1 /*
 2  * Copyright (c) 2019, 2024, 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 import java.lang.ref.WeakReference;
25 import java.lang.ref.ReferenceQueue;
26 
27 import jdk.internal.vm.annotation.ImplicitlyConstructible;
28 import org.testng.annotations.Test;
29 import static org.testng.Assert.*;
30 
31 /*
32  * @test
33  * @summary Test value classes with Reference types
34  * @enablePreview
35  * @run testng/othervm WeakReferenceTest
36  */
37 @Test
38 public class WeakReferenceTest {
39     @ImplicitlyConstructible
40     static value class Value {
41     }
42 
43     @Test(expectedExceptions = IdentityException.class)
44     static void test1() {
45         Value v = new Value();
46         WeakReference<Value> r = new WeakReference<>(v);
47     }
48 
49     @Test(expectedExceptions = IdentityException.class)
50     static void test2() {
51         ReferenceQueue<Object> q = new ReferenceQueue<>();
52         Value v = new Value();
53         WeakReference<Value> r = new WeakReference<>(v, q);
54     }
55 }