tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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symbol-object-contains-symbol-properties-strict-strict.js (938B)

      1 'use strict';
      2 // Copyright (C) 2013 the V8 project authors. All rights reserved.
      3 // This code is governed by the BSD license found in the LICENSE file.
      4 /*---
      5 es6id: 19.4
      6 description: >
      7    Object.preventExtensions(obj) where obj contains symbol properties.
      8 flags: [onlyStrict]
      9 features: [Symbol]
     10 ---*/
     11 var symA = Symbol("A");
     12 var symB = Symbol("B");
     13 var symC = Symbol("C");
     14 var obj = {};
     15 obj[symA] = 1;
     16 Object.preventExtensions(obj);
     17 obj[symA] = 2;
     18 
     19 assert.throws(TypeError, function() {
     20  obj[symB] = 1;
     21 });
     22 
     23 assert.throws(TypeError, function() {
     24  Object.defineProperty(obj, symC, {
     25    value: 1
     26  });
     27 });
     28 
     29 assert.sameValue(obj[symA], 2, "The value of `obj[symA]` is `2`");
     30 assert.sameValue(delete obj[symA], true, "`delete obj[symA]` is `true`");
     31 assert.sameValue(obj[symB], undefined, "The value of `obj[symB]` is `undefined`");
     32 assert.sameValue(obj[symC], undefined, "The value of `obj[symC]` is `undefined`");
     33 
     34 reportCompare(0, 0);