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<!DOCTYPE html>
<title>Service Worker: update() should resolve a ServiceWorkerRegistration</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<body>
<script>
promise_test(async function(t) {
const script = './resources/empty.js';
const scope = './resources/empty.html?update-result';
let reg = await navigator.serviceWorker.register(script, { scope });
t.add_cleanup(async _ => await reg.unregister());
await wait_for_state(t, reg.installing, 'activated');
let result = await reg.update();
assert_true(result instanceof ServiceWorkerRegistration,
'update() should resolve a ServiceWorkerRegistration');
}, 'ServiceWorkerRegistration.update() should resolve a registration object');
</script>
</body>
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