Not set creation time in integration tests

[oliverdettenborn]

I have create the class to use the eventuate lib on application with spring and postgressql:

@Service
@RequiredArgsConstructor
public class AbstractMessageProducer {
    private final MessageProducer messageProducer;

    protected void send(final String eventType, final Object payload) {
        final Message message = MessageBuilder
                .withPayload(JSonMapper.toJson(payload))
                .build();

        messageProducer.send(eventType, message);
    }
}

My table have the current DDL:

create table message
(
    id                varchar(767)                                                     not null,
    incremental_id    bigint   default nextval('message_incremental_id_seq'::regclass) not null,
    destination       varchar(1000)                                                    not null,
    headers           text                                                             not null,
    payload           text                                                             not null,
    published         smallint default 0,
    message_partition smallint,
    creation_time     bigint                                                           not null,
    primary key (id, creation_time)
)
    partition by RANGE (creation_time);

To validate if the AbstractMessageProducer works fine I have create this integration test:

@InfrastructureIntegrationTest
class AbstractMessageProducerIT {
    @Autowired
    private EntityManager entityManager;

    @Qualifier("abstractMessageProducer")
    @Autowired
    private AbstractMessageProducer abstractMessageProducer;

    @Test
    void shouldAddOnMessageTableTheEvent() {
        final var payload = UpsertPropertyDTO.builder()
                .eventType("UPDATE_PROPERTY")
                .payload(UpsertExternalHouseDTO.builder().build())
                .build();

        abstractMessageProducer.send(payload.getEventType(), payload.getPayload());

        final var result = entityManager
                .createNativeQuery("SELECT * FROM message", String.class)
                .getResultList();

        assertEquals(1, result.size());
    }
}

My integration test use test-container DB to run this test and apply the migration on db with flyway. But this test failed with error:

PreparedStatementCallback; SQL [insert into message(id, destination, headers, payload, creation_time, published, message_partition) values(?, ?, ?, ?, null, ?, ?)]; ERROR: no partition of relation "message" found for row
  Detalhe: Partition key of the failing row contains (creation_time) = (null).
org.springframework.dao.DataIntegrityViolationException: PreparedStatementCallback; SQL [insert into message(id, destination, headers, payload, creation_time, published, message_partition) values(?, ?, ?, ?, null, ?, ?)]; ERROR: no partition of relation "message" found for row

Where eventuate lib not set value for creation_time. Do you guys know what happens here?