Test Driven Development

August 24, 2005 on 10:21 pm | In 31 Days to a Better Blog, Geek |

I’m just about to finish reading Test Driven Development: By Example - written by Kent Beck. Well I’m actually due to finish it on the bus to work tomorrow morning, but thought that I would post about it tonight while it is reasonably fresh in my mind.

For those who don’t know - by day I am a Software Developer working on software for the Accounting Practice industry. Just about all of my development work is done using Microsoft VB6 and Microsoft Access - But over the last few months I have been developing using the Microsoft C# programing language and the MS .Net framework.

Up until today, my software testing methods have probably been somewhat un-structured. But after getting through the first two chapters of Test Driven Development: By Example I thought I could try a change. When I got to work I cranked up my PC - and continued to work on something that has been giving me grief for the best part of the previous 1 to 2 days.

However - today I approached the problem armed with NUnit and my newly aquired knowledge of Test Driven Development - and even though the first hour or two was a combined mixture of work and getting myself aquainted with my new methodology - I was astounded to develope a solution for my problem not long after finishing my lunch. And with hardly any swearing or violent thoughts! - and it was pretty much from scratch having binned the previous code because it was getting way too gnarly!

You see, the trick with Test Driven Development is to write the tests first! Which I found a little perplexing when I started reading about it. But by doing this you are breaking down the Complex Bigger Problem into Smaller Achievable Goals. Starting with something that blatantly doesn’t work - and making sure that each goal works fully before moving onto the next.

To me this sounded like a laborious and tiresome activity. And I have to admit that as I progressed through the morning I wasn’t sure that I was actually getting much done. However - suddenly - after lunch - I had a Fully Functioning product of what I had been trying to achieve for the last couple of days!

Now that I’ve had time to dwell on todays experience after writing it down - I’m wondering what else, apart from software development, Test Driven Development could be applied to. I reckon you could probably get quite philosophical about the whole thing.

Anyway, I’m going to have to try and get some kind of TDD system set up for my VB6 development environment - because I think I’m going to miss it.

And thanks to Maruis Marais for the lend of the book.

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I am just happy that you have found the new way of thinking and developing in Test-Driven Development such a pleasurable experience. It is funny, although the name Test-Driven Development would make you think it is a test centric activity in development. But it is actually more of a Test-Driven Design activity.

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