tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
Log | Files | Refs | README | LICENSE

mapped-arguments-nonwritable-nonconfigurable-1.js (902B)

      1 // Copyright (C) 2015 André Bargull. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 info: Mapped arguments object with non-configurable property
      6 description: >
      7    Mapped arguments property is changed to non-writable and
      8    non-configurable. Perform property attribute changes with two
      9    consecutive [[DefineOwnProperty]] calls. Mapped values are
     10    unchanged, mapping itself is removed.
     11 flags: [noStrict]
     12 ---*/
     13 
     14 function argumentsNonWritableThenNonConfigurable(a) {
     15  Object.defineProperty(arguments, "0", {writable: false});
     16  Object.defineProperty(arguments, "0", {configurable: false});
     17  assert.sameValue(a, 1);
     18  assert.sameValue(arguments[0], 1);
     19 
     20  // Postcondition: Arguments mapping is removed.
     21  a = 2;
     22  assert.sameValue(a, 2);
     23  assert.sameValue(arguments[0], 1);
     24 }
     25 argumentsNonWritableThenNonConfigurable(1);
     26 
     27 reportCompare(0, 0);