const expect = require('expect'); const isPromiseLike = require('./isPromiseLike.js'); test('Testing isPromiseLike', () => { //For more information on all the methods supported by tape //Please go to https://github.com/substack/tape expect(typeof isPromiseLike === 'function').toBeTruthy(); expect(isPromiseLike({ then: function() { return ''; } })).toBe(true); expect(isPromiseLike(null)).toBe(false); expect(isPromiseLike({})).toBe(false); });