In a similar fashion than the RabbitMQ HealthCheck, having it for Azure Service Bus, at these levels of testing:
Azure SB topic (usually, each topic in your Azure SB account will be owned by a different business application)
Testing an Azure SB Subscriptions list which are dependencies for a particular service/application
Testing a message Publish() into the Service Bus with a "Test" Event/Message Type, so it is ignored by other subscriptors
In any case, the scope should be defined in further details.
In a similar fashion than the RabbitMQ HealthCheck, having it for Azure Service Bus, at these levels of testing: