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Introduction to Test Driven Development: Unveiling the Power of TDD

A real code demonstration of TDD on the Prime Factors kata: why it is more than test-first, why baby steps matter, and how the tests drive the design.

Alex Brown · · 1 min read

A simple introduction to test-driven development (TDD), using a real code demonstration to show:

  • It is more than a test-first approach. Writing a failing test and making it pass is only the start.
  • Baby steps matter. The three laws of TDD, applied in practice.
  • It is mostly about design. Let the tests drive the creation of the production code.

Tackling the Prime Factors kata with a TDD approach shows all three principles in action, and this:

"As the tests get more specific, the code gets more generic."

Robert C. Martin

TDD is one of the value-added practices that help a development team deliver a potentially releasable Increment at the end of every Sprint. For how AI fares at the same kata, read Can AI generate high-quality code?

If you would like help bringing these practices to your team, including running coding dojos and applying katas like Prime Factors, talk to us about technical coaching.