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chromium/third_party/blink/web_tests/wpt_internal/bluetooth/requestLEScan/radio-not-present.https.https.html 

<!DOCTYPE html>
<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>
<script src="/bluetooth/resources/bluetooth-test.js"></script>
<script src="/bluetooth/resources/bluetooth-fake-devices.js"></script>
<script>
'use strict';
const test_desc =
    'requestLEScan reject with NotFoundError if there is no BT radio present.';
const expected =
    new DOMException('Bluetooth adapter not available.', 'NotFoundError');

bluetooth_test(
    () => navigator.bluetooth.test.simulateCentral({state: 'absent'})
              .then(
                  () => assert_promise_rejects_with_message(
                      requestLEScanWithTrustedClick(
                          {acceptAllAdvertisements: true}),
                      expected, 'Bluetooth adapter is not present.')),
    test_desc);
</script>