Using JUnit with GlassFish EJB embedded EJB container

1- Add the Glassfish embedded EJB container dependency to your Maven POM file. Also the JUnit dependency.

<dependency>
 <groupId>org.glassfish.main.extras</groupId>
 <artifactId>glassfish-embedded-all</artifactId>
 <version>3.1.2</version>
 <scope>test</scope>
</dependency>

<dependency>
 <groupId>junit</groupId>
 <artifactId>junit</artifactId>
 <version>4.11</version>
</dependency>

The scope is test so it can be applied during the testing of the application.

2- The service class is annotated with @Stateless as bellow

package com.ithinkisink.blog.service;
@Stateless
public class MyService {
   public String getMessage() {
      return "Hello!";
   }
}

For the sake of simplicity, the service class doesn't implement an interface as EJB supports injecting classes with no need to have interfaces.

3- Now the unit test class could be as bellow:

import javax.ejb.embeddable.EJBContainer;
import javax.ejb.embeddable.EJBContainer;
import javax.naming.Context;
import javax.naming.NamingException;

import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

import com.ithinkisink.blog.service.MyService;

/**
 *
 *@author Belal
 */
public class MyServiceTest {

   private static Context  ctx;
   private static EJBContainer ejbContainer;
   private MyService myService;

   @BeforeClass
   public static void setUpBeforeClass() {
      ejbContainer = EJBContainer.createEJBContainer();
      System.out.println("Container Opening" );
      ctx = ejbContainer.getContext();
   }

   @AfterClass
   public static void tearDownAfterClass() {
      ejbContainer.close();
      System.out.println("Container Closing" );
   }

   @Test
   public void getMessageTest() throws NamingException {
      //note the JNDI path of the EJB container in case you used another container, this would need to be changed!
      myService = (MyService) ctx.lookup("java:global/ejb-app/classesejb/MyService");
      Assert.assertEquals(myService.getMessage(), "Hello!");
   }
}