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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="utils.js"></script>
<script>
// This file is loaded twice. First this is loaded as a page to trigger
// prerendering and then loaded as a prerendering page.
function runAsTriggerPage() {
assert_false(document.prerendering);
startPrerendering(location.href + '&prerendering=true');
// Close this window for cleanup after the prerendering page runs the test.
const bc = new PrerenderChannel('result');
bc.onmessage = e => window.close();
}
function runAsPrerenderingPage() {
assert_true(document.prerendering);
// Attempt to open a window during prerendering.
const win = window.open('empty.html', '_blank');
// Send the result to the test runner page.
const bc = new PrerenderChannel('result');
if (win) {
bc.postMessage('opened');
win.close();
} else {
bc.postMessage('failed to open');
}
}
if (new URLSearchParams(location.search).has('prerendering')) {
runAsPrerenderingPage();
} else {
runAsTriggerPage();
}
</script>