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