document-base-url-changes-about-srcdoc-2.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:
- /html/infrastructure/urls/base-url/document-base-url-changes-about-srcdoc-2.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/get-host-info.sub.js"></script>

<iframe src='about:blank'></iframe>

<script>

// If document.open's behavior is modified to remove the url-rewriting behavior,

// then this test can be deleted (https://github.com/whatwg/html/issues/3989).

setup({ explicit_done: true });

// This function is called by directly by the child iframe (above), with the

// child iframe's document. The child iframe's document contains an about:srcdoc iframe.

window.start = childDocument => {

  const grandchildDocument =

    childDocument.getElementById('foo').contentDocument;

  test(() => {

    assert_equals(childDocument.URL, 'about:blank',

      'Child document starting URL');

    assert_equals(grandchildDocument.URL, 'about:srcdoc',

      'Grandchild document starting URL');

    const originalChildBaseURL = childDocument.baseURI;

    grandchildDocument.open("", "");

    // Verify that the document.open() trick worked: the grandchild should now

    // have the same url as the child, and have inherited the child's base url.

    assert_equals(grandchildDocument.URL, 'about:blank',

      'Grandchild document after document.open() trick');

    assert_equals(grandchildDocument.baseURI, originalChildBaseURL,

      'Grandchild base URL must match child base URL');

    // Give child a new base URL.

    const baseElement = childDocument.createElement('base');

    baseElement.href = get_host_info().REMOTE_ORIGIN;

    childDocument.head.append(baseElement);

    // Verify that changing the child's base url succeeded and did not affect

    // the grandchild's base url.

    const newChildBaseURL = childDocument.baseURI;

    assert_equals(grandchildDocument.URL, 'about:blank',

      'Grandchild document after child gets new base URL');

    assert_not_equals(newChildBaseURL, originalChildBaseURL,

      'Child base URL must change');

    assert_equals(grandchildDocument.baseURI, originalChildBaseURL,

      'Grandchild base URL must not change');

});

  done();

};

let subframe_doc = document.querySelector('iframe').contentDocument;

subframe_doc.body.innerHTML = '<iframe srcdoc="foo" id="foo"></iframe>';

promise_test(async t => {

  const grandchildIframe = subframe_doc.querySelector('iframe');

  await new Promise(resolve => {

    grandchildIframe.onload = resolve;

});

  assert_equals(grandchildIframe.contentDocument.URL, 'about:srcdoc');

  let script = subframe_doc.createElement('script');

  script.innerHTML = 'parent.start(document);';

  subframe_doc.body.appendChild(script);

}, "wrapper promise test for timeout.");

</script>