chromium/third_party/blink/web_tests/external/wpt/service-workers/service-worker/websocket.https.html

<!DOCTYPE html>
<title>Service Worker: WebSocket handshake channel is not intercepted</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="resources/test-helpers.sub.js?pipe=sub"></script>
<script>

promise_test(function(t) {
    var path = new URL(".", window.location).pathname
    var url = 'resources/websocket.js';
    var scope = 'resources/blank.html?websocket';
    var host_info = get_host_info();
    var frameURL = host_info['HTTPS_ORIGIN'] + path + scope;
    var frame;

    return service_worker_unregister_and_register(t, url, scope)
      .then(function(registration) {
          t.add_cleanup(function() {
              return service_worker_unregister(t, scope);
            });

          return wait_for_state(t, registration.installing, 'activated');
        })
      .then(function() { return with_iframe(frameURL); })
      .then(function(f) {
          frame = f;
          return websocket(t, frame);
        })
      .then(function() {
          var channel = new MessageChannel();
          return new Promise(function(resolve) {
            channel.port1.onmessage = resolve;
            frame.contentWindow.navigator.serviceWorker.controller.postMessage({port: channel.port2}, [channel.port2]);
          });
        })
      .then(function(e) {
          for (var url in e.data.urls) {
            assert_equals(url.indexOf(get_websocket_url()), -1,
                          "Observed an unexpected FetchEvent for the WebSocket handshake");
          }
          frame.remove();
        });
  }, 'Verify WebSocket handshake channel does not get intercepted');
</script>