1 /*
 2  * Copyright (c) 2025, 2026, 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 jdk.incubator.code.Op;
25 import jdk.incubator.code.Reflect;
26 import org.junit.jupiter.api.Assertions;
27 import org.junit.jupiter.api.Test;
28 
29 import java.io.IOException;
30 import java.nio.file.Files;
31 import java.nio.file.Path;
32 import java.util.function.IntBinaryOperator;
33 
34 /*
35  * @test
36  * @summary Test that java version check we do in op building methods is working
37  * @modules jdk.incubator.code
38  * @run main TestJavaVersionCheckerForLambdas
39  * @run junit/othervm TestJavaVersionCheckerForLambdas
40  */
41 public class TestJavaVersionCheckerForLambdas {
42 
43     public static void main(String[] args) throws IOException { // transform $CM classfile
44         String testClassName = TestJavaVersionCheckerForLambdas.class.getName();
45         Path testClassesDir = Path.of(System.getProperty("test.classes"));
46         Path innerClassPath = testClassesDir.resolve(testClassName + "$$CM.class");
47         byte[] newInnerBytes = TestJavaVersionCheckerForMethods.changeCompileTimeVersion(innerClassPath, Runtime.version().feature() - 1);
48         Files.write(innerClassPath, newInnerBytes);
49     }
50 
51     @Test
52     void test() throws ReflectiveOperationException, IOException {
53         IntBinaryOperator l = (@Reflect IntBinaryOperator) (a, b) -> Math.max(a, b);
54         Assertions.assertThrows(UnsupportedOperationException.class, () -> Op.ofLambda(l));
55     }
56 }