const expect = require('expect'); const collectInto = require('./collectInto.js'); test('collectInto is a Function', () => { expect(collectInto).toBeInstanceOf(Function); }); const Pall = collectInto(Promise.all.bind(Promise)); let p1 = Promise.resolve(1); let p2 = Promise.resolve(2); let p3 = new Promise(resolve => setTimeout(resolve, 2000, 3)); test('Works with multiple promises', () => { Pall(p1, p2, p3).then(function(val){ expect(val).toBe([1,2,3]);}, function(reason){}); });