firefox-main/testing/web-platform/tests/speculation-rules/prerender/scroll-into-view-cross-origin-iframe.https.html

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Test Info:

<!DOCTYPE html>
<!--
Tests that focusing an element inside a cross origin iframe during prerendering
does not cancel the prerender and causes the parent frame to scroll, matching
same origin in process behavior.
-->
<title>Focus-triggered scroll in cross-origin iframe during prerendering</title>
<meta name="variant" content="?target_hint=_self">
<meta name="variant" content="?target_hint=_blank">
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="../resources/utils.js"></script>
<script src="resources/utils.js"></script>
<body>
<script>
setup(() => assertSpeculationRulesIsSupported());
function runTest(originKey, label) {
promise_test(async t => {
const uid = token();
const bc = new PrerenderChannel('test-channel', uid);
const gotMessage = new Promise(resolve => {
bc.addEventListener('message', e => {
resolve(e.data);
}, {once: true});
});
const origin = get_host_info()[originKey];
const url = `resources/scroll-into-view-cross-origin-iframe.html?uid=${uid}&target_hint=${getTargetHint()}&iframe_origin=${encodeURIComponent(origin)}`;
window.open(url, '_blank', 'noopener');
const result = await gotMessage;
assert_equals(result.error, undefined,
'Prerendered page should not report an error');
assert_true(result.iframeLoadedDuringPrerendering,
'Iframe should have loaded during prerendering');
assert_true(result.prerenderActivated,
'Page should have been activated from prerender (not cancelled by scroll)');
assert_true(result.activeElementUpdated,
'Active element has been updated');
assert_false(result.hasFocus,
'Iframe document should not have focus during prerendering');
assert_greater_than(result.iframeScrollTop, 0,
'Iframe should have scrolled internally during prerendering');
bc.close();
new PrerenderChannel('close', uid).postMessage('');
}, `Focusing an element in a ${label} iframe should scroll the parent during prerendering`);
}
runTest('HTTPS_ORIGIN', 'same-origin');
runTest('HTTPS_REMOTE_ORIGIN', 'cross-origin');
runTest('HTTPS_NOTSAMESITE_ORIGIN', 'cross-site');
</script>