text: 'use strict';
  
  const solution = require('../lib/solution');
  
  describe('Solution Module', () => {
    describe('exponentSum', () => {
      it('should ', () => {
        expect(solution.exponentSum(4,5)).toEqual(7);
      });
      it('should only accept Numbers as an arguemt', () => {
        expect(solution.exponentSum('4', '5')).toEqual('Invalid input');
      });
      it('should only accept whole numbers as an arguement', () => {
        expect(solution.exponentSum(4.878, 8.90)).toEqual('Must be whole number');
      });
      it('should error out if there is not argument', () =>  {
        expect(solution.exponentSum()).toEqual('Invalid input');
      });
  
    });
  });