let list = require('../second.js')
let assert = require('chai').assert


describe('Add delete list functionality tests', function(){

    let demo

    beforeEach(function(){
        demo = list.list
    })
    describe('add item tests',function(){
        it('it should initialize the list',function(){
            demo.add(1)
        assert(demo.list.toString()==='1','dosent initialize a list')
    })

    it('it should initialize and add multiple elems to the list',function(){
            demo.add(1)
            demo.add(2)
            demo.add('pesho')
        assert.equal(demo.toString(),'1, 2, pesho','dosent initialize a list')
        })
    })
})



// the function

let list = (function () {
  let data = []
  return {
    add: function (item) {
      data.push(item)
    },
    delete: function (index) {
      if (Number.isInteger(index) && index >= 0 && index < data.length) {
        return data.splice(index, 1)[0]
      } else {
        return undefined
      }
    },
    toString: function () {
      return data.join(', ')
    }
  }
})()

module.exports = {list}