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Test Info:

<!DOCTYPE html>
<meta charset="utf-8" />
<title>Popover beforetoggle event opening new popovers</title>
<link rel="author" href="mailto:masonf@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="resources/popover-utils.js"></script>
<div popover id=p1>Popover 1
<div popover id=p2>Popover 2
<div popover id=p3>Popover 3</div>
</div>
</div>
<div id=outside>Outside</div>
<dialog id=dialog>Dialog</dialog>
<script>
function getSignal(t) {
const controller = new AbortController();
t.add_cleanup(() => controller.abort());
return controller.signal;
}
test((t) => {
p1.showPopover();
p1.addEventListener('beforetoggle',() => p2.showPopover(),{signal: getSignal(t)});
p1.hidePopover(); // Potential crash here
assert_false(p1.matches(':popover-open'));
assert_false(p2.matches(':popover-open'));
},'Open popover from closing beforetoggle event');
test((t) => {
p1.showPopover();
p1.addEventListener('beforetoggle',() => p2.showPopover(),{signal: getSignal(t)});
p2.addEventListener('beforetoggle',() => p3.showPopover(),{signal: getSignal(t)});
p1.hidePopover(); // Potential crash here
assert_false(p1.matches(':popover-open'));
assert_false(p2.matches(':popover-open'));
assert_false(p3.matches(':popover-open'));
},'Open double-nested popovers from closing beforetoggle event');
test(t => {
p1.showPopover();
p1.addEventListener('beforetoggle',() => p2.showPopover(),{signal: getSignal(t)});
p2.addEventListener('beforetoggle',() => p3.showPopover(),{signal: getSignal(t)});
dialog.showModal(); // Potential crash here
assert_false(p1.matches(':popover-open'));
assert_false(p2.matches(':popover-open'));
assert_false(p3.matches(':popover-open'));
dialog.close();
},'Open double-nested popovers from closing beforetoggle event, dialog open');
promise_test(async t => {
p1.showPopover();
p1.addEventListener('beforetoggle',() => p2.showPopover(),{signal: getSignal(t)});
p2.addEventListener('beforetoggle',() => p3.showPopover(),{signal: getSignal(t)});
await clickOn(outside); // Potential crash here
assert_false(p1.matches(':popover-open'));
assert_false(p2.matches(':popover-open'));
assert_false(p3.matches(':popover-open'));
},'Open double-nested popovers from closing beforetoggle event, light dismiss');
</script>