partitioned-cookies-cross-site-subresource-to-same-site-redirect.tentative.https.html

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This WPT test may be referenced by the following Test IDs:
- /cookies/partitioned-cookies/partitioned-cookies-cross-site-subresource-to-same-site-redirect.tentative.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8"/>

<meta name="timeout" content="long">

<meta name="help" href="https://github.com/WICG/CHIPS#chips-cookies-having-independent-partitioned-state">

<title>Test partitioned cookies cross-site sub-resource redirect to same-site</title>

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

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

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

<script src="/cookies/resources/cookie-helper.sub.js"></script>

<script src="/cookies/partitioned-cookies/resources/test-helpers.js"></script>

<body>

<script>

  promise_test(async () => {

  assert_equals(document.cookie, "");

  const partitionedCookie = "ancestor=chain";

  const partitionedCookieAttributes =

      "; Secure; Path=/; SameSite=None; Partitioned";

  const partitionedCookieLine =

      partitionedCookie + partitionedCookieAttributes;

  // Add partitioned cookie to top-level site.

  document.cookie = partitionedCookieLine;

  assert_true(document.cookie.includes(partitionedCookie));

  //Create cross-site url for iframe.

  const cross_site_url = new URL(

    './resources/partitioned-cookies-empty-embed.html',

    get_host_info().HTTPS_NOTSAMESITE_ORIGIN + self.location.pathname);

  // Create cross-site iframe and wait for it to load.

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

  iframe.src = cross_site_url.href;

  document.body.appendChild(iframe);

  await new Promise(r => iframe.onload = r);

  // Confirm that the iframe is cross-site.

  let iframe_url = new URL(iframe.src);

  assert_not_equals(window.location.hostname, iframe_url.hostname);

  //Create same-site url for iframe.

  const same_site_url = new URL(

    './resources/partitioned-cookies-empty-embed.html',

    get_host_info().ORIGIN + self.location.pathname);

  // Redirect iframe by using redirect-and-echo-cookie-header.py to append the

  // http cookie header to the url query params for testing.

  iframe.src = `./resources/redirect-and-echo-cookie-header.py?location=${same_site_url.href}`;

  await new Promise(r => iframe.onload = r);

  iframe_url = new URL(iframe.src);

  assert_equals(window.location.hostname, iframe_url.hostname);

  // Confirm that the cookie was in http header of the redirect request

  assert_true(iframe.contentWindow.location.href

    .includes(partitionedCookie));

  assert_true(iframe.contentDocument.cookie

      .includes(partitionedCookie));

  erase_cookie_from_js("ancestor", "Secure; Path=/; SameSite=None; Partitioned");

    }, "Partitioned cookies are sent in embedded cross-site to same-site redirects");

</script>

</body>