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Test Info: Warnings

<!DOCTYPE html>
<link rel=author href="mailto:jarhar@chromium.org">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<dialog>dialog</dialog>
<details>details</details>
<select>
<option>one</option>
</select>
<script>
test(() => {
const dialog = document.querySelector('dialog');
assert_true(dialog.matches(':closed'),
':closed should match when the dialog is closed.');
assert_false(dialog.matches(':open'),
':open should not match when the dialog is closed.');
dialog.show();
assert_false(dialog.matches(':closed'),
':closed should not match after dialog.open().');
assert_true(dialog.matches(':open'),
':open should match after dialog.open().');
dialog.close();
dialog.showModal();
assert_false(dialog.matches(':closed'),
':closed should not match after dialog.showModal().');
assert_true(dialog.matches(':open'),
':open should match after dialog.showModal().');
dialog.close();
}, 'The dialog element should support :open and :closed.');
test(() => {
const details = document.querySelector('details');
assert_true(details.matches(':closed'),
':closed should match when the details is closed.');
assert_false(details.matches(':open'),
':open should not match when the details is closed.');
details.open = true;
assert_false(details.matches(':closed'),
':closed should not match when the details is open.');
assert_true(details.matches(':open'),
':open should match when the details is open.');
}, 'The details element should support :open and :closed.');
promise_test(async () => {
const select = document.querySelector('select');
assert_true(select.matches(':closed'),
':closed should match when the select is closed.');
assert_false(select.matches(':open'),
':open should not match when the select is closed.');
await test_driver.click(select);
await new Promise(requestAnimationFrame);
assert_false(select.matches(':closed'),
':closed should not match when the select is open.');
assert_true(select.matches(':open'),
':open should match when the select is open.');
}, 'The select element should support :open and :closed.');
</script>