postmessage-blob-url.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /service-workers/service-worker/postmessage-blob-url.https.html - WPT Dashboard Interop Dashboard

<!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>