document-base-url-changes-about-srcdoc.https.window.js

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This test has a WPT meta file that expects 2 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /html/infrastructure/urls/terminology-0/document-base-url-changes-about-srcdoc.https.window.html - WPT Dashboard Interop Dashboard

// Load about:srcdoc in a iframe. Check the document.baseURI is still

// correct after the parent changes its base URL..

const runTest = (description, sandbox_flags) => {

  promise_test(async test => {

    // Create child.

    const iframe = document.createElement("iframe");

    if (sandbox_flags !== null)

      iframe.sandbox = sandbox_flags;

    iframe.srcdoc = `

      <script>

        addEventListener('message', (event) => {

          if (event.data == 'report baseURI')

            event.source.postMessage(document.baseURI, event.origin);

});

        parent.postMessage('loaded', '*');

      </scr`+`ipt>

`;

    const child_loaded = new Promise(r => onmessage = e => r(e.data));

    document.body.appendChild(iframe);

    assert_equals(await child_loaded, "loaded");

    // Verify child's baseURI matches parent.

    const original_parent_baseURI = document.baseURI;

    const child_base_uri = new Promise(r => onmessage = e => r(e.data));

    frames[0].postMessage("report baseURI", "*");

    assert_equals(await child_base_uri, original_parent_baseURI);

    // Parent changes its baseURI, requests child to report.

    const base_element = document.createElement("base");

    base_element.href = "https://foo.com";

    document.head.appendChild(base_element);

    assert_not_equals(document.baseURI, original_parent_baseURI,

        "parent baseURI failed to change.");

    // Verify child's baseURI didn't change.

    const child_base_uri2 = new Promise(r => onmessage = e => r(e.data));

    frames[0].postMessage("report baseURI", "*");

    assert_equals(await child_base_uri2, original_parent_baseURI);

    // Cleanup.

    base_element.remove();

  }, description);

runTest("non-sandboxed srcdoc - parent changes baseURI",null);

runTest("sandboxed srcdoc - parent changes baseURI", "allow-scripts");