React Testing

What this module covers

5 steps · React

1. Step 1. Lesson: React Testing

   Test behavior from the user perspective with accessible queries, interactions, async assertions, and controlled dependencies. Learning objectives - Recognize when react testing is the right tool. - Explain the role of render, screen, userEvent. - Build a small working example before combining it with a larger interface. - Identify one accessibility, maintainability, or error-handling improvement. Read the example, predict what it will do, then complete the small change described in the check question.

   Test behavior from the user perspective with accessible queries, interactions, async assertions, and controlled dependencies. In React, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [React] Use the example to demonstrate react testing.

2. Step 2. Quiz: React Testing

   Check your understanding of React Testing.

   Role-based queries encourage accessible markup and match user interaction. In React, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [React] Complete the knowledge check.

3. Step 3. Exercise: React Testing

   Test a form through labels, typing, validation feedback, submission, and a failed request.

   This exercise turns the React Testing lesson into a working code change. In React, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [React] Does the solution use render and screen and userEvent?

4. Step 4. Review lab: Explain & improve React Testing

   Rebuild the exercise without copying the solution. Then improve it in two ways: make the code easier to understand and add one useful edge case, responsive behavior, accessibility improvement, or error state. Finally, write a short explanation of how render, screen, userEvent work together.

   Rebuilding from memory and improving an edge case turns recognition into durable skill. In React, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [React] Does the improved version still use render, screen, userEvent clearly?

5. Step 5. Mini project: React Testing

   Create a confidence-building test suite for a complete React feature including unit, integration, accessibility, and async behavior.

   The mini project combines the module lesson, quiz, and exercise into one portfolio-ready result. In React, make the state/interaction visible in the UI so completion is easy to verify.

   Check yourself: [React] Does the project apply the module's react testing skills?