Code 1) Deep Clone

Readme

Clone.js 
it contaim the deep clone function.

Clone.test.js
it Contain the test case. 

Package.json 
dependencies for JEST.

To start 
node Clone.js

To test
npm install 
npm test

Clone.js

const obj = {
  name: "Paddy",
  address: {
    town: "Lerum",
    country: "Sweden"
  }
}

function deepClone(obj) {
  return {...obj}
}

// console.log(deepClone(obj))

module.exports = deepClone;

Clone.test.js

const deepClone = require('./Clone');

test('checking both are same object ', () => {
  const obj = {
    name: "Paddy",
    address: {
      town: "Lerum",
      country: "Sweden"
    }
  }
  // checking both are same object 
  expect(deepClone(obj)).toEqual(obj);

});


test('checking its clone or not just returning same object', () => {
  const obj = {
    name: "Paddy",
    address: {
      town: "Lerum",
      country: "Sweden"
    }
  }
  // checking its clone or not just returning same object
  expect(deepClone(obj)).not.toBe(obj);
});

package.json

{
  "name": "CloneObject",
  "version": "1.0.0",
  "description": "",
  "main": "Clone.js",
  "scripts": {
    "test": "jest --coverage"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "devDependencies": {
    "jest": "^26.6.3"
  }
}