/*

 * Copyright (c) 2013, 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.

 */

/**

 * @test

 * @bug     8007052

 * @summary javap should include the descriptor for a method in verbose mode

 */

import java.io.File;

import java.io.FileWriter;

import java.io.IOException;

import java.io.PrintWriter;

import java.io.StringWriter;

import java.util.regex.Pattern;

public class DescriptorTest {

    public static void main(String... args) throws Exception {

        new DescriptorTest().run();

    }

    void run() throws Exception {

        File srcDir = new File("src");

        srcDir.mkdirs();

        File classesDir = new File("classes");

        classesDir.mkdirs();

        File f = writeFile(new File(srcDir, "E.java"), "enum E { A, B }");

        javac("-d", classesDir.getPath(), f.getPath());

        String out = javap("-p", "-v", new File(classesDir, "E.class").getPath());

        Pattern expect = Pattern.compile("\\Qprivate E();\\E\\s+\\Qdescriptor: (Ljava/lang/String;I)V\\E");

        checkContains(out, expect);

    }

    File writeFile(File f, String body) throws IOException {

        try (FileWriter out = new FileWriter(f)) {

            out.write(body);

        }

        return f;

    }

    void javac(String... args) throws Exception {

        StringWriter sw = new StringWriter();

        PrintWriter pw = new PrintWriter(sw);

        int rc = com.sun.tools.javac.Main.compile(args, pw);

        pw.flush();

        String out = sw.toString();

        if (!out.isEmpty())

            System.err.println(out);

        if (rc != 0)

            throw new Exception("compilation failed");

    }

    String javap(String... args) throws Exception {

        StringWriter sw = new StringWriter();

        PrintWriter pw = new PrintWriter(sw);

        int rc = com.sun.tools.javap.Main.run(args, pw);

        pw.flush();

        String out = sw.toString();

        if (!out.isEmpty())

            System.err.println(out);

        if (rc != 0)

            throw new Exception("javap failed");

        return out;

    }

    void checkContains(String s, Pattern p) throws Exception {

        if (!p.matcher(s).find())

            throw new Exception("expected pattern not found: " + p);

    }

}