Test-Driven Development (TDD) FAQs

Question 1

When should I use the TDD skill in Claude Code?

Accepted Answer

Use TDD for complex logic, business rules, and algorithms where bugs are likely. It is also essential when you need 100% confidence in critical code paths.

Question 2

Why must I watch the test fail first?

Accepted Answer

Watching a test fail (the Red phase) proves that the test is actually checking the intended behavior and won't give a false positive once the code is written.

Question 3

Is TDD required for UI components or simple CRUD?

Accepted Answer

No, this skill recommends skipping TDD for React components, straightforward mappings, and simple CRUD operations to maintain development speed.

Question 4

What is the core rule of this TDD skill?

Accepted Answer

The core rule is: No implementation code without a failing test first. If code is written before the test, it should be deleted and rewritten following the TDD cycle.

Question 5

How does the Refactor phase work in this skill?

Accepted Answer

Once a test passes (Green), you clean up duplication and improve names while running the tests continuously to ensure the behavior remains correct.

Test-Driven Development (TDD)

Key Features

Use Cases

Test-Driven Development (TDD)

Key Features

Use Cases