I am currently coaching several teams developing in COBOL for the Mainframe. This activity is part of a larger agile transformation of the bank these teams are part of.
I would like to introduce practices like unit testing, automated acceptance tests and Continuous Integration for their COBOL code.
In a first phase I would already be very happy when they actually write unit tests and trigger them manually on every change. As such they would adopt the practice of Continuous Integration as described by James Shore's article "Continuous Integration on a dollar a day" http://www.jamesshore.com/Blog/Continuous-Integration-on-a-Dollar-a-Day.html.
In a second phase I would like to have these unit tests triggered automatically on every change. And thus introducing the concept of a centralised build preferably with a dashboard giving test results and test execution trends.
For the unit testing I found COBOLUnit and IBM zUnit.
In parallel I see a way on how to achieve the automated acceptance tests. These would be executed off platform (outside the Mainframe). The team mostly delivers services via an ESB and some Mainframe UI screens. The services could be tested using languages like Ruby, Python, Java. And if we manage to screen scrape the Mainframe screens we could achieve the same using the same languages.
But we then would have a situation where unit tests are running on Mainframe and acceptance tests are running on a Linux or Windows. Risking to loose a unified dashboard with the state of all types of tests.
Jez Humble mentions the Suncorp Simplification Program case in Lean Enterprise and on continuousdelivery.com as an example that Continuous Delivery is possible on Mainframe. Suncorp invested a lot in a functional testing framework and automated acceptance tests for their Mainframe systems.
Unfortunately the case description stays very high level and doesn't provide details on how they achieved this.
So does anyone has experience with unit testing, automated acceptance tests and Continuous Integration for COBOL on Mainframe ?
Are we on the right track ? Are their better ways to achieve the same ?
I would be very interested to here your experiences.
Cheers,
Thierry
I would be very interested to here your experiences.
Cheers,
Thierry
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