tor-browser

The Tor Browser
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redefine-length-with-various-values-and-configurable-true.js (898B)

      1 // Copyright (c) 2020 Rick Waldron.  All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 
      4 /*---
      5 esid: sec-array-exotic-objects-defineownproperty-p-desc
      6 description: >
      7  Redefining "length" to `configurable: true` throws a TypeError exception
      8 info: |
      9  ArraySetLength ( A, Desc )
     10 
     11  ValidateAndApplyPropertyDescriptor ( O, P, extensible, Desc, current )
     12 ---*/
     13 
     14 let a = [1];
     15 
     16 assert.throws(TypeError, () => {
     17  Object.defineProperty(a, "length", {
     18    configurable: true
     19  });
     20 });
     21 assert.throws(TypeError, () => {
     22  Object.defineProperty(a, "length", {
     23    value: 1,
     24    configurable: true
     25  });
     26 });
     27 assert.throws(TypeError, () => {
     28  Object.defineProperty(a, "length", {
     29    value: 2,
     30    configurable: true
     31  });
     32 });
     33 assert.throws(TypeError, () => {
     34  Object.defineProperty(a, "length", {
     35    value: 3,
     36    configurable: true
     37  });
     38 });
     39 
     40 reportCompare(0, 0);