const expect = require('expect'); const sumPower = require('./sumPower.js'); test('Testing sumPower', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof sumPower === 'function').toBeTruthy(); expect(sumPower(10)).toBe(385); expect(sumPower(10, 3)).toBe(3025); expect(sumPower(10, 3, 5)).toBe(2925); });