const expect = require('expect'); const forOwnRight = require('./forOwnRight.js'); test('forOwnRight is a Function', () => { expect(forOwnRight).toBeInstanceOf(Function); }); let output = []; forOwnRight({ foo: 'bar', a: 1 }, v => output.push(v)); test('Iterates over an element\'s key-value pairs in reverse', () => { expect(output).toEqual([1, 'bar']); });