@Test
public void handleSellTransactionStartedEvent() {

    testSubject.on(new SellTransactionStartedEvent(transactionIdentifier,
                                                   orderBookIdentifier,
                                                   portfolioIdentifier,
                                                   DEFAULT_TOTAL_ITEMS,
                                                   DEFAULT_ITEM_PRICE));
    verify(transactionViewRepository).save(argThat(new TransactionEntryMatcher(
            DEFAULT_TOTAL_ITEMS, 0, DEFAULT_COMPANY_NAME, DEFAULT_ITEM_PRICE, STARTED, SELL
    )));
}