const expect = require('expect'); const remove = require('./remove.js'); test('Testing remove', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof remove === 'function').toBeTruthy(); expect(remove([1, 2, 3, 4], n => n % 2 === 0)).toEqual([2, 4]); });