<!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-helpers.js"></script>
<script>
'use strict';
const test_desc = 'If a site disconnects from a device while the platform is ' +
    'disconnecting that device, only one gattserverdisconnected event should ' +
    'fire.';
let device, fake_peripheral;
let num_events = 0;

bluetooth_test(() => getConnectedHealthThermometerDevice()
  .then(_ => ({device, fake_peripheral} = _))
  // 1. Listen for disconnections.
  .then(() =>
      device.addEventListener('gattserverdisconnected', () => num_events++))
  // 2. Disconnect several times.
  .then(() => Promise.all([
    eventPromise(device, 'gattserverdisconnected'),
    fake_peripheral.simulateGATTDisconnection(),
    device.gatt.disconnect(),
    device.gatt.disconnect(),
  ]))
  // 3. Wait to catch disconnect events.
  .then(() => new Promise(resolve => step_timeout(resolve, 50)))
  // 4. Ensure there is exactly 1 disconnection recorded.
  .then(() => assert_equals(num_events, 1)),
  test_desc);
</script>