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