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<!DOCTYPE html>
<html>
<head>
<meta name="variant" content="?pipe=header(Origin-Agent-Cluster,%3F0)">
<meta name="variant" content="?pipe=header(Origin-Agent-Cluster,%3F1)">
<title>Origin-Isolation after navigating about:blank.</title>
<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>
</head>
<body>
</body>
<script>
// Regression test for crbug.com/1399759. This is mainly based on
// external/wpt/html/infrastructure/urls/base-url/document-base-url-initiated-grand-parent.https.window.js
// but restricts itself to the exact error condition.
//
// This test is run in two variants which differ in the Origin-Agent-Cluster
// http header values, ?0 and ?1. The test should pass in either case, but the
// regression we're testing for involves inconsistent clustering decisions,
// which requires clustering to be enabled in the first place.
promise_test(async test => {
// Create a cross-origin iframe. Use the executor.html, so we can ask it
// to execute scripts for us.
const child_token = token();
const iframe = document.createElement("iframe");
iframe.src = get_host_info().HTTPS_REMOTE_ORIGIN +
`/common/dispatcher/executor.html?uuid=${child_token}`;
document.body.appendChild(iframe);
// The child creates a grand child in an iframe.
const reply_token = token();
send(child_token, `
const iframe = document.createElement("iframe");
iframe.src = "/common/blank.html";
iframe.onload = () => {
send("${reply_token}", "grand child loaded");
};
document.body.appendChild(iframe);
`);
assert_equals(await receive(reply_token), "grand child loaded");
const grandchild = iframe.contentWindow[0];
// Navigate the grand-child toward about:blank.
grandchild.location = "about:blank";
assert_equals(await receive(reply_token), "grand child loaded");
// This document and grandchild are same-origin, because about:blank
// inherits its origin from the initiator of the navigation, which is us.
// This access should not throw.
grandchild.document;
}, "Check the baseURL of an about:blank document cross-origin with its parent");
promise_test(async test => {
// This tests the same setup as above, but with about:srcdoc. Since one
// cannot just navigate to about:srcdoc, we'll have to include an extra
// step: Create an iframe with srcdoc attribute; navigate away; then
// navigate to about:srcdoc.
// srcdoc does not inherit the origin from the initiator - unlike
// about:blank - and so in this case the grandchild.document access should
// throw.
// Create a cross-origin iframe. Use the executor.html, so we can ask it
// to execute scripts for us.
const child_token = token();
const iframe = document.createElement("iframe");
iframe.src = get_host_info().HTTPS_REMOTE_ORIGIN +
`/common/dispatcher/executor.html?uuid=${child_token}`;
document.body.appendChild(iframe);
// The child creates a grand child in an iframe, using the srcdoc attribute.
const reply_token = token();
send(child_token, `
const iframe = document.createElement("iframe");
iframe.onload = () => {
send("${reply_token}", "grand child loaded");
};
iframe.srcdoc = "nothing interesting";
document.body.appendChild(iframe);
`);
assert_equals(await receive(reply_token), "grand child loaded");
const grandchild = iframe.contentWindow[0];
// Navigate the grand child toward a regular URL.
grandchild.location = get_host_info().HTTPS_REMOTE_ORIGIN + "/common/blank.html";
assert_equals(await receive(reply_token), "grand child loaded");
// Navigate the grand-child back, to about:srcdoc.
grandchild.location = "about:srcdoc";
assert_equals(await receive(reply_token), "grand child loaded");
// This document and grandchild are cross-origin. about:srcdoc does not
// inherits its origin from the initiator of the navigation. This access
// should throw:
assert_throws_dom("SecurityError", () => { grandchild.document; });
}, "Check that about:srcdoc navigation does not follow about:blank rules.");
</script>
</html>
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