third-party-cookies-cross-site-embedder.html

<!DOCTYPE html>
<meta charset="utf-8"/>
<meta name="timeout" content="long">
<title>Window embedding a cross-site embed</title>
<script src="/resources/testharness.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/cookies/resources/cookie-helper.sub.js"></script>
<script src="/cookies/third-party-cookies/resources/test-helpers.js"></script>

<body>
<script>

let origin;

// Test that parent window passed its origin in the URL parameters correctly.
test(() => {
  assert_true(window.location.search.startsWith("?origin="));
  origin = decodeURIComponent(window.location.search.slice(
      window.location.search.indexOf("?origin=") + 8));
}, "Cross-site window opened correctly");

// Cookies set by the parent window in a 1P context.
const cookieNames = ["1P_http", "1P_dom"];
if (window.cookieStore) {
  cookieNames.push("1P_cs");
}

// Third-party cookies are blocked by default.
assertThirdPartyHttpCookies({
  desc: "3P fetch",
  origin,
  cookieNames,
  expectsCookie: false,
});

// Create a cross-site <iframe> which embeds the cookies' origin into this
// page.
const iframe = document.createElement("iframe");
const url = new URL(
    "/cookies/third-party-cookies/resources/" +
        "third-party-cookies-cross-site-embed.html",
    origin);
iframe.src = String(url);
document.body.appendChild(iframe);

fetch_tests_from_window(iframe.contentWindow);

</script>
</body>

chromium/third_party/blink/web_tests/external/wpt/cookies/third-party-cookies/resources/third-party-cookies-cross-site-embedder.html