One of the big benefits of decoupling your code from whichever message broker infrastructure, you're running on, is that it becomes much easier to exercise your code in automated tests.

Here's a few words about that – e.g. check out

• How to unit test a message handler
• How to unit test a saga handler
• How to test code that uses the bus to do things
• How to create integration tests
• How to test incoming and outgoing steps