Mocking and Testing Server Components
Test async Server Components, Server Actions, and route handlers by mocking data layers and network calls so your fullstack Next.js tests stay fast and reliable.
The Server Component Challenge
Server Components are async and run on the server, so classic client-render test tools do not fit perfectly. The key is to test their data dependencies in isolation and test the rendered output separately.
Separate Logic from Rendering
Extract data-fetching and business logic into plain functions. Pure functions are trivial to unit test without rendering anything.
export function formatPrice(cents) {
return '$' + (cents / 100).toFixed(2);
}All lessons in this course
- Unit and Integration Testing
- End-to-End Testing with Playwright
- Monorepos and Micro-frontends
- Mocking and Testing Server Components