Add Vitest harness and characterization tests for voice surface - #6
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Sets up the test infrastructure (Vitest, React Testing Library, MSW, happy-dom) and locks in current behavior of the voice features Lilian shipped without tests. From here forward, new code on this project follows red-green TDD; this commit is characterization-only. Coverage: - src/lib/speech.test.ts — chunkBySentence sentence splitting (8 cases) - src/app/api/tts/route.test.ts — Polly client, voice allowlist, text truncation, audio response, error paths (9 cases) - src/app/api/stt/route.test.ts — Google STT request shape, transcript joining, error propagation (7 cases) - src/hooks/useSpeechOutput.test.tsx — regression: voiceId param overrides defaultVoice (the bug Lilian fixed where the stage opener used the wrong Polly voice because React state hadn't propagated) (3 cases) - src/app/api/chat/route.test.ts — regression: 503 retry with backoff, no retry on non-503, no retry on success (4 cases) CI runs npm run test:ci on push and PR to main/dev. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
From here forward, new code on this project follows red-green TDD; this commit is characterization-only (locks in current behavior so future changes can't silently regress).
Coverage
Deferred (follow-up PR)
Test plan
🤖 Generated with Claude Code