I appreciate Mr. Zakharchenko’s extensive critique of TDD even as I have some reservations regarding his language. He tried TDD. He thought about it. He put his thoughts out there. He knew he was going to get a reaction & he did—300K views, 160 comments, 190 reposts, 1000 likes.

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Software Design: Tidy First?

The post discusses the missing skill in TDD called Behavioral Composition, which involves breaking a big complicated behavior into pieces, implementing and verifying those pieces, and having the confidence to work through the process. The post also describes a Toy Problem as an illustration of this skill. Finally, it highlights the role of tests in TDD, which is to restrict the scope of the problem and ensure that changes to the code work as intended.

TDD's Missing Skill: Behavioral Composition