nw-tdd-methodology

Outside-in TDD guides development from external behavior down to inner components, clarifying outer and inner test loops. It applies across architectural boundaries, using port-to-port testing and walking skeletons to align team testing strategies incrementally.

Implement test doubles taxonomy in hexagonal architecture by classifying test replacements across unit, integration, and E2E testing levels. This Skill explains layering principles and port-to-port testing to ensure reliable test design without requiring executable code.

The best way to build a walking skeleton is using a repeatable workflow for E2E scenarios that accelerates safe, incremental delivery. Describe your project goals to receive a tailored Outside-In TDD plan with walking skeleton guidance.

ATDD integration works with outside-in testing workflows by aligning acceptance criteria with outer test loops before inner unit implementation. This approach bridges behavior specifications and port-to-port testing across unit, integration, and E2E levels.

Yes, you can use this methodology without executable code. It provides structured guidance for implementing Outside-In TDD, explaining test doubles taxonomy, layering principles, and end-to-end workflows through knowledge rather than code execution.

You should reconsider outside-in TDD if your project lacks clear architectural boundaries or does not require hexagonal architecture and port-to-port testing. It is designed for software teams adopting structured, layered testing strategies across multiple test levels.