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Test Info:

<!DOCTYPE html>
<title>Service Worker: Service-Worker header</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="resources/test-helpers.sub.js"></script>
<script>
promise_test(async t => {
const script = 'resources/service-worker-header.py'
+ '?header&import=service-worker-header.py?no-header';
const scope = 'resources/service-worker-header';
const expected_url = normalizeURL(script);
const registration =
await service_worker_unregister_and_register(t, script, scope);
t.add_cleanup(() => registration.unregister());
assert_true(registration instanceof ServiceWorkerRegistration);
await wait_for_state(t, registration.installing, 'activated');
await registration.update();
}, 'A request to fetch service worker main script should have Service-Worker '
+ 'header and imported scripts should not have one');
</script>