@Test
void recommendWrongAmount() {

    final Reservation mockedReservation = ReservationDescriptorTest.mockReservation();
    final ReservationDescriptor ld = new ReservationDescriptor(mockedReservation, () -> null);
    final Optional<RecommendedReservation> r = ld.recommend(Money.from(1));
    assertThat(r).isEmpty();
}