/*

 * Copyright (c) 2015, Oracle and/or its affiliates. All rights reserved.

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

 * 

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

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

 * published by the Free Software Foundation.

 * 

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

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

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

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

 * accompanied this code).

 * 

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

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

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

 * 

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

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

 * questions.

 */

/**

 * JDK-8141407: Wrong evaluation of a != a when a = NaN

 *

 * @test

 * @run

 */

function expectNotEqualToSelf(a) {

    Assert.assertFalse(a == a);

    Assert.assertFalse(a === a);

    Assert.assertTrue(a != a);

    Assert.assertTrue(a !== a);

}

// In previous versions of Nashorn this failed only on the second assignment,

// because only then the property slot was widened to object.

var a = NaN;

expectNotEqualToSelf(a);

a = {};

a = NaN;

expectNotEqualToSelf(a);

// We do have to do value-based rather than reference-based comparison for

// java.lang.Double since that class is used to represent primitive numbers

// in JavaScript.

var b = new java.lang.Double(NaN);

expectNotEqualToSelf(b);

b = {};

b = new java.lang.Double(NaN);

expectNotEqualToSelf(b);

// Although float is not used internally by Nashorn, java.lang.Float

// is handled like a primitive number in most of Nashorn, so for consistency

// we treat it like java.lang.Double.

var c = new java.lang.Float(NaN);

expectNotEqualToSelf(c);

c = {};

c = new java.lang.Float(NaN);

expectNotEqualToSelf(c);