<!DOCTYPE html>
<title>Service Worker: postMessage Blob URL</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script>
promise_test(t => {
    let script = 'resources/postmessage-blob-url.js';
    let scope = 'resources/blank.html';
    let registration;
    let blobText = 'Blob text';
    let blob;
    let blobUrl;

    return service_worker_unregister_and_register(t, script, scope)
      .then(r => {
          add_completion_callback(() => r.unregister());
          registration = r;
          let worker = registration.installing;
          blob = new Blob([blobText]);
          blobUrl = URL.createObjectURL(blob);
          return new Promise(resolve => {
            navigator.serviceWorker.onmessage = e => { resolve(e.data); }
            worker.postMessage(blobUrl);
          });
        })
      .then(response => {
          assert_equals(response, 'Worker reply:' + blobText);
          URL.revokeObjectURL(blobUrl);
          return registration.unregister();
        });
  }, 'postMessage Blob URL to a ServiceWorker');
</script>