Bluetooth: macOS: Implementing read/write for descriptors

device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm

Index: device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm
diff --git a/device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm b/device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm
index 637ffee454fcbe6a996799fb5a9edb35bf0d8c49..f0a4a7338cf17210c78f7401ee488fe5b8baf81d 100644
--- a/device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm
+++ b/device/bluetooth/test/mock_bluetooth_cbperipheral_mac.mm
@@ -8,6 +8,7 @@
 #include "base/mac/scoped_nsobject.h"
 #include "device/bluetooth/test/bluetooth_test_mac.h"
 #include "device/bluetooth/test/mock_bluetooth_cbcharacteristic_mac.h"
+#include "device/bluetooth/test/mock_bluetooth_cbdescriptor_mac.h"
 #include "device/bluetooth/test/mock_bluetooth_cbservice_mac.h"
 
 using base::mac::ObjCCast;
@@ -112,6 +113,18 @@ using base::scoped_nsobject;
   _bluetoothTestMac->OnFakeBluetoothCharacteristicWriteValue(value);
 }
 
+- (void)readValueForDescriptor:(CBDescriptor*)descriptor {
+  DCHECK(_bluetoothTestMac);
+  _bluetoothTestMac->OnFakeBluetoothDescriptorReadValue();
+}
+
+- (void)writeValue:(NSData*)data forDescriptor:(CBDescriptor*)descriptor {
+  DCHECK(_bluetoothTestMac);
+  const uint8_t* buffer = static_cast<const uint8_t*>(data.bytes);
+  std::vector<uint8_t> value(buffer, buffer + data.length);
+  _bluetoothTestMac->OnFakeBluetoothDescriptorWriteValue(value);
+}
+
 - (void)removeAllServices {
   [_services.get() removeAllObjects];
 }