// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- es6id: 26.1.13 description: > Return false if target property turns to a data descriptor and receiver property is an accessor descriptor. info: | 26.1.13 Reflect.set ( target, propertyKey, V [ , receiver ] ) ... 4. If receiver is not present, then a. Let receiver be target. 5. Return target.[[Set]](key, V, receiver). 9.1.9 [[Set]] ( P, V, Receiver) ... 4. If ownDesc is undefined, then a. Let parent be O.[[GetPrototypeOf]](). b. ReturnIfAbrupt(parent). c. If parent is not null, then i. Return parent.[[Set]](P, V, Receiver). d. Else, ii. Let ownDesc be the PropertyDescriptor{[[Value]]: undefined, [[Writable]]: true, [[Enumerable]]: true, [[Configurable]]: true}. 5. If IsDataDescriptor(ownDesc) is true, then a. If ownDesc.[[Writable]] is false, return false. b. If Type(Receiver) is not Object, return false. c. Let existingDescriptor be Receiver.[[GetOwnProperty]](P). d. ReturnIfAbrupt(existingDescriptor). e. If existingDescriptor is not undefined, then i. If IsAccessorDescriptor(existingDescriptor) is true, return false. ... features: [Reflect, Reflect.set] ---*/ var receiver = {}; var fn = function() {}; Object.defineProperty(receiver, 'p', { set: fn }); var o1 = {}; var result = Reflect.set(o1, 'p', 42, receiver); assert.sameValue( result, false, 'target has no own `p` and receiver.p has an accessor descriptor' ); assert.sameValue( Object.getOwnPropertyDescriptor(receiver, 'p').set, fn, 'receiver.p is not changed' ); assert.sameValue(o1.hasOwnProperty('p'), false, 'target.p is not set'); var o2 = { p: 43 }; result = Reflect.set(o2, 'p', 42, receiver); assert.sameValue( result, false, 'target.p has a data descriptor and receiver.p has an accessor descriptor' ); assert.sameValue( Object.getOwnPropertyDescriptor(receiver, 'p').set, fn, 'receiver.p is not changed' ); assert.sameValue(o2.p, 43, 'target.p is not changed'); reportCompare(0, 0);