How to test a jpa readonly query? - spring-data-jpa

Question

The model is simplified for the question.
I have this entity:
#Entity
public class Formation {
#Id
Long id;
String login;
String code;
String level;
// geters and Setters
With this repository:
public interface FormationRepository extends JpaRepository<Formation, Long> {
#Query(value = "SELECT UNIQUE l.id, l.login, d.code,d.level\n"
" FROM table_login l,\n" +
" table_diploma d,\n" +
" WHERE
" l.fhab_key = d.fhab_key\n" +
" AND l.login= :login", nativeQuery = true)
List<Formation> findAllByLogin(#Param("login")String login);
So far so good, this works.
Now I want to add test for the repository (with and h2database). But I can't save data, as the entity isn't mapped to a single table.
So this won't work:
#RunWith(SpringRunner.class)
#SpringBootTest(classes = Application.class)
#DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
public class FormationRepositoryTest {
#Autowired
FormationRepository formationRepository;
#Test
public void communeRepositoryTest() {
Formation formation = new Formation();
formation.setId(123L);
formation.setDlog_login("123");
formationRepository.save(formation); // ok
formationRepository.findAllByLogin("123"); // ko -> Caused by: Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: scolarite.scol_droit_login is not mapped
}
}
Here I need to add, that I don't want sql files in my app.
So what would be a solution here ?
Change my model to create an entity by table ? (in real, my request use 8 inner joins, so it will be quite long to code all that...)
Another solution ?

Answer 1

If you do not want to create the entities for all your tables, you could pre-populate your testing H2 database by defining schema.sql and data.sql on your classpath.
schema.sql will contain the DDL statements to create all tables involved (you mention 8 tables).
data.sql will contain the insert statements needed to make your custom sql return login = 123.
You can find an example here.
Then your test code would be like:
#RunWith(SpringRunner.class)
#SpringBootTest(classes = Application.class)
#DirtiesContext(classMode = DirtiesContext.ClassMode.AFTER_EACH_TEST_METHOD)
public class FormationRepositoryTest {
#Autowired
FormationRepository formationRepository;
#Test
public void communeRepositoryTest() {
List<Formation> formations = formationRepository.findAllByLogin("123");
Assert.assertEquals(formations.size(), 1);
}
}