const expect = require('expect'); const {isObjectLike} = require('./_30s.js'); test('isObjectLike is a Function', () => { expect(isObjectLike).toBeInstanceOf(Function); }); test('Returns true for an object', () => { expect(isObjectLike({})).toBeTruthy(); }); test('Returns true for an array', () => { expect(isObjectLike([1, 2, 3])).toBeTruthy(); }); test('Returns false for a function', () => { expect(isObjectLike(x => x)).toBeFalsy(); }); test('Returns false for null', () => { expect(isObjectLike(null)).toBeFalsy(); });