shared-storage/shared-storage-writable-img-request-in-data-url.tentative.https.sub.html

<!doctype html>
<body>
  <script src=/resources/testharness.js></script>
  <script src=/resources/testharnessreport.js></script>
  <script src=/common/utils.js></script>
  <script src=/fenced-frame/resources/utils.js></script>
  <script src=/shared-storage/resources/util.js></script>
  <script>
    'use strict';
    const origin = window.location.origin;
    const rawSetHeader = 'set;key=hello;value=world';
    const setHeader = encodeURIComponent(rawSetHeader);

    promise_test(async t => {
      let frame = document.createElement('iframe');
      const promise = new Promise((resolve, reject) => {
        window.addEventListener('message', async function handler(evt) {
          if (evt.source === frame.contentWindow &&
              evt.data.sharedStorageWritableLoadStatus) {
            document.body.removeChild(frame);
            window.removeEventListener('message', handler);
            resolve(evt.data.sharedStorageWritableLoadStatus);
          }
        });
        window.addEventListener('error', (error) => {
          reject(error);
        });
      });

      const imageUrl =
        `${origin}\\/shared-storage\\/resources\\/shared-storage-writable-`
        + `pixel-write.png?write=${setHeader}`;
      const innerCode = `
let parentOrOpener = window.opener || window.parent;
let image = document.createElement('img');
window.addEventListener('load', async (evt) => {
  parentOrOpener.postMessage({sharedStorageWritableLoadStatus:
                              'loaded'}, '*');
});
window.addEventListener('error', (error) => {
  parentOrOpener.postMessage({sharedStorageWritableLoadStatus: error.message},
                             '*');
});
image.src = '${imageUrl}';
image.sharedStorageWritable = true;
document.body.appendChild(image);
`;

      const dataURL = 'data:text/html;base64,'
        + btoa(unescape('%3Chtml%3E%3Cbody%3E%3Cscript%3E'
                        + encodeURIComponent(innerCode) +
                        '%3C%2Fscript%3E%3C%2Fbody%3E%3C%2Fhtml%3E'));
      frame.src = dataURL;
      document.body.appendChild(frame);

      const result = await promise;
      assert_equals(result, "loaded");
      await verifyKeyNotFoundForOrigin('hello', origin);

    }, 'shared storage iframe request disallowed in opaque origin from data URL');
  </script>
</body>