Add unit tests for DeviceRegistryPropertyValue.

device/bluetooth/bluetooth_low_energy_win.h

 // 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.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_WIN_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_WIN_H_
 
 #include <windows.h>
 #include <setupapi.h>
 // #include <bthledef.h>
@@ skipping 22 matching lines @@
             0xf4,
             0x1c,
             0x67,
             0xb5,
             0x92);
 
 #endif  // __BTHLEDEF_H__
 #include <bluetoothapis.h>
 
 #include "base/files/file_path.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/win/scoped_handle.h"
 
 namespace device {
 namespace win {
 
+// Represents a device registry property value
+class DeviceRegistryPropertyValue {
+ public:
+  // Creates a property value instance, where |property_type| is one of REG_xxx
+  // registry value type (e.g. REG_SZ, REG_DWORD), |value| is a byte array
+  // containing the propery value and |value_size| is the number of bytes in
+  // |value|. Note the returned instance takes ownership of |value| array.
+  static scoped_ptr<DeviceRegistryPropertyValue> Create(
+      DWORD property_type,
+      scoped_ptr<uint8_t[]> value,
+      size_t value_size);
+  ~DeviceRegistryPropertyValue();
+
+  // Returns the vaue type a REG_xxx value (e.g. REG_SZ, REG_DWORD, ...)
+  DWORD property_type() const { return property_type_; }
+
+  std::string AsString() const;
+  DWORD AsDWORD() const;
+
+ private:
+  DeviceRegistryPropertyValue(DWORD property_type,
+                              scoped_ptr<uint8_t[]> value,
+                              size_t value_size);
+
+  DWORD property_type_;
+  scoped_ptr<uint8_t[]> value_;
+  size_t value_size_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceRegistryPropertyValue);
+};
+
 // Returns true only on Windows platforms supporting Bluetooth Low Energy.
 bool IsBluetoothLowEnergySupported();
 
 struct BluetoothLowEnergyDeviceInfo {
   BluetoothLowEnergyDeviceInfo() { address.ullLong = BLUETOOTH_NULL_ADDRESS; }
 
   base::FilePath path;
   std::string id;
   std::string friendly_name;
   BLUETOOTH_ADDRESS address;
@@ skipping 10 matching lines @@
 
 bool ExtractBluetoothAddressFromDeviceInstanceIdForTesting(
     const std::string& instance_id,
     BLUETOOTH_ADDRESS* btha,
     std::string* error);
 
 }  // namespace win
 }  // namespace device
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_LOW_ENERGY_WIN_H_