// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- description: > Invocation of the instance's `then` method es6id: 25.4.4.1 info: | 11. Let result be PerformPromiseAll(iteratorRecord, C, promiseCapability). [...] 25.4.4.1.1 Runtime Semantics: PerformPromiseAll [...] 6. Repeat [...] r. Let result be Invoke(nextPromise, "then", «resolveElement, resultCapability.[[Reject]]»). ---*/ var p1 = new Promise(function() {}); var p2 = new Promise(function() {}); var p3 = new Promise(function() {}); var callCount = 0; var currentThis = p1; var nextThis = p2; var afterNextThis = p3; p1.then = p2.then = p3.then = function(a, b) { assert.sameValue(typeof a, 'function', 'type of first argument'); assert.sameValue( a.length, 1, 'ES6 25.4.1.3.2: The length property of a promise resolve function is 1.' ); assert.sameValue(typeof b, 'function', 'type of second argument'); assert.sameValue( b.length, 1, 'ES6 25.4.1.3.1: The length property of a promise reject function is 1.' ); assert.sameValue(arguments.length, 2, '`then` invoked with two arguments'); assert.sameValue(this, currentThis, '`this` value'); currentThis = nextThis; nextThis = afterNextThis; afterNextThis = null; callCount += 1; }; Promise.all([p1, p2, p3]); assert.sameValue(callCount, 3, '`then` invoked once for every iterated value'); reportCompare(0, 0);