TDD bootstrap for js with mocha+chai. use 'curl <raw> | bash -s <folder>'

tdd-bootstrap-js-mocha-chai.sh

#!/usr/bin/env bash

if [ $# -ge 1 ]
  then
    # jump to folder
    target="$1"
    mkdir -p "$target"
    cd "$target"
fi

# init
npm init -y
npm i -d mocha chai 

# create red test
mkdir test
read -d '' first_test << EOF
const expect = require('chai').expect;

describe('World', function() {
    it('red', function() {
        expect('foo').to.equal('bar')
    })
});
EOF
echo "$first_test" > test/test.js

# point 'npm test' to mocha
npm i -g json
json -I -f package.json -e 'this.scripts.test="mocha"'
json -I -f package.json -e 'this.scripts["test:watch"]="mocha -R min -w"'

# init git
curl https://www.toptal.com/developers/gitignore/api/node,intellij+all,eclipse,visualstudiocode,windows,linux,macos --output .gitignore
git init
git add -A

# run tests
npm run test:watch