testing batch insert ignore

[PavloMyrotiuk]

I have an issue with running the repository test. It hangs and never finishes, though if running in development mode everything works as expected.

CREATE TABLE IF NOT EXISTS fruits
        (
        fruit_id                BIGSERIAL             primary key,
        colour                  CHARACTER VARYING(39) NOT NULL UNIQUE
        );

@Data
@Entity
@Builder
@Table("fruits")
class Fruit {
    Long fruitId;
    String colour;
}

Reactive repository:

@ApplicationScoped
class Repository implements PanacheRepository<Fruit> {
    @Inject
    PgPool client;

    @ReactiveTransactional
    public Uni<Void> insertIgnoreFruits(List<Fruit> fruits) {
        List<Tuple> values = fruits.stream()
                .map(item -> Tuple.from(Arrays.asList(item.getColour())))
                .collect(Collectors.toList());
        return client.preparedQuery("""
                        INSERT INTO fruits(colour)
                        VALUES ($1)
                        ON CONFLICT DO NOTHING
                        """)
                .executeBatch(values).onItem().ignore().andContinueWithNull();
    }
}

Issue is with last two lines of code:
.execute(() -> testedInstance.insertIgnoreFruits(fruits)) // that hangs forever
.assertEquals(() -> session.createQuery("select count(*) from Fruit f").getSingleResult(), 3L); //this line never executed

@TestReactiveTransaction
@QuarkusTest
@QuarkusTestResource(DatabaseDockerInitializer.class) // nothing special/ testcontainers/ starting postgres in docker for running tests
class FruitRepositoryTest {
    @Inject
    Mutiny.Session session;
    @Inject
    Repository testedInstance;

    @Test
    public void shouldNotFailOnDuplicate(UniAsserter asserter) {
        List<Fruit> fruits = Arrays.asList(
                Fruit.builder().colour("black").build(),
                Fruit.builder().colour("red").build(),
                Fruit.builder().colour("white").build()
        );

        asserter.execute(() -> session.persist(Fruit.builder().colour("black").build())
                        .chain(() -> session.persist(Fruit.builder().colour("red").build())))
                .assertEquals(() -> session.createQuery("select count(*) from Fruit f").getSingleResult(), 2L)
                .execute(() -> testedInstance.insertIgnoreFruits(fruits)) // that hangs forever
                .assertEquals(() -> session.createQuery("select count(*) from Fruit f").getSingleResult(), 3L); //this line never executed
    }
}