test262/test/built-ins/JSON/parse/S15.12.2_A1.js

// Copyright 2011 the Sputnik authors.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: JSON.parse must create a property with the given property name
es5id: 15.12.2_A1
description: Tests that JSON.parse treats "__proto__" as a regular property name
---*/

var x = JSON.parse('{"__proto__":[]}');
if (Object.getPrototypeOf(x) !== Object.prototype) {
  $ERROR('#1: JSON.parse confused by "__proto__"');
}
if (!Array.isArray(x.__proto__)) {
  $ERROR('#2: JSON.parse did not set "__proto__" as a regular property');
}