@Test
public void categoriesUpdated() {

	Transactions transactions = service.retrieve();
	eventSupport.updated(new Categories());
	Transactions transactions2 = new Transactions(
			ImmutableList.of(MockTransaction.create("2015-01-01", "a desc", 123)));
	doReturn(transactions2).when(persistenceService).load();
	Transactions transactions3 = service.retrieve();
	assertNotSame(transactions, transactions3);
	verify(persistenceService, times(2)).load();
}