Implement WebBluetooth getDescriptor[s]

third_party/WebKit/LayoutTests/bluetooth/getDescriptor/descriptor-found.html

Index: third_party/WebKit/LayoutTests/bluetooth/getDescriptor/descriptor-found.html
diff --git a/third_party/WebKit/LayoutTests/bluetooth/notifications/stop-without-starting.html b/third_party/WebKit/LayoutTests/bluetooth/getDescriptor/descriptor-found.html
similarity index 57%
copy from third_party/WebKit/LayoutTests/bluetooth/notifications/stop-without-starting.html
copy to third_party/WebKit/LayoutTests/bluetooth/getDescriptor/descriptor-found.html
index 7cbb02923277a8249db0a1bc80b9830129cd2025..de47e185f05b7319c3ad11798b7f40d03e9f0731 100644
--- a/third_party/WebKit/LayoutTests/bluetooth/notifications/stop-without-starting.html
+++ b/third_party/WebKit/LayoutTests/bluetooth/getDescriptor/descriptor-found.html
@@ -4,13 +4,20 @@
 <script src="../../resources/bluetooth/bluetooth-helpers.js"></script>
 <script>
 'use strict';
+

[ortuno, 2016/11/21 03:34:09]

Use the test generator e.g.

// script-tests/descriptor-found.js

'use strict';

promise_test(() => {
  return setBluetoothFakeAdapter('DisconnectingHealthThermometerAdapter')
    .then(() => requestDeviceWithKeyDown({filters: ['health_thermometer']})
    .then(device => device.gatt.connect())
    .then(gattServer => gattServer.getPrimaryService('health_thermometer'))
    .then(service => service.getCharacteristic('measurement_interval'))
    .then(characteristic => characteristic.CALLS([
       getDescriptor('valid_range')|
       getDescriptors('valid_range')[UUID]]))
    .then(descriptors => {
      // Convert to array if necessary.
      descriptors = [].concat(descriptors);
      descriptors.forEach(descriptor => {
        assert_equals(descriptor.uuid,
BluetoothUUID.getDescriptor('valid_range'));
      });
    });
}, 'Request for descriptor. Should return right descriptor.');

Because of CALLS([getDescriptor(...)| getDescriptors(...)[UUID]), generator.py
will generate two tests:

 getDescriptor/gen-descriptor-found.html
 getDescriptors/gen-descriptor-found-with-uuid.html

 promise_test(() => {
   return setBluetoothFakeAdapter('HeartRateAdapter')
     .then(() => requestDeviceWithKeyDown({
-      filters: [{services: ['heart_rate']}]}))
+      filters: [{services: ['heart_rate']}],
+      optionalServices: ['generic_access']}))
     .then(device => device.gatt.connect())
     .then(gattServer => gattServer.getPrimaryService('heart_rate'))
     .then(service => service.getCharacteristic('heart_rate_measurement'))
-    .then(characteristic => characteristic.stopNotifications());
-}, "Stop without starting.");
+    .then(characteristic => characteristic.getDescriptor(user_description.alias))
+    .then(descriptor => {
+      assert_equals(
+          descriptor.uuid, user_description.uuid,
+          'Descriptor UUID should be as requested.');
+    })
+}, 'Request for descriptor. Should return right descriptor');
 </script>