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David Julia

Engineering Manager at Pivotal Labs. I'm interested in: clean code, clean/comprehensive tests, agile approaches to software architecture, and how an organization itself can be agile.

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TDD Midlife Crisis: White-Box Testing & Refactoring Tests

I’ve been undergoing a "Test-Driven Development (TDD) Midlife Crisis", in which I've been critically examining how I test drive code. During this process, I've been thinking about the kinds of tests I write, how much I mock, when to mock, and other fundamental questions of test-driven development. Over my Thanksgiving vacation, I re-read the seminal book on TDD, Test-Driven Development By Example by Kent Beck. It's a quick enough read, which reminded me of something that I'd been saying for a while without fully understanding the implications: TDD is more about confidence in your code and designs than it is about proving correctness. Here’s how I went about re-familiarizing myself with this concept.

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Checklist for Deploying a Rails App to Heroku

So, you wanna deploy to Heroku… It’s super quick to get something up and running, but if you want a robust, production-ready system, you’ll have to do a bit more than just git push. Without further adieu here is my …

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