servo/tests/wpt/web-platform-tests/web-locks/query-empty.tentative.https.html

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HTML

<!DOCTYPE html>
<meta charset=utf-8>
<title>Web Locks API: navigator.locks.query method - no locks held</title>
<link rel=help href="https://github.com/inexorabletash/web-locks">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/helpers.js"></script>
<script>
'use strict';
promise_test(async t => {
const state = await navigator.locks.query();
assert_own_property(state, 'pending', 'State has `pending` property');
assert_true(Array.isArray(state.pending),
'State `pending` property is an array');
assert_array_equals(state.pending, [], 'Pending array is empty');
assert_own_property(state, 'held', 'State has `held` property');
assert_true(Array.isArray(state.held), 'State `held` property is an array');
assert_array_equals(state.held, [], 'Held array is empty');
}, 'query() returns dictionary with empty arrays when no locks are held');
</script>