Package-time Class manipulation

package com.acme.ejb;

import javax.ejb.EJB;

import org.jboss.arquillian.api.Deployment;
import org.jboss.arquillian.junit.Arquillian;
import org.jboss.shrinkwrap.api.Archives;
import org.jboss.shrinkwrap.api.Filters;
import org.jboss.shrinkwrap.api.spec.JavaArchive;
import org.jboss.shrinkwrap.manipulation.api.Manipulators;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;


@RunWith(Arquillian.class)
public class EJBExceptionTestCase
{
   @Deployment
   public static JavaArchive createDeployment()
   {
      return Archives.create("test.jar", JavaArchive.class)
               // Listen to added Assets to wrap them in a Javassist manipulator
               .addListener(
                     Filters.include(GreetingManagerBean.class),
                     Manipulators.makeMethod("greet")
                                 .throwException(IllegalArgumentException.class))
               .addClasses(
                     GreetingManager.class,
                     GreetingManagerBean.class);
   }

   @EJB
   private GreetingManager greetingManager;

   @Test
   public void shouldBeAbleToInjectEJB() throws Exception
   {
      String userName = "Devoxx";
      try
      {
         greetingManager.greet(userName);
         Assert.fail("Should have throw Exception");
      }
      catch (Exception e)
      {
         e.printStackTrace();
      }
   }
}



package com.acme.ejb;

import javax.ejb.Local;
import javax.ejb.Stateless;

@Local(GreetingManager.class)
@Stateless
public class GreetingManagerBean implements GreetingManager
{
   @Override
   public String greet(String userName)
   {
      return "Hello " + userName;
   }
}