chromium/src/third_party/blink/web_tests/wpt_internal/bluetooth/script-tests/characteristic/descriptor-device-disconnects-before.js

'use strict';
const test_desc = 'Device disconnects before FUNCTION_NAME. ' +
    'Reject with NetworkError.';
let device, characteristic, fake_peripheral;

function createDOMException(func) {
  return new DOMException(
      `Failed to execute '${func}' on 'BluetoothRemoteGATTCharacteristic': ` +
      `GATT Server is disconnected. Cannot retrieve descriptors. (Re)connect ` +
      `first with \`device.gatt.connect\`.`,
      'NetworkError');
}

bluetooth_test(() => getMeasurementIntervalCharacteristic()
    .then(_ =>  ({device, characteristic, fake_peripheral} = _))
    .then(() => simulateGATTDisconnectionAndWait(device, fake_peripheral))
    .then(() => assert_promise_rejects_with_message(
        characteristic.CALLS([
          getDescriptor(user_description.name) |
          getDescriptors(user_description.name)[UUID] |
          getDescriptors()
        ]),
        createDOMException('FUNCTION_NAME'))),
    test_desc);