partitioned-cookies-same-site-subresource-to-cross-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-same-site-subresource-to-cross-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 same-site sub-resource redirect to cross-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 () => {

  //Add partitioned cookie to top-level site.

  assert_equals(document.cookie, "");

  const partitionedCookie = "ancestor=chain";

  const partitionedCookieAttributes =

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

  const partitionedCookieLine =

      partitionedCookie + partitionedCookieAttributes;

  document.cookie = partitionedCookieLine;

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

  const resourceDir = "./resources/";

  const embedUrl = new URL(resourceDir +

    "ancestor-chain-same-site-to-cross-site-embed.html",

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

  const redirectUrl = new URL(resourceDir +

    "redirect-and-echo-cookie-header.py?location=" + embedUrl,

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

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

  iframe.src = new URL(resourceDir + "ancestor-chain-empty-embed.html",

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

  document.body.appendChild(iframe);

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

  // Confirm that the iframe is same-site to the top-level site.

  let iframeUrl = new URL(iframe.src);

  let iframeHost = iframeUrl.hostname;

  assert_equals(window.location.hostname, iframeHost);

  iframe.src = redirectUrl;

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

  await fetch_tests_from_window(iframe.contentWindow);

  // Confirm that the iframe is cross-site to the top-level site.

  iframeUrl = new URL(iframe.src);

  iframeHost = iframeUrl.hostname;

  assert_not_equals(window.location.hostname, iframeHost);

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

}, "Partitioned cookies are not sent in embedded same-site to cross-site redirects");

</script>

</body>