tor-browser

navigate-top-to-aboutblank.https.html (6130B)

---

<title>
 This tests the inheritance of COOP for navigations of the top document 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>
<script src="/html/cross-origin-opener-policy/resources/common.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 (to
 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 opens a new window, to a network document with the same origin and
   COOP value as opener.</li>
 <li>Opener's iframe navigates its parent frame (opener) to about:blank.</li>
 <li>Verify the openee still has access to its opener.</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 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(
 COOP_header,
 iframe_origin,
 expect_opener_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 + COOP_header +
       `&uuid=${opener_token}`;
   const openee_url = same_origin + executor_path + COOP_header +
       `&uuid=${openee_token}`;
   const iframe_url = iframe_origin + executor_path + `&uuid=${iframe_token}`;

   t.add_cleanup(() => {
     send(opener_token, "window.close()");
     send(openee_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 opener opens openee window.
   send(opener_token, `
     window.openee = window.open(
         '${openee_url.replace(/,/g, '\\,')}'
     );
   `);

   // 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 its top-level document to about:blank. It needs
   // to receive a user action as it may be cross-origin and it navigates top
   // to a cross-origin document.
   // https://github.com/WICG/interventions/issues/16
   send(iframe_token, addScriptAndTriggerOnload(
     "/resources/testdriver.js",
     `${addScriptAndTriggerOnload("/resources/testdriver-vendor.js",
       `
       test_driver.bless('navigate top to about:blank', () => {
         open("about:blank", "_top");
       });
     `)}
   `));

   // 6. Ensure opener is fully loaded and then retrieve the results.
   send(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,
         // which may prevent the access to the opener if its origin changed,
         // after a navigation to about:blank from the cross origin iframe.
         try {
           if (
               window.opener === null ||
               window.opener.closed ||
               window.opener.document.location.href == "about:blank") {
             send("${this_window_token}", "about:blank loaded");
             return;
           }
         } catch(e) {
           // The exception is thrown when about:blank is loaded and is
           // cross-origin with openee.
           send("${this_window_token}", "about:blank loaded");
           return;
         }
         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");

   // 7. Retrieve and check the results.
   send(openee_token, `
     send(
       "${this_window_token}",
       window.opener === null || window.opener.closed);
   `);

   assert_equals(await receive(this_window_token), `${expect_opener_closed}`);
 }, `Navigate top to about:blank from iframe with \
opener COOP: ${COOP_header}, iframe origin: ${iframe_origin}`);
};

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

// Opener's navigation to about:blank stays in the same browsing context group.
navigateToAboutBlankTest(
 coop_same_origin_header,
 same_origin,
 false
);

// 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.

// Opener's navigation to about:blank doesn't inherit COOP, leading to a
// browsing context group switch.
navigateToAboutBlankTest(
 coop_same_origin_header,
 cross_origin,
 true
);

// Same origin allow popups allows the navigation of top to the cross-origin
// about:blank (origin inherited from the iframe) page, which does not have COOP
// (initiator is a cross origin iframe).
navigateToAboutBlankTest(
 coop_same_origin_allow_popups_header,
 cross_origin,
 false
);
</script>