Unit and Integration Testing
Write effective unit and integration tests for React components and Next.js functions using Jest and React Testing Library.
Why We Test Our Code
Welcome! In modern web development, especially with complex applications built with Next.js, ensuring your code works as expected is crucial. This is where testing comes in.
- Reliability: Tests prevent bugs and regressions.
- Maintainability: Well-tested code is easier to refactor and update.
- Confidence: You can deploy new features with greater assurance.
We'll focus on Unit Tests (small, isolated parts) and Integration Tests (how parts work together).
Setting Up Jest & RTL
Jest is a popular JavaScript testing framework, and React Testing Library (RTL) is a set of utilities for testing React components. Together, they form a powerful duo for Next.js apps.
First, install the necessary packages:
npm install --save-dev jest @testing-library/react @testing-library/jest-dom jest-environment-jsdomAll lessons in this course
- Unit and Integration Testing
- End-to-End Testing with Playwright
- Monorepos and Micro-frontends
- Mocking and Testing Server Components