@Test
  public void testIntMethod() {
    BoxedClass target = new BoxedClass();
    HandlerCallingTarget<BoxedClass> handler =
        new HandlerCallingTarget<BoxedClass>(target, new Object[] {321});
    BoxedClass proxy = ProxyFactory.createProxy(BoxedClass.class, handler);

    assertEquals(321, proxy.testInt(123).intValue());
    assertEquals("testInt", handler.m.getName());
  }