How to Write the test case for DAO class with JUNIT5 and mockito in spring boot for the code

Question

How to Write the test case for DAO class with JUnit5 and Mockito in spring boot for the code

I am trying to write a test case with JUnit5 and Mockito. How to write the test cases for the below method

DAO class:

public Map<String, Object> addParticipantSubRole(ProductLineParticipantSubRoleDTO subRole, int userId, int buId,int plId) throws RTDataBaseException {
        Map<String, Object> returnMap = new HashMap<>();

        try {

            StoredProcedureQuery query = this.getSession()
                    .createStoredProcedureCall("PKG_QA_PRODUCT_LINE_ADMIN.PROC_ADD_PARTICIP_SUB_ROLES")
                    .registerStoredProcedureParameter(1, Integer.class, ParameterMode.IN).setParameter(1, userId)
                    .registerStoredProcedureParameter(2, Integer.class, ParameterMode.IN).setParameter(2, plId)
                    .registerStoredProcedureParameter(3, String.class, ParameterMode.IN)
                    .setParameter(3, subRole.getParticipantSubRoleName())
                    .registerStoredProcedureParameter(4, String.class, ParameterMode.IN)
                    .setParameter(4, subRole.getParticipantSubRoleDesc())
                    .registerStoredProcedureParameter(5, Integer.class, ParameterMode.OUT)
                    .registerStoredProcedureParameter(6, Integer.class, ParameterMode.OUT)
                    .registerStoredProcedureParameter(7, String.class, ParameterMode.OUT)
                    .registerStoredProcedureParameter(8, String.class, ParameterMode.OUT);

            int plParticipantSubRoleId = (Integer) query.getOutputParameterValue(5);
            int returnId = (Integer) query.getOutputParameterValue(6);
            String message = (String) query.getOutputParameterValue(7);

            if (returnId == Constants.SUCCESS_INTEGER_VALUE) {
                returnMap.put(RESULT, plParticipantSubRoleId);
                returnMap.put(RETURN_ID, returnId);
                returnMap.put(RETURN_MESSAGE, message);
            } else {
                returnMap.put(RESULT, subRole);
                returnMap.put(RETURN_ID, returnId);
                returnMap.put(RETURN_MESSAGE, message);
            }

        } catch (Exception exception) {
            log.error(exception.toString());
            throw new RTDataBaseException(userId, "Failed to add PL Sub Role in DB", userId, exception);
        }
        return returnMap;
    }

Answer 1

It makes close to zero sense to do unit testing on the persistance layer. You get a lot of code with close to zero benefit.

Its better to go for an integration test which can look like this ...

@DataJpaTest
class MyDaoTest {

  @Autowired private MyDao myDao;

  @Test
  void testMyDao(){
     // Do test setup
     myDay.addParticipantSubRole(/* input parameters */)
    // Do asserts

  }
}