added throwing an error when array with <3 items is passed

Author: devcer

Dynamic-Programming/MaxProductOfThree.js

@@ -8,7 +8,7 @@
 export function maxProductOfThree(arrayItems) {
  // if size is less than 3, no triplet exists
  let n = arrayItems.length
- if (n < 3) return -1
+ if (n < 3) throw new Error('Triplet cannot exist with the given array')
  let max1 = arrayItems[0],
  max2 = -1,
  max3 = -1,

Dynamic-Programming/tests/MaxProductOfThree.test.js

@@ -1,8 +1,10 @@
 import { maxProductOfThree } from '../MaxProductOfThree'
 
 describe('MaxProductOfThree', () => {
- it('expects to return -1 for array with only 2 numbers', () => {
- expect(maxProductOfThree([1, 3])).toBe(-1)
+ it('expects to throw error for array with only 2 numbers', () => {
+ expect(() => {
+ maxProductOfThree([1, 3])
+ }).toThrow('Triplet cannot exist with the given array')
  })
 
  it('expects to return 300 as the maximum product', () => {