Brent Sordyl's blog

One interesting use of Cucumber is to facilitate integration and communication between different systems. At my last job we had several distributed systems that communicated via a messaging broker. It was very important that the messages sent between the different systems be kept in sync and handled appropriately. For example, System A needed to know the exact message format and queue that System B was going to be using, and vice versa. This type of integration between systems is very error prone and when something goes awry the problems can be very hard to track down. In order to ensure both systems were on the same page we used the exact same Cucumber feature in both systems but had the step definitions verify different things on the respective systems. In this post I’ll walk through a quick example illustrating the tools and techniques we used to do this.
(Link: Using Cucumber to Integrate Distributed Systems and Test Messaging)