JSTests/test262/test/built-ins/Object/defineProperty/15.2.3.6-4-619.js

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

/*---
es5id: 15.2.3.6-4-619
description: >
    ES5 Attributes - all attributes in Array.prototype.reduce are
    correct
---*/

var desc = Object.getOwnPropertyDescriptor(Array.prototype, "reduce");

var propertyAreCorrect = (desc.writable === true && desc.enumerable === false && desc.configurable === true);

var temp = Array.prototype.reduce;

Array.prototype.reduce = "2010";

var isWritable = (Array.prototype.reduce === "2010");

var isEnumerable = false;

for (var prop in Array.prototype) {
  if (prop === "reduce") {
    isEnumerable = true;
  }
}

delete Array.prototype.reduce;

var isConfigurable = !Array.prototype.hasOwnProperty("reduce");

assert(propertyAreCorrect, 'propertyAreCorrect !== true');
assert(isWritable, 'isWritable !== true');
assert.sameValue(isEnumerable, false, 'isEnumerable');
assert(isConfigurable, 'isConfigurable !== true');