tor-browser

The Tor Browser
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consistent-writable-regexp-dollar1.js (848B)

      1 // Copyright (C) 2017 Claude Pache. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-invariants-of-the-essential-internal-methods
      5 description: >
      6  A property made non-writable, non-configurable must not be reported as writable
      7  ("$1" property of the RegExp built-in)
      8 info: |
      9  [[GetOwnProperty]] (P)
     10  [...]
     11  - If the [[Writable]] attribute may change from false to true,
     12    then the [[Configurable]] attribute must be true..
     13  [...]
     14  (This invariant was violated for the specific property under test by at least
     15  one implementation as of January 2017.)
     16 ---*/
     17 
     18 if (Reflect.defineProperty(RegExp, '$1', {
     19    writable: false,
     20    configurable: false
     21  })) {
     22  var desc = Reflect.getOwnPropertyDescriptor(RegExp, '$1');
     23  assert.sameValue(desc.writable, false);
     24 }
     25 
     26 reportCompare(0, 0);