const expect = require('expect'); const mapObject = require('./mapObject.js'); test('Testing mapObject', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof mapObject === 'function').toBeTruthy(); expect(mapObject([1, 2, 3], a => a * a)).toEqual({ 1: 1, 2: 4, 3: 9 }); expect(mapObject([1, 2, 3, 4], (a, b) => b - a)).toEqual({ 1: -1, 2: -1, 3: -1, 4: -1 }); expect(mapObject([1, 2, 3, 4], (a, b) => a - b)).toEqual({ 1: 1, 2: 1, 3: 1, 4: 1 }); });