Implement WebBluetooth getDescriptor[s]

device/bluetooth/test/mock_bluetooth_gatt_characteristic.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "device/bluetooth/test/mock_bluetooth_gatt_characteristic.h"
-
+#include "device/bluetooth/test/mock_bluetooth_gatt_descriptor.h"
 #include "device/bluetooth/test/mock_bluetooth_gatt_service.h"
 
 using testing::Return;
 using testing::ReturnRefOfCopy;
 using testing::_;
 
 namespace device {
 
 MockBluetoothGattCharacteristic::MockBluetoothGattCharacteristic(
     MockBluetoothGattService* service,
@@ skipping 11 matching lines @@
   ON_CALL(*this, GetProperties()).WillByDefault(Return(properties));
   ON_CALL(*this, GetPermissions()).WillByDefault(Return(permissions));
   ON_CALL(*this, IsNotifying()).WillByDefault(Return(false));
   ON_CALL(*this, GetDescriptors())
       .WillByDefault(Return(std::vector<BluetoothRemoteGattDescriptor*>()));
 }
 
 MockBluetoothGattCharacteristic::~MockBluetoothGattCharacteristic() {
 }
 
+void MockBluetoothGattCharacteristic::AddMockDescriptor(
+    std::unique_ptr<MockBluetoothGattDescriptor> mock_descriptor) {
+  mock_descriptors_.push_back(std::move(mock_descriptor));
+}
+
+std::vector<BluetoothRemoteGattDescriptor*>
+MockBluetoothGattCharacteristic::GetMockDescriptors() const {
+  std::vector<BluetoothRemoteGattDescriptor*> descriptors;
+  for (auto& descriptor : mock_descriptors_) {
+    descriptors.push_back(descriptor.get());
+  }
+  return descriptors;
+}
+
+BluetoothRemoteGattDescriptor*
+MockBluetoothGattCharacteristic::GetMockDescriptor(
+    const std::string& identifier) const {
+  for (auto& descriptor : mock_descriptors_) {
+    if (descriptor->GetIdentifier() == identifier) {
+      return descriptor.get();
+    }
+  }
+  return nullptr;
+}
+
 }  // namespace device