Test-Driven Development (TDD) FAQs

Question 1

Can I use this skill when fixing bugs?

Accepted Answer

Yes. The skill requires writing a failing test that reproduces the bug before any fix is implemented, ensuring the issue is truly resolved and won't regress in the future.

Question 2

What is the primary benefit of the TDD skill for Claude Code?

Accepted Answer

It ensures that every line of production code is preceded by a failing test, which proves the test is valid and prevents the introduction of untested behavior or hidden bugs.

Question 3

How does the Red-Green-Refactor cycle work in this skill?

Accepted Answer

The cycle starts by writing a failing test (Red), followed by implementing the simplest possible code to pass that test (Green), and finally cleaning up the code structure (Refactor) while keeping the tests passing.

Question 4

Does this skill allow for 'test-after' development?

Accepted Answer

No. This skill strictly follows the 'Iron Law' of TDD, which mandates that production code written before a test must be deleted to maintain development integrity and proof of testing.

Question 5

When should I skip using the TDD cycle?

Accepted Answer

TDD is recommended for all production features. Exceptions are generally limited to throwaway prototypes, generated code, or basic configuration files, usually after consulting with a human partner.

Test-Driven Development (TDD)

About

Key Features

Use Cases

Test-Driven Development (TDD)

About

Key Features

Use Cases