Mastery of TDD
Advance your TDD skills to mastery. Learn advanced techniques, best practices, and expert strategies for test-driven development with TDD Buddy.
A collection of references and practices to build your mastery of TDD.
Once the red–green–refactor rhythm is second nature, the craft shifts from following the cycle to making better design decisions inside it. The guides below dig into that next layer: spotting the test smells that signal a design problem, breaking dependencies so units can be tested in isolation, applying SOLID principles to keep code malleable, choosing the refactoring that pays off most, and building test data and vocabulary that keep your suite readable as it grows. Work through them alongside the harder katas in the catalog and the lessons will stick.
Common mistakes in applying TDD. Recognize the patterns that signal your tests need attention.
Mocks, stubs, fakes — what to use when. Learn to isolate units and break tight coupling in your tests.
SOLID principles made simple. Understand how each principle shapes testable, maintainable code.
How to identify your next refactoring. Prioritize changes that deliver the most design improvement.
Builders, Object Mothers, and Scenario Factories. Turn test setup into a composable, domain-language API agents and humans can read.
Keep the language of the business, the code, and the tests converged. A practical guide to stopping vocabulary drift.