Complete Git Guide: Understand and Master Git and GitHub - Installing the Jest NPM Package for Testing

In this video tutorial, the instructor guides viewers through setting up a Node.js application using the NPM INIT command. A README.md file is added, and the package.json file is examined. The instructor demonstrates installing the Jest package as a development dependency using the NPM install command with the -D flag. The importance of adding node_modules to the .gitignore file is explained. The video concludes with a demonstration of configuring and running Jest tests, noting that no tests are currently present. The next lecture will cover creating modules and sample tests.

What command is used to initialize a new Node.js application?

• npm start

• npm init

• npm install

• npm run

What error message appears when running 'npm test' without any tests specified?

• No package.json found

• No test script defined

• Error: no test specified

• Test failed

Which command is used to install a package as a development dependency?

• npm install --save

• npm install -D

• npm install --global

• npm install -g

Why should the node_modules folder be added to the .gitignore file?

• To improve application performance

• To avoid committing unnecessary files

• To prevent errors during deployment

• To reduce the size of the repository

What is the outcome of running 'npm test' after configuring Jest but without any test files?

• Tests pass successfully

• No tests found, exiting with code 1

• Syntax error in test files

• Jest installation error