tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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result-is-undefined-targetdesc-is-not-configurable.js (824B)

      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: 9.5.5
      5 description: >
      6    Throws a TypeError exception if trap result is undefined and target property
      7    descriptor is not configurable
      8 info: |
      9    [[GetOwnProperty]] (P)
     10 
     11    ...
     12    14. If trapResultObj is undefined, then
     13        ...
     14        b. If targetDesc.[[Configurable]] is false, throw a TypeError exception.
     15    ...
     16 features: [Proxy]
     17 ---*/
     18 
     19 var target = {};
     20 Object.defineProperty(target, "foo", {
     21  configurable: false,
     22  enumerable: false,
     23  value: 1
     24 });
     25 
     26 var p = new Proxy(target, {
     27  getOwnPropertyDescriptor: function(t, prop) {
     28    return;
     29  }
     30 });
     31 
     32 assert.throws(TypeError, function() {
     33  Object.getOwnPropertyDescriptor(p, "foo");
     34 });
     35 
     36 reportCompare(0, 0);