src/third_party/WebKit/LayoutTests/http/tests/serviceworker/service-worker-gc.html

   1 <!DOCTYPE html>
   2 <script src="/js-test-resources/js-test.js"></script>
   3 <body>
   4 <script>
   5 window.jsTestIsAsync = true;
   6 description('Test that a registered Service Worker with an event handler is not garbage collected prematurely');
   7 swObservation = null;
   8 scope = 'gc';
   9
  10 if (!window.internals) {
  11     testFailed('This test requires internals.observeGC');
  12     finishJSTest();
  13 } else {
  14     setup();
  15 }
  16
  17 function setup() {
  18     var worker = 'resources/empty-worker.js';
  19     unregisterAndRegister(worker, scope).then(onRegister);
  20 }
  21
  22 function unregisterAndRegister(url, scope) {
  23     return navigator.serviceWorker.unregister(scope).then(function() {
  24         return navigator.serviceWorker.register(url, { scope: scope });
  25     }).catch(function(error) {
  26         testFailed('Could not register worker: ' + error);
  27         finishJSTest();
  28     });
  29 }
  30
  31 function assertServiceWorkerIsNotCollected() {
  32     gc();
  33     shouldBeFalse('swObservation.wasCollected')
  34 }
  35
  36 function onRegister(sw) {
  37     swObservation = internals.observeGC(sw);
  38     sw.addEventListener('statechange', onStateChange);
  39     setTimeout(assertServiceWorkerIsNotCollected, 0);
  40 }
  41
  42 function onStateChange(event) {
  43     assertServiceWorkerIsNotCollected();
  44
  45     if (event.target.state != 'active')
  46         return;
  47     navigator.serviceWorker.unregister(scope).then(onUnregister);
  48 }
  49
  50 function onUnregister()
  51 {
  52     // FIXME: Assert that the ServiceWorker *is* collected when the 'redundant' state is implemented.
  53     assertServiceWorkerIsNotCollected();
  54
  55     finishJSTest();
  56 }
  57 </script>
  58 </body>