@Test
public void testHandleEventConfirmItemReservation() {

    testSubject.on(new ItemReservationConfirmedForPortfolioEvent(portfolioId, itemId, transactionId, 50));
    verify(portfolioViewRepository).save(argThat(new PortfolioEntryMatcher(
            itemId.getIdentifier(), 1, DEFAULT_AMOUNT_ITEMS - 50, 1, DEFAULT_AMOUNT_ITEMS - 50
    )));
}