@Override
	protected MessageBus getMessageBus() {
		if (messageBus == null) {
			messageBus = createKafkaTestMessageBus();
		}
		return messageBus;
	}
Integration tests for the {@link KafkaMessageBus}.

@author Eric Bottard
@author Marius Bogoevici
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/integration/bus/kafka/KafkaMessageBusTests.java