Service Worker Suite

• should register a service worker and cache file on install32ms ‣

  // 1: Register service worker.
  // 2: Wait for service worker to install.
  // 3: Check cache was performed correctly.
  return navigator.serviceWorker.register('/sw.js'); //.then((reg) => {
  //return window.__waitForSWState(reg, 'installed');
  //});