text: /*
   * Copyright (c) 2011, 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.
   *
   */
  package com.github.dcevm.test.methods;
  
  import org.junit.Before;
  import org.junit.Test;
  
  import static com.github.dcevm.test.util.HotSwapTestHelper.__toVersion__;
  import static org.junit.Assert.assertEquals;
  import static org.junit.Assert.assertTrue;
  
  /**
   * Redefines a class and tests that the lock on the java.lang.Class object
   * is retained. Also tests that the object identity of the java.lang.Class
   * object is not changed.
   *
   * @author Thomas Wuerthinger
   */
  public class ClassObjectSynchronizationTest {
  
    @Before
    public void setUp() throws Exception {
      __toVersion__(0);
    }
  
    // Version 0
    public static class A {
  
      public int value() {
        return 1;
      }
    }
  
    // Version 1
    public static class A___1 {
  
      public int value() {
        return 2;
      }
    }
  
    @Test
    public void testClassObjectSynchronization() {
      A a = new A();
      Class clazz = a.getClass();
      synchronized (clazz) {
        assertEquals(1, a.value());
        __toVersion__(1);
        assertEquals(2, a.value());
        assertTrue(a.getClass() == clazz);
        assertTrue(a.getClass() == ClassObjectSynchronizationTest.A.class);
      }
      assertEquals(2, a.value());
      assertTrue(a.getClass() == clazz);
      __toVersion__(0);
      assertTrue(a.getClass() == clazz);
    }
  }
  