<title>
  This tests the inheritance of COOP for navigations to about:blank.
</title>
<meta name=timeout content=long>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>

<p>Non-initial empty documents (about:blank) should inherit their
  cross-origin-opener-policy from the navigation's initiator top level document,
  if the initiator and its top level document are same-origin, or default
  (unsafe-none) otherwise.
</p>

<ol>
  <li>Create the opener popup with a given COOP <code>openerCOOP</code>.</li>
  <li>Add iframe to the opener popup that is either same-origin or
    cross-origin.
  </li>
  <li>Opener's iframe opens a new window, to a network document with <code>openeeCOOP</code>.</li>
  <li>Opener's iframe navigates the openee popup to about:blank.</li>
</ol>

<script>
const executor_path = "/common/dispatcher/executor.html?pipe=";
const same_origin = get_host_info().HTTPS_ORIGIN;
const cross_origin = get_host_info().HTTPS_REMOTE_ORIGIN;
const coop_same_origin_header =
  '|header(Cross-Origin-Opener-Policy,same-origin)';
const coep_require_corp_header =
  '|header(Cross-Origin-Embedder-Policy,require-corp)';
const coop_same_origin_plus_coep_header =
  coop_same_origin_header + coep_require_corp_header;
const coop_same_origin_allow_popups_header =
  '|header(Cross-Origin-Opener-Policy,same-origin-allow-popups)';
const coop_unsafe_none_header =
  '|header(Cross-Origin-Opener-Policy,unsafe-none)';

function navigateToAboutBlankTest(
  opener_COOP_header,
  iframe_origin,
  openee_COOP_header,
  openee_origin,
  iframe_header,
  expect_openee_closed
){
  return promise_test(async t => {
    const this_window_token = token();
    const opener_token = token();
    const openee_token = token();
    const iframe_token = token();

    const opener_url = same_origin + executor_path + opener_COOP_header +
        `&uuid=${opener_token}`;
    const openee_url = openee_origin + executor_path + openee_COOP_header +
        `&uuid=${openee_token}`;
    const iframe_url = iframe_origin + executor_path + iframe_header + `&uuid=${iframe_token}`;

    t.add_cleanup(() => {
      send(openee_token, "window.close()");
      send(opener_token, "window.close()");
    });

    // 1. Create the opener window.
    let opener_window_proxy = window.open(opener_url, opener_token);

    // 2. Create the iframe.
    send(opener_token, `
      iframe = document.createElement('iframe');
      iframe.src = "${iframe_url}";
      document.body.appendChild(iframe);
    `);

    // 3. The iframe opens its openee window.
    send(iframe_token, `
      window.openee = window.open(
          '${openee_url.replace(/,/g, '\\,')}',
          "${openee_token}"
      );
    `);

    // 4. Ensure the popup is fully loaded.
    send(openee_token, `send("${this_window_token}", "Ack");`);
    assert_equals(await receive(this_window_token), "Ack");

    // 5. The iframe navigates openee to about:blank.
    send(iframe_token, `
      window.openee_blank = window.open('about:blank', "${openee_token}");
      (async function() {
        const timeout = 2000;
        const retry_delay = 100;
        for(let i = 0; i * retry_delay < timeout; ++i) {
          // A try-catch block is used, because of same-origin policy,
          // preventing access to the document before committing about:blank.
          try {
            if (window.openee_blank.closed ||
                window.openee_blank.document.location.href == "about:blank") {
              send("${this_window_token}", "about:blank loaded");
              return;
            }
          } catch(e) {}
          await new Promise(resolve => setTimeout(resolve, retry_delay));
        }
        send("${this_window_token}", "about:blank not loaded");
      })()
    `);
    assert_equals(await receive(this_window_token), "about:blank loaded");

    // 6. Retrieve and check the results.
    send(iframe_token, `
      send("${this_window_token}", window.openee.closed);
    `);
    assert_equals(await receive(this_window_token), `${expect_openee_closed}`);
  }, `Navigate to about:blank from iframe with opener.top \
COOP: ${opener_COOP_header}, iframe origin: ${iframe_origin}, \
openee COOP: ${openee_COOP_header}, openee origin: ${openee_origin}.`);
};

// iframe same-origin with its top-level embedder:
// initial empty document and about:blank navigations initiated from the
// same-origin iframe will inherit the COOP from the iframe's top-level embedder.

// Since all navigations of openee are within same-origin pages with the
// same COOP value, there are no browsing context group switches.
navigateToAboutBlankTest(
  coop_same_origin_header,
  same_origin,
  coop_same_origin_header,
  same_origin,
  "",
  false
);

// Since all navigations of openee are within same-origin pages with the
// same COOP value, there are no browsing context group switches.
// Test with both COOP and COEP.
navigateToAboutBlankTest(
  coop_same_origin_plus_coep_header,
  same_origin,
  coop_same_origin_plus_coep_header,
  same_origin,
  coep_require_corp_header,
  false
);

// Since all navigations of openee are within same-origin pages with the
// same COOP value, there are no browsing context group switches.
navigateToAboutBlankTest(
  coop_same_origin_allow_popups_header,
  same_origin,
  coop_same_origin_allow_popups_header,
  same_origin,
  "",
  false
);

// The first openee navigation, from initial empty document to
// cross-origin will not switch the browsing context group, thanks to the
// same-origin-allow-popups behavior.
// The second openee navigation, to about:blank, will inherit from the
// iniatiator's, the iframe, top. Navigating from a COOP: unsafe-none page to
// a COOP: same-origin-allow-popups page causes a browsing context group
// switch.
navigateToAboutBlankTest(
  coop_same_origin_allow_popups_header,
  same_origin,
  coop_unsafe_none_header,
  cross_origin,
  "",
  true
);

// iframe cross-origin with its top-level embedder:
// initial empty document and about:blank navigations initiated from the
// cross-origin iframe will default COOP to unsafe-none.

// The navigation from the initial empty document and the cross_origin url
// does not cause a browsing context group switch
// (both have COOP: unsafe-none).
// The navigation from the cross-origin url to about:blank does not cause a
// browsing context group swich, about:blank defaulted its COOP value to
// unsafe-none.
navigateToAboutBlankTest(
  coop_same_origin_allow_popups_header,
  cross_origin,
  coop_unsafe_none_header,
  cross_origin,
  "",
  false
);
</script>
