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', () => {