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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="utils.js"></script>
<title>Fenced frame content to report the value of window.top</title>
<body>
<script>
async function init() { // Needed in order to use top-level await.
// This file is meant to run in a <fencedframe>. It reports back to the
// outermost page whether or not the value of `window.top` was correct for:
// 1.) Top-level fenced frames
// 2.) Nested iframes inside a fenced frame
// 3.) Nested fenced frames
const url = new URL(location.href);
const [window_top_key, window_top_ack_key, nested] = parseKeylist();
// Report whether or not `window.top` was correct.
let pass_string = "";
if (nested == "nested")
pass_string = "pass: fenced frame > fenced frame";
else
pass_string = "pass: fenced frame";
let result = (window.top == window) ? pass_string : "fail";
writeValueToServer(window_top_key, result);
// If this page is a nested fenced frame, all we need to do is report the
// top-level value.
if (nested == "nested")
return;
// Wait for ACK, so we know that the outer page has read the last value from
// the `window_top_key` stash and we can write to it again.
await nextValueFromServer(window_top_ack_key);
// Now test `window.top` inside an iframe.
const iframe = document.createElement('iframe');
iframe.src = "dummy.html";
const load_promise = new Promise((resolve, reject) => {
iframe.onload = resolve;
iframe.onerror = reject;
});
document.body.append(iframe);
await load_promise;
// Report whether or not the subframe's `window.top` was correct.
result = (iframe.contentWindow.top == window) ?
"pass: fenced frame > iframe" : "fail";
writeValueToServer(window_top_key, result);
// Wait for ACK, so we know that the outer page has read the last value from
// the `window_top_key` stash and we can write to it again.
await nextValueFromServer(window_top_ack_key);
attachFencedFrame(generateURL("window-top-inner.html",
[window_top_key, window_top_ack_key, "nested"]));
}
init();
</script>
</body>
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