bluetooth: Save characteristic value when notification arrives

device/bluetooth/test/test_bluetooth_adapter_observer.cc

 // Copyright 2015 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/test_bluetooth_adapter_observer.h"
 
 #include <string>
 #include <vector>
 
 #include "base/message_loop/message_loop.h"
@@ skipping 42 matching lines @@
   gatt_characteristic_removed_count_ = 0;
   gatt_characteristic_value_changed_count_ = 0;
   gatt_descriptor_added_count_ = 0;
   gatt_descriptor_removed_count_ = 0;
   gatt_descriptor_value_changed_count_ = 0;
   last_gatt_service_id_.clear();
   last_gatt_service_uuid_ = BluetoothUUID();
   last_gatt_characteristic_id_.clear();
   last_gatt_characteristic_uuid_ = BluetoothUUID();
   last_changed_characteristic_value_.clear();
+  previous_characteristic_value_changed_values_.clear();
   last_gatt_descriptor_id_.clear();
   last_gatt_descriptor_uuid_ = BluetoothUUID();
   last_changed_descriptor_value_.clear();
 }
 
 void TestBluetoothAdapterObserver::AdapterPresentChanged(
     BluetoothAdapter* adapter,
     bool present) {
   EXPECT_EQ(adapter_.get(), adapter);
 
@@ skipping 222 matching lines @@
 void TestBluetoothAdapterObserver::GattCharacteristicValueChanged(
     BluetoothAdapter* adapter,
     BluetoothRemoteGattCharacteristic* characteristic,
     const std::vector<uint8_t>& value) {
   ASSERT_EQ(adapter_.get(), adapter);
 
   ++gatt_characteristic_value_changed_count_;
   last_gatt_characteristic_id_ = characteristic->GetIdentifier();
   last_gatt_characteristic_uuid_ = characteristic->GetUUID();
   last_changed_characteristic_value_ = value;
+  previous_characteristic_value_changed_values_.push_back(value);
 
   ASSERT_TRUE(characteristic->GetService());
   EXPECT_EQ(characteristic->GetService()->GetCharacteristic(
                 last_gatt_characteristic_id_),
             characteristic);
 
   QuitMessageLoop();
 }
 
 void TestBluetoothAdapterObserver::GattDescriptorValueChanged(
@@ skipping 15 matching lines @@
   QuitMessageLoop();
 }
 
 void TestBluetoothAdapterObserver::QuitMessageLoop() {
   if (base::MessageLoop::current() &&
       base::MessageLoop::current()->is_running())
     base::MessageLoop::current()->QuitWhenIdle();
 }
 
 }  // namespace device