partitioned-popins.cookies-window.html

<!doctype html>
<meta charset="utf-8">
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script>
(async function() {
  test_driver.set_test_context(window.opener);

  // Step 3 (partitioned-popins/partitioned-popins.cookies.tentative.sub.https.window.js)
  const id = (new URLSearchParams(window.location.search)).get("id");
  document.cookie = "first-party-strict=" + id + "; SameSite=Strict; Secure";
  document.cookie = "first-party-lax=" + id + "; SameSite=Lax; Secure";
  document.cookie = "first-party-none=" + id + "; SameSite=None; Secure";
  window.opener.postMessage({type: "window-set", message: "Set first-party data"}, "*");
  window.close();
})();
</script>

chromium/third_party/blink/web_tests/external/wpt/partitioned-popins/resources/partitioned-popins.cookies-window.html