Unit Testing React with RTL

This project was bootstrapped with Create React App.

Getting Started

git clone https://github.com/JoshuaKGoldberg/unit-testing-react-with-rtl
cd unit-testing-react-with-rtl
npm i
npm start

Available Scripts

In the project directory, you can run:

npm start

Runs the app in the development mode. Open http://localhost:3000 to view it in your browser.

The page will reload when you make changes. You may also see any lint errors in the console.

npm test

Launches the test runner in the interactive watch mode. See the section about running tests for more information.

• Tip: use npm test --watch to start the test runner in watch mode
• Tip: use npm test filename to only tests files matching that filename

Tests are written using:

• Jest
• React Testing Library ("RTL")

Tests We'll Cover

1. src/App.test.js: Setting up RTL in a Jest test
2. src/components/FavoriteStar.test.js: Using get* queries to select elements
3. src/components/FavoriteStarDelayed.test.js: Using query* and find* queries to select elements
4. src/components/Select.test.js: Using mock functions and simulating user events
5. src/hooks/useLocalStorageItem.test.js: Mocking out React hooks