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 
  32 function 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 
  40 var o = Object.defineProperty({}, "NaN", { value: NaN })
  41 var str1 = str(o.NaN);
  42 Object.defineProperty(o, "NaN", { value: 0/0 })
  43 var str2 = str(o.NaN);
  44 if (str1 != str2) {
  45     fail("NaN bit pattern changed");
  46 }