resolve element function is called twice in a row. 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, Test262Error.thrower); } Constructor.resolve = function(v) { return v; }; var p1OnFulfilled; var p1 = { then: function(onFulfilled, onRejected) { p1OnFulfilled = onFulfilled; } }; var p2 = { then: function(onFulfilled, onRejected) { onFulfilled("p2-fulfill"); onFulfilled("p2-fulfill-unexpected"); } }; 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, 0, "callCount after call to all()"); p1OnFulfilled("p1-fulfill"); assert.sameValue(callCount, 1, "callCount after resolving p1"); reportCompare(0, 0);