import { Asidenav } from './asidenav'; describe('Asidenav', () => { let asidenav; beforeEach(() => { const element = document.createElement('div'); asidenav = new Asidenav(element); }); it('should create', () => { expect(asidenav).toBeTruthy(); }); it('should throw if called without an element', () => { expect(() => { new Asidenav(); }).toThrow(); }); });