import http from 'http'; import SignalingServer from '../../../../app/server/index'; describe('signaling server', () => { let server: typeof SignalingServer; beforeEach(() => { server = SignalingServer; }); afterEach(() => { server.stop(); }); it('start() should return http.Server', async () => { const res = await server.start(); expect(res instanceof http.Server).toBe(true); }); });