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