const expect = require('expect'); const everyNth = require('./everyNth.js'); test('Testing everyNth', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof everyNth === 'function').toBeTruthy(); expect(everyNth([1, 2, 3, 4, 5, 6], 2)).toEqual([ 2, 4, 6 ]); });