1 /*
 2  * Copyright (c) 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
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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  * @test
26  * @summary Smoke test for captured values in local classes.
27  * @run testng TestLocalCapture
28  */
29 
30 import org.testng.annotations.*;
31 
32 import java.lang.invoke.MethodHandles;
33 import java.lang.reflect.Method;
34 import java.lang.reflect.code.interpreter.Interpreter;
35 import java.lang.reflect.code.op.CoreOp.FuncOp;
36 import java.lang.runtime.CodeReflection;
37 import java.util.stream.IntStream;
38 
39 import static org.testng.Assert.*;
40 
41 public class TestLocalCapture {
42 
43     int x = 13;
44     final int CONST = 1;
45 
46     @CodeReflection
47     public int sum(int y, int z) {
48         final int localConst = 2;
49         class Foo {
50             int sum(int z) { return localConst + x + y + z + CONST; };
51         }
52         return new Foo().sum(z);
53     }
54 
55     @Test(dataProvider = "ints")
56     public void testLocalCapture(int y) throws ReflectiveOperationException {
57         Method sum = TestLocalCapture.class.getDeclaredMethod("sum", int.class, int.class);
58         FuncOp model = sum.getCodeModel().get();
59         int found = (int)Interpreter.invoke(MethodHandles.lookup(), model, this, y, 17);
60         int expected = sum(y, 17);
61         assertEquals(found, expected);
62     }
63 
64     @DataProvider(name = "ints")
65     public Object[][] ints() {
66         return IntStream.range(0, 50)
67                 .mapToObj(i -> new Object[] { i })
68                 .toArray(Object[][]::new);
69     }
70 }