FileAPI/url/url-lifetime.html

<!doctype html>
<meta charset="utf-8">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
promise_test(t => {
  const blob_contents = 'test blob contents';
  const blob = new Blob([blob_contents]);
  const worker = new Worker('resources/create-helper.js');
  let url;
  return new Promise(resolve => {
    worker.onmessage = e => resolve(e.data);
    worker.postMessage({blob: blob});
  }).then(data => {
    url = data.url;
    let result = fetch(url);
    worker.terminate();
    return result;
  }).then(response => response.text()).then(text => {
    assert_equals(text, blob_contents);
    return new Promise(resolve => t.step_timeout(resolve, 100));
  }).then(() => promise_rejects_js(t, TypeError, fetch(url)));
}, 'Terminating worker revokes its URLs');

promise_test(t => {
  const blob_contents = 'test blob contents';
  const blob = new Blob([blob_contents]);
  const frame = document.createElement('iframe');
  frame.setAttribute('style', 'display:none;');
  frame.src = 'resources/create-helper.html';
  document.body.appendChild(frame);

  let url;
  return new Promise(resolve => {
    frame.onload = t.step_func(e => {
      resolve(e);
    });
  }).then(e => {
    frame.contentWindow.postMessage({blob: blob}, '*');
    return new Promise(resolve => {
      self.addEventListener('message', t.step_func(e => {
        if (e.source === frame.contentWindow) resolve(e);
      }));
    });
  }).then(e => {
    url = e.data.url;
    let fetch_result = fetch(url);
    document.body.removeChild(frame);
    return fetch_result;
  }).then(response => response.text()).then(text => {
    assert_equals(text, blob_contents);
    return new Promise(resolve => t.step_timeout(resolve, 100));
  }).then(() => promise_rejects_js(t, TypeError, fetch(url)));
}, 'Removing an iframe revokes its URLs');
</script>