### Question:
OvsdbOperationalCommandAggregator implements TransactionCommand { @Override public void execute(ReadWriteTransaction transaction) { for (TransactionCommand command: commands) { try { command.execute(transaction); } catch (NullPointerException | NoSuchElementException | ClassCastException e) { LOG.warn("Exception trying to execute {}", command, e); } } } OvsdbOperationalCommandAggregator(InstanceIdentifierCodec instanceIdentifierCodec,
            OvsdbConnectionInstance key, TableUpdates updates, DatabaseSchema dbSchema, boolean initialUpdate); @Override void execute(ReadWriteTransaction transaction); @Override void onSuccess(); @Override void onFailure(Throwable throwable);  }### Answer:
@Test public void testExecute() { ReadWriteTransaction transaction = mock(ReadWriteTransaction.class); for (TransactionCommand command: commands) { doNothing().when(command).execute(any(ReadWriteTransaction.class)); } ovsdbOperationalCommandAggregator.execute(transaction); for (TransactionCommand command: commands) { verify(command).execute(any(ReadWriteTransaction.class)); } }