third_party/WebKit/LayoutTests/http/tests/serviceworker/resources/fetch-response-xhr-worker.js

   1 self.addEventListener('fetch', function(event) {
   2     var url = event.request.url;
   3     if (url.indexOf('dummy?test') == -1) {
   4       return;
   5     }
   6     event.respondWith(new Promise(function(resolve) {
   7         var headers = new Headers;
   8         headers.append('foo', 'foo');
   9         headers.append('foo', 'bar');
  10         resolve(new Response('hello world', {'headers': headers}));
  11       }));
  12   });