March 11, 17:42
Dion discovers the pleasure of removing code. This is also by far the most enjoyable aspect of programming for me. When I'm able to remove code, it means that my understanding of the domain has deepened. Some times it's just picking up another Ruby insight that turns three template lines into one succinct expression. That's satisfying in the "getting closer to my tool" kind of way.
But more interesting is it when the domain model reveals itself. When once fuzzy associations and unsure delegations become crystalized abstractions. I've had this experience a good handful of times with both Rails and Basecamp. When it clicks and you spot the missing class or the deeper pattern, there's a unique burst of energy released. The light bulb that goes off.
And this is where I think test-driven development has been most rewarding. It gives you the courage to execute on the deeper understanding. To radically simplify through swift cuts and add missing bridges.
The few times where I haven't had the comforting confidence of a good test suite when discovering an insight have been some of the most frustration ever. The gold is right there, yours for the taking, but you dare not grasp for it in fear of what hidden traps you'll uncover. It's horrible.
Especially because the mind is now set on the gold. The regular joy of working with the rest of the code base drops below zero when you know that an executable insight is available.
So, like, do your tests, 'mkay?
Challenge by Dion Almaer on March 11, 17:52
Yes, thanks to the flushed out tests that we have, I was able to rip the engine to threads, yet know that it was running nicely again when I put in the new one :)
If it wasn't for that.... I would be crossing my fingers ;)
Btw, I like your comments on the domain. You are spot on there IMO. The reason that I did this refactoring was due to a big 'a ha' moment that the team had on the domain!
Cheers,
Dion
Challenge by Paul Smith on March 11, 23:50
While unit tests are fairly obviously applied to things projects like frameworks, it may be less obvious how one does test-driven development in a web application environment. Adoption of TDD could be sped up among Railers if there were some clear examples out there (unfortunately, the demo apps with open source that are pointed to usually don't have the tests fleshed out). It may also be helpful to indicate that in a web app, it's more likely that you'll be doing _functional_ tests, and since most folks associate unit testing with TDD, that could be a source of confusion.
So, more examples, please, and especially of functional tests.
Challenge by Rudi Cilibrasi on March 13, 9:22
I agree 100% with all of the comments above. I also really appreciate your taking the time to clearly articulate exactly what the difference with TDD is, because it just isn't obvious to most people till you hear it. I think this sort of explanation really does a lot to bring people in and I hope we see more of these single-issue process focus type articles.
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