tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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result-is-undefined-targetdesc-is-undefined.js (721B)

      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 undefined.
      8 info: |
      9    [[GetOwnProperty]] (P)
     10 
     11    ...
     12    14. If trapResultObj is undefined, then
     13        a. If targetDesc is undefined, return undefined.
     14    ...
     15 features: [Proxy]
     16 ---*/
     17 
     18 var t = {};
     19 var trapped;
     20 var p = new Proxy(t, {
     21  getOwnPropertyDescriptor: function(target, prop) {
     22    trapped = true;
     23    return;
     24  }
     25 });
     26 
     27 assert.sameValue(
     28  Object.getOwnPropertyDescriptor(p, "attr"),
     29  undefined
     30 );
     31 
     32 assert(trapped);
     33 
     34 reportCompare(0, 0);