This was a question that we were recently asked, specifically if it could be driven by Cucumber. Some initial research showed that it was possible but then we stopped and thought 'hang on a second – why?'
Indeed, why? Cucumber is primarily a developer tool and is not promoted as a testing tool, whereas Rational Integration Tester is. Rational Integration Tester also requires no coding, unlike Cucumber, and projects can be uploaded and used in HP Quality Center so a suite of tests can be run.
We felt that because Rational Integration Tester is a licensed, testing tool, it will be dedicated to testing, whereas an open-source tool such as Cucumber may be amended in such a way that it cannot be used for testing. It is a straight forward process to create and execute a test in Rational Integration Tester; Cucumber requires a developer who can write code (in the Gherkin language) in order to execute the test.
If you spend the extra for a Rational Integration Tester license, you'll receive a dedicated testing tool with access to a support team who can help with any issues you may encounter, such as the WS Security issue we previously experienced.