1 /*

     2  * Copyright (c) 2010, 2012, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  * 

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  * 

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  * 

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  * 

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  */

    23 

    24 /**

    25  * Change attributes of an existing property

    26  *

    27  * @test

    28  * @run

    29  */ 

    30 

    31 var obj = { x: 343 };

    32 

    33 for(i in obj) {

    34   print(i);

    35 }

    36 

    37 Object.defineProperty(obj, "x", {

    38    enumerable: false });

    39 

    40 // not-enumerable anymore

    41 for(i in obj) {

    42   print(i);

    43 }

    44 

    45 print(obj.x);

    46 obj.x = 42;

    47 print(obj.x);

    48 

    49 // make non-writable

    50 Object.defineProperty(obj, "x", {

    51     writable: false

    52 });

    53 

    54 obj.x = "hello";

    55 print(obj.x);

    56 

    57 print("done");

    58