chromium/third_party/blink/web_tests/wpt_internal/bluetooth/requestLEScan/multiple-scan.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 src="/bluetooth/resources/bluetooth-scanning-helpers.js"></script>
<script>
'use strict';
const test_desc = 'Multiple requestLEScan receive a scan result.';

let scan;
let scan2;

bluetooth_test(async (t) => {
  const fake_central =
      await navigator.bluetooth.test.simulateCentral({state: 'powered-on'});

  await callWithTrustedClick(async () => {
    scan = await navigator.bluetooth.requestLEScan(
        {acceptAllAdvertisements: true});
    scan2 = await navigator.bluetooth.requestLEScan(
        {acceptAllAdvertisements: true});
  });

  assert_true(scan.active);
  assert_true(scan2.active);
  scan2.stop()
  assert_true(scan.active);
  assert_false(scan2.active);

  // We should still get an event because we called requestLEScan twice.
  const eventWatcher =
      new EventWatcher(t, navigator.bluetooth, ['advertisementreceived']);

  let promise = eventWatcher.wait_for('advertisementreceived').then(e => {
    verifyBluetoothAdvertisingEvent(e);
  });
  fake_central.simulateAdvertisementReceived(scanResult);
  return promise;
}, test_desc);
</script>