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Rails 4 Test Prescriptions by Noel Rappin

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What We’ve Done

Using the TDD process of “write a simple test, write simple code to make it pass, and refactor,” we started our Rails application by creating some business logic.

What has the TDD process given us? We started with a requirement and it was not immediately clear how to turn it into an algorithm. By using TDD we were able to attack the problem incrementally, choosing to start in a small, well-understood corner and move outward as our understanding of the problem improved. It allowed us to easily change our code structure as we learned more about the solution.

Most importantly, we wrote better code. The solution we ended up with has short, well-named methods, it has logic in its proper place, and it will be easy to adjust as the requirements ...

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