Mocking spring + hibernate using mockmvc and mockito

Question

I am using spring + hibernate in my project and below is my java code

 @Repository
    @Transactional
    public class DomainDaoImpl implements DomainDao {

     static Logger logger = LoggerFactory.getLogger(DomainDaoImpl.class);

     @Autowired
     private SessionFactory hibernateSessionFactory;

     private static final String queryForDomains = "from Domain";
    @Override
    public List<Domain> getListOfALMDomains() throws CustomException {
    logger.info("Getting List of ALM domains");
    List<Domain> domains = null;
    try {
      Session session = null;
      domains = this.hibernateSessionFactory.getCurrentSession().createQuery(queryForDomains).list();
      logger.info("Exiting getListOfALMDomains method");
    } catch (Exception e) {
      logger.error("Exception occurred : " + e);
      throw new CustomException("Please contact your administrator. Unable to retrieve the domains.");
    }

    return domains;
      }
     }

Below is my unit test and I am try to mock hibernateSessionFactory.

@Test
@Transactional
public void getListOfDomainFromDomainImpl() throws Exception{
 String queryForDomains = "from Domain";
 Domain domainOne = new Domain();
 domainOne.setDomainId(4);
 domainOne.setDomainName("ADP");
 Domain domainSecond = new Domain();
 domainSecond.setDomainId(11);
 domainSecond.setDomainName("ABP");
 List<Domain> domains = new ArrayList<Domain>();
 domains.add(domainOne);
 domains.add(domainSecond);
 DomainDaoImpl domainDaoImpl = new DomainDaoImpl();
 domainDaoImpl = mock(DomainDaoImpl.class);
 when(domainDaoImpl.getListOfALMDomains()).thenReturn(domains);
 this.hibernateSessionFactory = mock(SessionFactory.class);
 when(hibernateSessionFactory.getCurrentSession().
 createQuery(queryForDomains) .list()).thenReturn(domains);
}
}

I am getting NullPointerException at line

 when(hibernateSessionFactory.getCurrentSession().
 createQuery(queryForDomains).list()).thenReturn(domains);

I am not getting a way to mock hibernateSessionFactory. Can someone please help on this issue?

score 2 · Answer 1 · answered Jun 22 '16 at 13:34

You will have to mock all the way to the list() method:

Session session = mock(Session.class); Query query = mock(Query.class); when(hibernateSessionFactory.getCurrentSession()).thenReturn(session); when(session.createQuery(anyString())).thenReturn(query); when(query.list()).thenReturn(domains);

Don't mock DomainDaoImpl since this is the class you are testing.

domainDaoImpl.setSessionFactory(hibernateSessionFactory);

You don't have this method so you will have to add it, and use @Autowired on this method instead of on the field:

@Autowired
public void setSessionFactory(SessionFactory sf) {this.hibernateSessionFactory = sf;}

Set your mock session factory to DomainDaoImpl in your test:

domainDaoImpl.setSessionFactory(hibernateSessionFactory);

score 0 · Answer 2 · answered Jun 22 '16 at 13:36

Use these lines of code

  Session  session = mock(Session.class);
  SessionFactory  sessionFactory = mock(SessionFactory.class);
   Query query = mock(Query.class);
when(sessionFactory.getCurrentSession()).thenReturn(session);    
when(session.createQuery(queryForDomains)).thenReturn(query );
when(query.list()).thenReturn(domains);

Mocking spring + hibernate using mockmvc and mockito

2 Answers2