chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/resources/fetch-event-network-error-worker.js

// Test that multiple fetch handlers do not confuse the implementation.
self.addEventListener('fetch', function(event) {});

self.addEventListener('fetch', function(event) {
    var testcase = new URL(event.request.url).search;
    switch (testcase) {
    case '?reject':
      event.respondWith(Promise.reject());
      break;
    case '?prevent-default':
      event.preventDefault();
      break;
    case '?prevent-default-and-respond-with':
      event.preventDefault();
      break;
    case '?unused-body':
      event.respondWith(new Response('body'));
      break;
    case '?used-body':
      var res = new Response('body');
      res.text();
      event.respondWith(res);
      break;
    case '?unused-fetched-body':
      event.respondWith(fetch('other.html').then(function(res){
          return res;
        }));
      break;
    case '?used-fetched-body':
      event.respondWith(fetch('other.html').then(function(res){
          res.text();
          return res;
        }));
      break;
    case '?throw-exception':
      throw('boom');
      break;
    }
  });

self.addEventListener('fetch', function(event) {});

self.addEventListener('fetch', function(event) {
    var testcase = new URL(event.request.url).search;
    if (testcase == '?prevent-default-and-respond-with')
      event.respondWith(new Response('responding!'));
  });

self.addEventListener('fetch', function(event) {});