jdk8-mips64-public/langtools: test/tools/javap/DescriptorTest.java@0b6cc4ea670f

     1 /*

     2  * Copyright (c) 2013, 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  */

    24 /**

    25  * @test

    26  * @bug     8007052

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

    28  */

    30 import java.io.File;

    31 import java.io.FileWriter;

    32 import java.io.IOException;

    33 import java.io.PrintWriter;

    34 import java.io.StringWriter;

    35 import java.util.regex.Pattern;

    37 public class DescriptorTest {

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

    39         new DescriptorTest().run();

    40     }

    42     void run() throws Exception {

    43         File srcDir = new File("src");

    44         srcDir.mkdirs();

    45         File classesDir = new File("classes");

    46         classesDir.mkdirs();

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

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

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

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

    52         checkContains(out, expect);

    53     }

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

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

    57             out.write(body);

    58         }

    59         return f;

    60     }

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

    63         StringWriter sw = new StringWriter();

    64         PrintWriter pw = new PrintWriter(sw);

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

    66         pw.flush();

    67         String out = sw.toString();

    68         if (!out.isEmpty())

    69             System.err.println(out);

    70         if (rc != 0)

    71             throw new Exception("compilation failed");

    72     }

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

    75         StringWriter sw = new StringWriter();

    76         PrintWriter pw = new PrintWriter(sw);

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

    78         pw.flush();

    79         String out = sw.toString();

    80         if (!out.isEmpty())

    81             System.err.println(out);

    82         if (rc != 0)

    83             throw new Exception("javap failed");

    84         return out;

    85     }

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

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

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

    90     }

    91 }

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