chore(test): scaffold vitest and add waitlist route tests#3
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Adds vitest as a devDependency with test/test:watch scripts and a vitest.config.ts that aliases @/ to repo root and runs in the node environment (Cloudflare Workers' nodejs_compat flag matches). Covers the waitlist POST handler across all 8 branches: - missing/invalid email (400) - missing NOTION_TOKEN or NOTION_WAITLIST_DB_ID (500) - no A/B variant (Notion payload without Variant, no trackConversion) - variant 'A' assigned (Variant select + trackConversion called) - Notion API non-ok response (500) - malformed request body (500 via outer catch) Resolves audit TEST-08 (.audit-report.md). Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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This was referenced May 23, 2026
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Summary
Mocking strategy: `vi.mock('@/lib/ab-testing', ...)` for `getVariant` / `trackConversion`, `vi.stubEnv` for env vars (with `vi.resetModules()` + dynamic `import()` of the route per test because env is captured at module-load time), `vi.spyOn(global, 'fetch')` for the Notion call.
Resolves audit TEST-08 from `.audit-report.md`. This is the first test in the repo — the waitlist is the only ingress for real user data so getting coverage here was the highest-leverage starting point.
Test plan
🤖 Generated with Claude Code