<!DOCTYPE html>
<html>
<body>
<p>This tests opening a new window during beforeunload event. The page load should succeed.</p>
<div id="log">FAIL</div>
<script>

if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
    testRunner.setCanOpenWindows()
    testRunner.setPopupBlockingEnabled(false);
    testRunner.setCloseRemainingWindowsWhenComplete(true);
}

var opened;
const frame = document.createElement('iframe');
document.body.appendChild(frame);
frame.contentDocument.open();
frame.contentDocument.write(`<script> window.onbeforeunload = () => top.opened = window.open('resources/message-opener.html'); </` + `script>`);
frame.contentDocument.close();

frame.src = 'about:blank';

window.onmessage = (event) => {
    if (event.data == 'load') {
        document.getElementById('log').textContent = 'PASS';
        endTest();
    }
}

function endTest() {
    if (opened)
        opened.close();
    if (window.testRunner)
        testRunner.notifyDone();
}

setTimeout(endTest, 1000);

</script>
</body>
</html>