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Test Info:

<!DOCTYPE html>
<html>
<head>
<title>Embedded Enforcement: blocked iframes are cross-origin.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="support/testharness-helper.sub.js"></script>
</head>
<body>
<script>
let SecurityError = 18;
promise_test(async () => {
let iframe = document.createElement("iframe");
let loaded = new Promise(r => iframe.onload = r);
iframe.csp = "script-src 'none'";
iframe.src = getCrossOrigin() + "common/blank.html";
document.body.appendChild(iframe);
await loaded;
assert_throws_dom(SecurityError, () => iframe.contentWindow.document);
}, "Document blocked by embedded enforcement and its parent are cross-origin");
promise_test(async () => {
// Create an iframe that would have been same-origin with the blocked iframe
// if it wasn't blocked.
let helper_frame = document.createElement("iframe");
let loaded_helper = new Promise(r => helper_frame.onload = r);
helper_frame.src = getCrossOrigin() +
"content-security-policy/embedded-enforcement/support/executor.html"
document.body.appendChild(helper_frame);
await loaded_helper;
let reply = new Promise(r => window.onmessage = r);
helper_frame.contentWindow.postMessage(`
let test = function() {
if (parent.frames.length != 2)
return "Error: Wrong number of iframes";
if (parent.frames[1] != window)
return "Error: Wrong frame index for the second iframe";
// Try to access frames[0] from frames[1]. This must fail.
try {
parent.frames[0].contentWindow;
return "Error: The error page appears same-origin";
} catch(dom_exception) {
return dom_exception.code;
}
};
parent.postMessage(test(), '*');
`, '*');
assert_equals((await reply).data, SecurityError);
}, "Two same-origin iframes must appear as cross-origin when one is blocked");
</script>
</body>
</html>