const express = require('express'); const router = express.Router(); let spells = [ { id: 1001, name: "Rabbit foot positivity", ingredients: [ {name:"Foot of rabbit"}, {name:"Juice of beetle"}], result: "Good luck" }, { id:1002, name: "Fox exeunta", ingredients: [ {name:"Foul of lion"}, {name:"Spirit of hobo"}], result: "Fox removed", }, { id:1003, name: "Hackus maximum", ingredients: [ {name:"Oxygenated hydrogen juice"}, {name:"Effluent of bean"}, {name:"Heat of joy"}], result: "Fast coding" } ]; // get all spells router.get('/', function(req, res){ res.json({"message":"no spells here"}); }); // get a specific spell router.get('/:id', function(req, res){ const spellId = req.params['id']; res.json(spells[0]); }); // update a specific spell router.put('/:id', function(req, res){ const spellId = req.params['id']; spell = {} }); // add a new spell router.post('/', function(req, res){ res.json(spells); let spell = { id:req.body.id, name: "Is this the right name for your spell and does it have any ingredients?", }; spells.push(spell); }); module.exports = router; How do I perform unit test for this? I have junit in one of the referenced libraries will include snippets of the code

express = require('express'); outer = express.Router(); id: 1001 , name: "Rabbit foot positivity", ingredients: [ \{name: "Foot of rabbit"\}, \{name: "Juice of beetle" }], result: "Good luck" id: 1002, name: "Fox exeunta", ingredients: [ \{name: "Foul of lion" }, \{name: "Spirit of hobo"\}], result: "Fox removed