Tag Archive: railsconf: Social Memory Complex

RailsConf Dispatch - Test Always?
How not thinking carefully about your test suite can hold you back

There were two conveniently sequential presentations today at RailsConf that reminded me of some thoughts I'd had regarding testing: Michael Feathers' talk on legacy code and Glenn Vanderberg's talk on real software engineering. It seems to me that both talks had a theme in common: what is the function of tests? Why do we want them, what role do they play from an engineering perspective in the larger process, and what precisely are they meant to indicate to us?

Michael at one point talked about the expense of 100% code coverage for tests, instead recommending we test the parts of the code that change the least and are most important. Ugly code in legacy projects has utility, he explained, and untested code is a rational response to churn. Afterwards, Glenn discussed software development in the context of engineering principles from older, more established disciplines like structural engineering, finding areas of similarity, analogy, and abject difference. However, his testing point compared experiments in code to experiments in more physical engineering fields, remarking on how relatively cheap tests are for us. I suppose the common thread I found concerned the emphasis on cost: that what it means for us to do our job well is to do it effectively, and not subordinate our conscience and creativity to a mechanical process.

For some background, I've been practicing behavior driven development for a year or two. I love the confidence that testing gives me, independent of the value to the client. Verifying that my code works is fine and all, but what lets me sleep at night is the assurance derived from approaching a problem in a rational, systemic manner. By moving in small chunks and expressing problems in terms I understand well enough to programmatically recreate, I ground myself in a real comprehension of the system I'm building at the most relevant level and stage. I avoid the confusion of jumping ahead, thinking too large scale or minutely, or making unwarranted assumptions that come back to bite.


Written on Tuesday, June 08, 2010
Tags: ruby, rails, bdd, testing, development, railsconf

RailsConf Dispatch - Rescue Missions
Tammer Saleh on parachuting into disaster codebases

The first tutorial class at RailsConf on Rails Anti-Patterns has been phenomenal and incredibly validating given my experiences with consulting. Tammer Saleh gave a wonderful talk on how to handle troubled legacy codebases - what he calls "rescue missions". It's particularly relevant for me as much of my early freelance work centered on failing projects I was dumped into.

Because of the success of Rails, there's a lot of shitty code out there for you to fix. The harder issue is figuring out why shitty code was delivered, which can be trickier to figure out than you'd think. It can be really difficult to change the course of a project when much more than merely the code is dysfunctional.

Tammer suggested a ton of coping strategies, many of which end up being good practices for most situations. I'm sharing my cursory notes here in case others are interested. Feel free to strike up a conversation in the comments to explore these points. I'll link to the slides when they become available.


Written on Monday, June 07, 2010
Tags: railsconf, refactoring, development, ruby, rails