tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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not-same-value-configurable-false-writable-false-throws.js (941B)

      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 es6id: 9.5.8
      5 description: >
      6    Throws if proxy return has not the same value for a non-writable,
      7    non-configurable property
      8 info: |
      9    [[Get]] (P, Receiver)
     10 
     11    13. If targetDesc is not undefined, then
     12        a. If IsDataDescriptor(targetDesc) and targetDesc.[[Configurable]] is
     13        false and targetDesc.[[Writable]] is false, then
     14            i. If SameValue(trapResult, targetDesc.[[Value]]) is false, throw a
     15            TypeError exception.
     16 features: [Proxy]
     17 ---*/
     18 
     19 var target = {};
     20 var p = new Proxy(target, {
     21  get: function() {
     22    return 2;
     23  }
     24 });
     25 
     26 Object.defineProperty(target, 'attr', {
     27  configurable: false,
     28  writable: false,
     29  value: 1
     30 });
     31 
     32 assert.throws(TypeError, function() {
     33  p.attr;
     34 });
     35 
     36 assert.throws(TypeError, function() {
     37  p['attr'];
     38 });
     39 
     40 reportCompare(0, 0);