DataJpaTest using H2 not able to access data in Subselect Entity - spring-boot

Question

I am running a unit test set up as a DataJpaTest with an H2 database. It worked well, until I introduced a new Immutable Entity set using a Subselect. It does not break, but it does not find data that it should. I see in the SQL that it is correctly joining to the Subselect query.
When running as normal as an application, the #Subselect entity works fine, so it is an issue with the unit test setup somehow.
Here is my Main entity:
#Entity
#DynamicUpdate
#Getter
#Setter
#EqualsAndHashCode(onlyExplicitlyIncluded = true, callSuper = false)
#Table(name = "apps", schema = "public")
public class App extends BaseEntity
{
#Id
#Column(name = "app_id", nullable = false)
#GeneratedValue(strategy = GenerationType.SEQUENCE, generator = "ent_generator")
#SequenceGenerator(name = "ent_generator", sequenceName = "entity_seq", allocationSize = 1)
private long appId;
#EqualsAndHashCode.Include
#Basic
#Column(name = "app_name", length = 200)
private String appCode;
#EqualsAndHashCode.Include
#Basic
#Column(name = "app_ver_name", length = 200)
private String appVersion;
#ManyToOne(fetch = FetchType.EAGER)
#JoinColumn(name = "parent_app_id")
private App parent;
// ...
#OneToMany(
mappedBy = "app",
cascade = CascadeType.ALL,
orphanRemoval = true
)
private Set<TrainingRequirement> trainingRequirements = new HashSet<>();
#OneToMany(mappedBy = "app")
private Set<EffectiveTrainingRequirement> effectiveTrainingRequirements = new HashSet<>();
// ...
}
Here is my #Subselect entity:
#Entity
#Immutable
#Subselect(
"SELECT\n" +
" tr.trn_req_id AS trn_req_id\n" +
" , tr.app_id AS app_id\n" +
" FROM apps a\n" +
" JOIN training_reqs tr\n" +
"-- ...")
#Synchronize({"apps","training_reqs"})
public class EffectiveTrainingRequirement
{
#Id
#Column(name = "trn_req_id", nullable = false)
private long trainingRequirementId;
#EqualsAndHashCode.Include
#ManyToOne(fetch = FetchType.LAZY)
#JoinColumn(name = "app_id")
private App app;
}
Here is the Unit test code (vastly reduced for relevant parts):
#RunWith(SpringRunner.class)
#DataJpaTest
public class TrainingRequirementRepositoryTest
{
#Autowired
private TestEntityManager entityManager;
#Autowired
private AppRepository appRepository;
#Before
public void setup()
{
// ...
app4 = new App(organization, "a4");
app4.addTrainingRequirement(new TrainingRequirement("treq6", c6));
app4.addTrainingRequirement(new TrainingRequirement("treq7", c7, tr1));
app4.addTrainingRequirement(new TrainingRequirement("treq8", c8, tr2));
entityManager.persist(app4);
app4v2 = new App(organization, "a4", app4, "v2");
app4v2.setParent(app4);
app4v2.addTrainingRequirement(treq7chg = new TrainingRequirement("treq7", c7, tr2));
treq7chg.setChangeType(InheritOverride.CHANGE);
app4v2.addTrainingRequirement(treq6rmv = new TrainingRequirement("treq6"));
treq6rmv.setChangeType(InheritOverride.REMOVE);
app4v2.addTrainingRequirement(treq9add = new TrainingRequirement("treq9", c9, tr4));
treq9add.setChangeType(InheritOverride.ADDITION);
entityManager.persist(app4v2);
}
#Test
public void test_AppWithEffectiveTR()
{
App app = appRepository.getAppWithParent(organization, "a4", "v2").get();
logger.debug("# tr: "+app.getTrainingRequirements().size());
logger.debug("# etr: "+app.getEffectiveTrainingRequirements().size());
for (EffectiveTrainingRequirement tr : app.getEffectiveTrainingRequirements())
logger.debug("tr: "+tr.toString());
}
}
The repository:
#Repository
public interface AppRepository extends CrudRepository<App, Long>
{
String APP_FETCH_QUERY = "SELECT a FROM App a " +
"LEFT JOIN FETCH a.parent p " +
"LEFT JOIN FETCH a.trainingRequirements atr " +
"LEFT JOIN FETCH a.effectiveTrainingRequirements ";
#Query(value = APP_FETCH_QUERY +
"WHERE a.organization = :org " +
" AND a.appCode = :appCode " +
" AND a.appVersion = :appVersion" )
Optional<App> getAppWithParent(#Param("org") Organization org,
#Param("appCode") String appCode,
#Param("appVersion") String appVersion);
}