fetch-cors-exposed-header-names.https.html

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This WPT test may be referenced by the following Test IDs:
- /service-workers/service-worker/fetch-cors-exposed-header-names.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<title>Service Worker: CORS-exposed header names should be transferred correctly</title>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<script src="/common/get-host-info.sub.js"></script>

<script src="resources/test-helpers.sub.js"></script>

<script>

promise_test(async function(t) {

    const SCOPE = 'resources/simple.html';

    const SCRIPT = 'resources/fetch-cors-exposed-header-names-worker.js';

    const host_info = get_host_info();

    const URL = get_host_info().HTTPS_REMOTE_ORIGIN +

      '/service-workers/service-worker/resources/simple.txt?pipe=' +

      'header(access-control-allow-origin,*)|' +

      'header(access-control-expose-headers,*)|' +

      'header(foo,bar)|' +

      'header(set-cookie,X)';

    const reg = await service_worker_unregister_and_register(t, SCRIPT, SCOPE);

    await wait_for_state(t, reg.installing, 'activated');

    const frame = await with_iframe(SCOPE);

    const response = await frame.contentWindow.fetch(URL);

    const headers = response.headers;

    assert_equals(headers.get('foo'), 'bar');

    assert_equals(headers.get('set-cookie'), null);

    assert_equals(headers.get('access-control-expose-headers'), '*');

  }, 'CORS-exposed header names for a response from sw');

</script>