String original = "hello world";
    String copy = SerializableTester.reserializeAndAssert(original);
    assertEquals(original, copy);
    assertNotSame(original, copy);
  }

  public void testClassWhichDoesNotImplementEquals() {
    ClassWhichDoesNotImplementEquals orig = new ClassWhichDoesNotImplementEquals();
    boolean errorNotThrown = false;
    try {
      SerializableTester.reserializeAndAssert(orig);