const expect = require('expect'); const runPromisesInSeries = require('./runPromisesInSeries.js'); test('Testing runPromisesInSeries', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof runPromisesInSeries === 'function').toBeTruthy(); const delay = d => new Promise(r => setTimeout(r, d)); runPromisesInSeries([() => delay(100), () => delay(200).then(() => )]); });