mozilla-release/testing/web-platform/tests/bluetooth/characteristic/service-same-from-2-characteristics.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-helpers.js"></script>
<script>
'use strict';
const test_desc = 'Same parent service returned from multiple characteristics.';

bluetooth_test(() => getHealthThermometerService()
    .then(({service}) => Promise.all([
      service.getCharacteristic('measurement_interval'),
      service.getCharacteristic('temperature_measurement')
    ]))
    .then(characteristics =>
        assert_equals(characteristics[0].service, characteristics[1].service)),
    test_desc);
</script>