ralucaoanapopa / learn-jest

Learning jest following tutorial from test automation university

Note

This is created based on Jest Javascript testing framework course from Test Automation University by instructor Toyer Mamoojee

Setup

• NodeJS
• NPM

Execute in terminal:

node -v

npm -v

npm init -y

npm install --save-dev jest

Run tests

run all from project:

npm run test

run single test file

npm run test <file_name>.test.js

run single test in file using test.only() instead of test()

run tests in watch mode

npm run test:watch

Resources

Tools

• JEST - javascript testing framework
• expect doc
• matchers
• setup + teardown
• CLI options
• Testing asynchronous code
• Snapshot testing with Jest

3 ways to handle asynchnous testing in Jest:

• Callbacks
• Promises
• async / await