JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-4-117.js

// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
es5id: 15.2.3.6-4-117
description: >
    Object.defineProperty - 'O' is an Array, test the length property
    of 'O' is own data property that overrides an inherited data
    property (15.4.5.1 step 1)
---*/

var arrObj = [0, 1, 2];
var arrProtoLen;

assert.throws(TypeError, function() {
  arrProtoLen = Array.prototype.length;
  Array.prototype.length = 0;


  Object.defineProperty(arrObj, "2", {
    configurable: false
  });

  Object.defineProperty(arrObj, "length", {
    value: 1
  });
});
assert.sameValue(arrObj.length, 3, 'arrObj.length');
assert.sameValue(Array.prototype.length, 0, 'Array.prototype.length');