TDD with AI: Claude Writes Tests First, Then the Implementation

Short summary

Claude Code removes test-driven development friction by auto-generating test files from specifications and implementations that strictly pass those tests. AI handles API design, edge-case coverage, and motivation, converting test-first from discipline into workflow. Concrete example: Claude generates a vitest suite for a schedule parser in multiple languages, then a minimal implementation satisfying all tests.

• •Claude auto-generates test specs and implementations, removing TDD friction
• •AI suggests edge cases and handles API design, solving three common TDD barriers
• •Concrete workflow demonstrated: spec → tests → implementation with real vitest example

Generated with AI, which can make mistakes.