JDK-8030197.js revision 753:feceb45debac 
1/*
2 * Copyright (c) 2014, 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/**
26 * JDK-8030197: Nashorn: Object.defineProperty() can be lured to change fixed NaN property
27 *
28 * @test
29 * @run
30 */
31
32function str(n) {
33    var a = new Uint8Array(new Float64Array([n]).buffer);
34    return Array.apply(null, a).reduceRight(
35        function(acc, v){
36            return acc + (v < 10 ? "0" : "") + v.toString(16);
37        }, "");
38}
39
40var o = Object.defineProperty({}, "NaN", { value: NaN })
41var str1 = str(o.NaN);
42Object.defineProperty(o, "NaN", { value: 0/0 })
43var str2 = str(o.NaN);
44if (str1 != str2) {
45    fail("NaN bit pattern changed");
46}
47