partitioned-cookies-samesite-attributes-embed.html

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<!DOCTYPE html>

<meta charset="utf-8"/>

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

<title>Partitioned cookie SameSite test site embedded in a cross-site context</title>

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

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

<script src="/resources/testdriver-vendor.js"></script>

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

<body>

<script>

promise_test(async t => {

  test_driver.set_test_context(window.top);

  t.add_cleanup(test_driver.delete_all_cookies);

  document.cookie = "testUnset=0; Secure; Partitioned;";

  document.cookie = "testStrict=0; Secure; Partitioned; SameSite=Strict;";

  document.cookie = "testLax=0; Secure; Partitioned; SameSite=Lax;";

  let cookies = await test_driver.get_all_cookies();

  assert_equals(cookies.length, 0);

  document.cookie = "testNone=0; Secure; Partitioned; SameSite=None;";

  cookies = await test_driver.get_all_cookies();

  assert_equals(cookies.length, 1);

  const cookie = cookies[0];

  assert_equals(cookie["name"], "testNone");

  assert_equals(cookie["value"], "0");

  assert_equals(cookie["sameSite"], "None");

}, "In embedded cross-site contexts, partitioned cookies can only be set with explicit SameSite=None");

</script>

</body>