long totalPayloadSize = PAYLOAD_SIZE_PER_MESSAGE * numberOfMessages;
_command.setNumberOfMessages(numberOfMessages);
_command.setBatchSize(batchSize);
ParticipantResult result = _producer.doIt(CLIENT_NAME);
assertExpectedProducerResults(result, PARTICIPANT_NAME1, CLIENT_NAME, _testStartTime,
Session.AUTO_ACKNOWLEDGE, batchSize, numberOfMessages, PAYLOAD_SIZE_PER_MESSAGE, totalPayloadSize, null);
verify(_delegate, times(numberOfMessages)).sendNextMessage(isA(CreateProducerCommand.class));
verify(_delegate, times(numberOfMessages)).calculatePayloadSizeFrom(_mockMessage);