1 /*
   2  * Copyright (c) 2014, 2015, 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 /*
  25  * @test
  26  * @library /testlibrary
  27  * @summary Proof of concept test for RedefineClassHelper
  28  * @modules java.base/jdk.internal.misc
  29  * @modules java.compiler
  30  *          java.instrument
  31  *          jdk.jartool/sun.tools.jar
  32  * @build RedefineClassHelper
  33  * @run main RedefineClassHelper
  34  * @run main/othervm -javaagent:redefineagent.jar RedefineClassTest
  35  */
  36 
  37 import static jdk.test.lib.Asserts.*;
  38 import jdk.test.lib.*;
  39 
  40 /*
  41  * Proof of concept test for the test utility class RedefineClassHelper
  42  */
  43 public class RedefineClassTest {
  44 
  45     public static String newClass = "class RedefineClassTest$A { public int Method() { return 2; } }";
  46     public static void main(String[] args) throws Exception {
  47         A a = new A();
  48         assertTrue(a.Method() == 1);
  49         RedefineClassHelper.redefineClass(A.class, newClass);
  50         assertTrue(a.Method() == 2);
  51     }
  52 
  53     static class A {
  54         public int Method() {
  55             return 1;
  56         }
  57     }
  58 }