private void validate(UserNodeCertificate cert, UserNodeCertificate entity) {
   assertNotNull("UserNodeCertificate should exist", entity);
   assertNotNull("Created date should be set", entity.getCreated());
   assertEquals(cert.getId(), entity.getId());
   assertArrayEquals(cert.getKeystoreData(), entity.getKeystoreData());
   assertEquals(cert.getStatus(), entity.getStatus());
   assertEquals(cert.getNode(), entity.getNode());
   assertEquals(cert.getUser(), entity.getUser());
 }