// Copyright (C) 2015 the V8 project authors. All rights reserved. // This code is governed by the BSD license found in the LICENSE file. /*--- es6id: 9.5.9 description: > [[Set]] ( P, V, Receiver) Throws a TypeError when target property is an accessor not configurable and and set is undefined. info: | 14. If targetDesc is not undefined, then b. If IsAccessorDescriptor(targetDesc) and targetDesc.[[Configurable]] is false, then i. If targetDesc.[[Set]] is undefined, throw a TypeError exception. features: [Proxy] ---*/ var target = {}; var handler = { set: function(t, prop, value, receiver) { return true; } }; var p = new Proxy(target, handler); Object.defineProperty(target, 'attr', { configurable: false, set: undefined }); assert.throws(TypeError, function() { p.attr = 'bar'; }); assert.throws(TypeError, function() { p['attr'] = 'bar'; }); reportCompare(0, 0);