const expect = require('expect'); const objectFromPairs = require('./objectFromPairs.js'); test('objectFromPairs is a Function', () => { expect(objectFromPairs).toBeInstanceOf(Function); }); test('Creates an object from the given key-value pairs.', () => { expect(objectFromPairs([['a', 1], ['b', 2]])).toEqual({a: 1, b: 2}); });