tRPC

Testing

tRPC React Query Testing: Hooks, Mutations, and Optimistic Updates

Testing tRPC hooks means testing React Query hooks — and that means dealing with providers, async state transitions, and cache behavior. This post covers how to set up a minimal tRPC + QueryClient test wrapper, how to test loading, error, and success states with React Testing Library, how to verify optimistic updates

Testing

tRPC with Next.js App Router Testing: Server Context and Router Tests

tRPC's createCaller() lets you call router procedures directly in tests — no HTTP server, no fetch mocking, no supertest. You inject the context (auth session, database client) yourself, which means you can test authenticated and unauthenticated flows, input validation, middleware enforcement, and error handling with plain function calls. This