JDK-8141407.js revision 1549:aac8413d3bb7 
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.
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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
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22 */
23
24/**
25 * JDK-8141407: Wrong evaluation of a != a when a = NaN
26 *
27 * @test
28 * @run
29 */
30
31function 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.
40var a = NaN;
41expectNotEqualToSelf(a);
42a = {};
43a = NaN;
44expectNotEqualToSelf(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.
49var b = new java.lang.Double(NaN);
50expectNotEqualToSelf(b);
51b = {};
52b = new java.lang.Double(NaN);
53expectNotEqualToSelf(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.
58var c = new java.lang.Float(NaN);
59expectNotEqualToSelf(c);
60c = {};
61c = new java.lang.Float(NaN);
62expectNotEqualToSelf(c);
63