jdk

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/*
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 * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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/*
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 * @test
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 * @bug 8328747
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 * @summary WrongMethodTypeException with pattern matching on switch on sealed classes
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 * @library /tools/lib
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 * @modules jdk.compiler/com.sun.tools.javac.api
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 *          jdk.compiler/com.sun.tools.javac.main
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 *          jdk.jdeps/com.sun.tools.javap
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 * @build toolbox.ToolBox toolbox.JavapTask
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 * @compile T8328747.java
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 * @run main T8328747
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 */
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import toolbox.*;
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import java.nio.file.Files;
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import java.nio.file.Path;
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import java.nio.file.Paths;
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public class T8328747 extends TestRunner  {
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    private ToolBox tb;
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    public static void main(String... args) throws Exception {
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        new T8328747().runTests();
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    }
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    T8328747() {
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        super(System.err);
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        tb = new ToolBox();
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    }
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    public void runTests() throws Exception {
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        runTests(m -> new Object[] { Paths.get(m.getName()) });
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    }
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    @Test
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    public void test(Path base) throws Exception {
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        Path current = base.resolve(".");
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        Path src = current.resolve("src");
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        Path classes = current.resolve("classes");
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        tb.writeJavaFiles(src,
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                """
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                package test;
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                public class Test {
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                   public static void main(String[] args) {
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                     f(new P());
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                     f(new O());
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                   }
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                   private static void f(I info) {
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                     switch (info) {
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                       case P p -> System.err.println(p);
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                       case O o -> System.err.println(o);
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                     }
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                   }
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                   static sealed interface I permits P, O {}
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                   private abstract static class A {}
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                   static final class P extends A implements I {}
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                   static final class O extends A implements I {}
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                }
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                """);
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        Files.createDirectories(classes);
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        {//with --release:
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            new JavacTask(tb)
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                    .options("--release", "21")
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                    .outdir(classes)
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                    .files(tb.findJavaFiles(src))
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                    .run(Task.Expect.SUCCESS)
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                    .writeAll();
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            String javapOut = new JavapTask(tb)
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                    .options("-v")
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                    .classpath(classes.toString())
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                    .classes("test.Test")
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                    .run()
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                    .getOutput(Task.OutputKind.DIRECT);
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            if (!javapOut.contains("#25 = InvokeDynamic      #0:#26         // #0:typeSwitch:(Ljava/lang/Object;I)I"))
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                throw new AssertionError("typeSwitch for a version less than 23 should accept a static type of java.lang.Object");
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        }
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        {//without:
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            new JavacTask(tb)
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                    .outdir(classes)
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                    .files(tb.findJavaFiles(src))
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                    .run(Task.Expect.SUCCESS)
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                    .writeAll();
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            String javapOut = new JavapTask(tb)
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                    .options("-v")
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                    .classpath(classes.toString())
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                    .classes("test.Test")
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                    .run()
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                    .getOutput(Task.OutputKind.DIRECT);
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            if (!javapOut.contains("#25 = InvokeDynamic      #0:#26         // #0:typeSwitch:(Ltest/Test$I;I)I"))
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                throw new AssertionError("typeSwitch from version 23 and beyond should accept a precise selector type");
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        }
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    }
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}
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