Hacker Rank

anna_brian.js

// https://www.hackerrank.com/challenges/bon-appetit/problem?utm_campaign=challenge-recommendation&utm_medium=email&utm_source=7-day-campaign&isFullScreen=true

const assert = require('assert');

function bonAppetit(bill, k, b) {
   let amount = calculateBill(removePosition(bill, k));
   let change = b - amount;
   console.log(change == 0 ? 'Bon Appetit' : change);
}

function removePosition(arr, i) {
   const arr2 = [...arr];
   arr2.splice(i, 1);
   return [...arr2];
}

function calculateBill(arr) {
   let sum = arr.reduce((acc, next) => acc + next, 0);
   return sum / arr.length;
}


describe('bill', () => {

   it('bonAppetit', () => {

      const bill = [2, 4, 6];
      const k = 2;
      const b = 5;

      const expected = 2;

      const result = bonAppetit(bill, k, b);

      assert.equal(result, expected);
   });

   it('bonAppetit2', () => {

      const bill = [2, 4, 6];
      const k = 2;
      const b = 3;

      const expected = 'Bon Appetit';

      const result = bonAppetit(bill, k, b);

      assert.equal(result, expected);
   });

   it('calculateBill', () => {

      const input = [6, 10];
      const expected = 8;

      const result = calculateBill(input);

      assert.equal(result, expected);
   });

   it('removePosition', () => {
      const input = [1, 2, 3, 4];
      const expt = [1, 3, 4];

      const result = removePosition(input, 1);

      assert.deepEqual(result, expt);
      assert.notDeepEqual(result, input);
   });
});