const expect = require('expect'); const forOwnRight = require('./forOwnRight.js'); test('Testing forOwnRight', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof forOwnRight === 'function').toBeTruthy(); let output = []; forOwnRight({ foo: 'bar', a: 1 }, v => output.push(v)); // 'bar', 1 expect(output).toEqual([1, 'bar']); });