tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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throws-when-false.js (593B)

      1 // Copyright (C) 2019 Ecma International. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-object.preventextensions
      6 description: >
      7  Object.preventExtensions throws if O.[[PreventExtensions]]() returns false.
      8 info: |
      9  Object.preventExtensions ( O )
     10  ...
     11  2. Let status be ? O.[[PreventExtensions]]().
     12  3. If status is false, throw a TypeError exception.
     13 ---*/
     14 
     15 const p = new Proxy({}, {
     16  preventExtensions() {
     17    return false;
     18  },
     19 });
     20 
     21 assert.throws(TypeError, () => {
     22  Object.preventExtensions(p);
     23 });
     24 
     25 reportCompare(0, 0);