In my previous company I worked on a major enhancement to a legacy application where we inherited a smorgasbord of unit tests — approximately 7,000 tests in total. Whilst enhancing the application we spent an inordinate amount of time fixing broken tests. Of course requirements changed and so it was necessary to re-write tests to reflect this. But in this case rather than being facilitators, the tests became an impediment to innovation and change, and hence an impediment to quality. The unit tests were fragile.

So how could this have been avoided? In this article I’m going to be outlining…

Ross Whitehead

Enterprise Architect @ Nationwide

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