| // Copyright (C) 2015 the V8 project authors. All rights reserved. |
| // This code is governed by the BSD license found in the LICENSE file. |
| /*--- |
| es6id: 9.5.10 |
| description: > |
| [[Delete]] (P) |
| |
| A property cannot be reported as deleted, if it exists as a non-configurable |
| own property of the target object. |
| info: | |
| 14. If targetDesc.[[Configurable]] is false, throw a TypeError exception. |
| features: [Proxy] |
| ---*/ |
| |
| var target = {}; |
| var p = new Proxy(target, { |
| deleteProperty: function() { |
| return true; |
| } |
| }); |
| |
| Object.defineProperty(target, "attr", { |
| configurable: false, |
| value: 1 |
| }); |
| |
| assert.throws(TypeError, function() { |
| delete p.attr; |
| }); |
