tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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__proto__-value-non-object.js (1988B)

      1 // Copyright (C) 2016 the V8 project authors. All rights reserved.
      2 // This code is governed by the BSD license found in the LICENSE file.
      3 /*---
      4 esid: sec-__proto__-property-names-in-object-initializers
      5 es6id: B.3.1
      6 description: >
      7  The value of the `__proto__` property key is not assigned to the
      8  [[Prototype]] internal slot, nor to a property named "__proto__" (non-Object,
      9  non-null value)
     10 info: |
     11  ...
     12  6. If propKey is the String value "__proto__" and if
     13     IsComputedPropertyKey(propKey) is false, then
     14     a. If Type(propValue) is either Object or Null, then
     15        [...]
     16     b. Return NormalCompletion(empty).
     17 features: [Symbol]
     18 ---*/
     19 
     20 var object;
     21 
     22 object = {
     23  __proto__: undefined
     24 };
     25 assert.sameValue(
     26  Object.getPrototypeOf(object),
     27  Object.prototype,
     28  'prototype (undefined)'
     29 );
     30 assert.sameValue(
     31  Object.getOwnPropertyDescriptor(object, '__proto__'),
     32  undefined,
     33  'property (undefined)'
     34 );
     35 
     36 object = {
     37  __proto__: 1
     38 };
     39 assert.sameValue(
     40  Object.getPrototypeOf(object),
     41  Object.prototype,
     42  'prototype (numeric primitive)'
     43 );
     44 assert.sameValue(
     45  Object.getOwnPropertyDescriptor(object, '__proto__'),
     46  undefined,
     47  'property (numeric primitive)'
     48 );
     49 
     50 object = {
     51  __proto__: false
     52 };
     53 assert.sameValue(
     54  Object.getPrototypeOf(object),
     55  Object.prototype,
     56  'prototype (boolean primitive)'
     57 );
     58 assert.sameValue(
     59  Object.getOwnPropertyDescriptor(object, '__proto__'),
     60  undefined,
     61  'property (boolean primitive)'
     62 );
     63 
     64 object = {
     65  __proto__: 'string literal'
     66 };
     67 assert.sameValue(
     68  Object.getPrototypeOf(object),
     69  Object.prototype,
     70  'prototype (string primitive)'
     71 );
     72 assert.sameValue(
     73  Object.getOwnPropertyDescriptor(object, '__proto__'),
     74  undefined,
     75  'property (string primitive)'
     76 );
     77 
     78 object = {
     79  __proto__: Symbol('')
     80 };
     81 assert.sameValue(
     82  Object.getPrototypeOf(object),
     83  Object.prototype,
     84  'prototype (symbol)'
     85 );
     86 assert.sameValue(
     87  Object.getOwnPropertyDescriptor(object, '__proto__'),
     88  undefined,
     89  'property (symbol)'
     90 );
     91 
     92 reportCompare(0, 0);