JSTests/test262/test/built-ins/Object/keys/15.2.3.14-5-b-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-b-1
description: Object.keys - Verify that 'index' of returned array is ascend by 1
---*/

        var obj = { prop1: 100, prop2: 200, prop3: 300 };

        var array = Object.keys(obj);

        var idx = 0;
        for (var index in array) {
            if (array.hasOwnProperty(index)) {
                assert.sameValue(index, idx.toString(), 'index');
                idx++;
            }
        }