1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // Flags: --allow-natives-syntax 6 7 function assertAsync(b, s) { 8 if (!b) { 9 %AbortJS(" FAILED!") 10 } 11 } 12 13 class P extends Promise { 14 constructor() { 15 super(...arguments) 16 return new Proxy(this, { 17 get: (_, key) => { 18 return key == 'then' ? 19 this.then.bind(this) : 20 this.constructor.resolve(20) 21 } 22 }) 23 } 24 } 25 26 let p = P.resolve(10) 27 p.key.then(v => assertAsync(v === 20)); 28
