JSTests/test262/test/built-ins/Object/keys/15.2.3.14-5-1.js

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

/*---
es5id: 15.2.3.14-5-1
description: >
    Object.keys - own enumerable data property of 'O' is defined in
    returned array
---*/

var obj = {};

Object.defineProperty(obj, "prop", {
  value: 1003,
  enumerable: true,
  configurable: true
});

var arr = Object.keys(obj);

assert(arr.hasOwnProperty(0), 'arr.hasOwnProperty(0) !== true');
assert.sameValue(arr[0], "prop", 'arr[0]');