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Next.js 15 Fullstack (App Router + Server Actions) · Lesson

Integration Testing Pages

Perform integration tests for Next.js pages and API routes to ensure different parts of your application work together.

Intro to Integration Tests

Welcome! In this lesson, we'll explore integration testing for your Next.js applications.

Integration tests verify that different parts of your application work correctly together. Instead of isolated units, we check the flow between components, pages, and API routes.

Why Test Pages & Routes?

For Next.js, integration testing is crucial because it ensures:

  • Pages render correctly with their data.
  • User interactions (like form submissions) trigger the right backend logic.
  • API routes respond as expected when called from the frontend or other services.

It helps catch issues that unit tests might miss when components interact.

All lessons in this course

  1. Unit Testing Components
  2. Integration Testing Pages
  3. E2E with Playwright/Cypress
  4. Mocking & Testing API Routes
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