Create a new directory for this project and open it
mkdir js-unit-testing
cd js-unit-testing
Use git
git init
Use npm
npm init -y
Open the project with VSCode
code .
Important: Create a .gitignore file with this content:
.DS_Store
node_modules
Install jest
npm i -D jest @types/jest
In the package.json file add the following line:
"type": "module",
In the package.json file add the following lines within the scripts block:
"scripts": {
"test": "NODE_OPTIONS=--experimental-vm-modules npx jest",
"test:watch": "NODE_OPTIONS=--experimental-vm-modules npx jest --watch"
},
Do initial commit (e.g. like this):
git add .
git commit -m "Initial commit"
Single run:
npm run test
Watch mode:
npm run test:watch
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