TALC Driven Development

Recently I’ve been reading several blog posts about the effectiveness of Test Driven Development. Of particular interest is Jacob Proffit‘s TDD or POUT

It seems to me that there is Plain Old Unit Testing, which I would argue implies “test at the end” unit testing at one of the spectrum, and then pure TDD at the other end. I see myself being near the TDD side, but not all the way; in fact I would categorise my approach as “Test After Little Code” Driven Development, or Pragmatic Unit Testing. What I tend to do is write a little bit of code first then write a test that exercises the code. From that point I’ll do one of two things, either write another little bit code and then test it, or sometimes write another test which deals with a slightly different case and then write the code to make it pass. Often different situations seem to lend themselves to a different approach.

I’m not sure exactly how Jacob does POUTing, but I’d imagine he doesn’t leave all the unit testing to the end. I think this is the real ‘enemy’ of unit testing, as by the end you are facing all the issues that TDD addresses such as code that isn’t testable, or no time left to test. These issues aren’t only solved by TDD, they can also be solved by incremental unit testing.


About Alex McMahon

I am a software developer, interested in .net, agile, alt.net. I've previously specialised with .net 3.0 technologies like WCF, whereas now I am trying to specialise in agile development and best practice and patterns. I am obsessed with looking at the latest technologies, tools, and methods, and trying them out. I am currently employed by Rockwell Collins in the UK.
This entry was posted in agile, alt.net, methodology, TDD, testing. Bookmark the permalink.

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