1 /*
   2  * Copyright (c) 2015, 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  * JDK-8141407: Wrong evaluation of a != a when a = NaN
  26  *
  27  * @test
  28  * @run
  29  */
  30 
  31 function expectNotEqualToSelf(a) {
  32     Assert.assertFalse(a == a);
  33     Assert.assertFalse(a === a);
  34     Assert.assertTrue(a != a);
  35     Assert.assertTrue(a !== a);
  36 }
  37 
  38 // In previous versions of Nashorn this failed only on the second assignment,
  39 // because only then the property slot was widened to object.
  40 var a = NaN;
  41 expectNotEqualToSelf(a);
  42 a = {};
  43 a = NaN;
  44 expectNotEqualToSelf(a);
  45 
  46 // We do have to do value-based rather than reference-based comparison for
  47 // java.lang.Double since that class is used to represent primitive numbers
  48 // in JavaScript.
  49 var b = new java.lang.Double(NaN);
  50 expectNotEqualToSelf(b);
  51 b = {};
  52 b = new java.lang.Double(NaN);
  53 expectNotEqualToSelf(b);
  54 
  55 // Although float is not used internally by Nashorn, java.lang.Float
  56 // is handled like a primitive number in most of Nashorn, so for consistency
  57 // we treat it like java.lang.Double.
  58 var c = new java.lang.Float(NaN);
  59 expectNotEqualToSelf(c);
  60 c = {};
  61 c = new java.lang.Float(NaN);
  62 expectNotEqualToSelf(c);