AI QA built for Next.js
Next.js apps are complex — App Router conventions, server components, API routes, middleware, ISR caching. VibeProof reads your Next.js codebase and generates test cases that cover the patterns traditional testing misses.
What VibeProof tests
- Route handler testing — validates GET, POST, PATCH, DELETE handlers for auth, input validation, and error responses
- Server Component data fetching — catches missing error boundaries, loading states, and cache invalidation bugs
- Middleware logic — tests auth redirects, header manipulation, and path matching edge cases
- API route security — parameterized query checks, CORS headers, rate limiting gaps
- Static generation — ISR revalidation timing, fallback behavior, dynamic route edge cases
- Client/server boundary — ensures "use client" directives are correct and server-only code stays server-side
Why this matters
Next.js has more implicit behavior than any other React framework. File-based routing, server component defaults, automatic code splitting, middleware execution order — each one is a potential source of bugs that only surface in production. VibeProof understands these conventions and tests for them.
Example test cases
API route missing auth middleware
1.Send GET request to /api/user/settings without session cookie
2.Verify response status code
3.Check response body for user data
Expected: 401 Unauthorized response with no user data exposed
Server Component error boundary
1.Navigate to page that fetches from external API
2.Simulate API returning 500 error
3.Verify page renders error state
Expected: Error boundary catches failure, displays fallback UI, no white screen
FAQ
Does VibeProof work with Next.js App Router?+
Yes. VibeProof understands App Router conventions — route groups, parallel routes, intercepting routes, server/client components, and the metadata API.
Does it test API routes?+
Yes. VibeProof generates test cases for every API route handler, covering auth, input validation, error handling, and response format consistency.
What about Pages Router?+
VibeProof supports both App Router and Pages Router. It detects which routing pattern your project uses and generates appropriate test cases.
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