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chromium/third_party/blink/web_tests/wpt_internal/bluetooth/descriptor/readValue/gen-io-op-device-disconnects-during-success.https.html 

<!-- Generated by //third_party/blink/web_tests/bluetooth/generate.py -->
<!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 src="/common/gc.js"></script>
<script>
'use strict';
bluetooth_test(
    () => {
      let val = new Uint8Array([1]);
      return setBluetoothFakeAdapter('DisconnectingHealthThermometerAdapter')
          .then(() => requestDeviceWithTrustedClick({
                  filters: [{services: ['health_thermometer']}],
                  optionalServices: [request_disconnection_service_uuid]
                }))
          .then(device => device.gatt.connect())
          .then(gattServer => {
            return gattServer.getPrimaryService('health_thermometer')
                .then(ht => ht.getCharacteristic('measurement_interval'))
                .then(
                    characteristic =>
                        characteristic.getDescriptor(user_description.name))
                .then(d => user_description = d)
                .then(() => get_request_disconnection(gattServer))
                .then(requestDisconnection => {
                  requestDisconnection();
                  return assert_promise_rejects_with_message(
                      user_description.readValue(),
                      new DOMException(
                        'GATT Server is disconnected. Cannot perform GATT operations. ' +
                        '(Re)connect first with `device.gatt.connect`.',
                          'NetworkError'));
                });
          });
    },
    'Device disconnects during a readValue call that succeeds. ' +
        'Reject with NetworkError.');

</script>