invoke-resolve.js (1278B)
1 // Copyright (C) 2015 the V8 project authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 description: > 6 Invocation of the constructor's `resolve` method 7 es6id: 25.4.4.1 8 info: | 9 11. Let result be PerformPromiseAll(iteratorRecord, C, promiseCapability). 10 11 [...] 12 13 25.4.4.1.1 Runtime Semantics: PerformPromiseAll 14 15 [...] 16 6. Repeat 17 [...] 18 i. Let nextPromise be Invoke(constructor, "resolve", «nextValue»). 19 ---*/ 20 21 var p1 = new Promise(function() {}); 22 var p2 = new Promise(function() {}); 23 var p3 = new Promise(function() {}); 24 var resolve = Promise.resolve; 25 var callCount = 0; 26 var current = p1; 27 var next = p2; 28 var afterNext = p3; 29 30 Promise.resolve = function(nextValue) { 31 assert.sameValue( 32 nextValue, current, '`resolve` invoked with next iterated value' 33 ); 34 assert.sameValue( 35 arguments.length, 1, '`resolve` invoked with a single argument' 36 ); 37 assert.sameValue(this, Promise, '`this` value is the constructor'); 38 39 current = next; 40 next = afterNext; 41 afterNext = null; 42 43 callCount += 1; 44 45 return resolve.apply(Promise, arguments); 46 }; 47 48 Promise.all([p1, p2, p3]); 49 50 assert.sameValue( 51 callCount, 3, '`resolve` invoked once for each iterated value' 52 ); 53 54 reportCompare(0, 0);