343: Harnessing TDD for Seamless Code Evolution

A fast test suite enables an environment to refactor and try experimental designs

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When writing code with TDD, we must reevaluate our design if there is excessive friction. If the software is meant to evolve with the business, it must adhere to the rules that define it. By enabling automated byte-sized experiments, TDD ensures that feedback on changes is received. 

TDD is a cost-effective way to achieve self-testing code.  If your codebase is healthy, you can refactor and implement new features. A fast test suite enables an environment to refactor and try experimental designs. Quick tests increase the ability to evolve a design towards something more flexible. Concepts should mean a single thing based on the context in which the concepts are used.

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