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Test Info:

<!DOCTYPE html>
<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="../resources/utils.js"></script>
<script src="resources/utils.js"></script>
setup(() => assertSpeculationRulesIsSupported());
function runTest(test_file, expectation, description) {
promise_test(async t => {
const uid = token();
// Run test in a new window for test isolation.`${test_file}?uid=${uid}`, '_blank', 'noopener');
// Wait until the prerendered page sends the result.
const bc = new PrerenderChannel('result', uid);
t.add_cleanup(() => {
new PrerenderChannel('close', uid).postMessage('close');
const result = await new Promise(r => bc.addEventListener('message', e => r(;
assert_equals(result, expectation);
}, description);
// Test that a page opens a window during prerendering.
'failed to open',
' should fail during prerendering');
// Test that a page opens a window in the prerenderingchange event.
' should succeed in the prerenderingchange event');