private PersistenceManager manager = resource.getPersistenceManager();
@Test
public void should_persist_and_find() throws Exception {
Long id = RandomUtils.nextLong(0,Long.MAX_VALUE);
ValuelessEntity entity = new ValuelessEntity(id);
manager.insert(entity);
ValuelessEntity found = manager.find(ValuelessEntity.class, id);
assertThat(found).isNotNull();
}