bluetooth: mac: add connected LE devices to chooser

device/bluetooth/bluetooth_adapter_unittest.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/bluetooth_adapter.h"
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <memory>
@@ skipping 852 matching lines @@
   device->CreateGattConnection(GetGattConnectionCallback(Call::EXPECTED),
                                GetConnectErrorCallback(Call::NOT_EXPECTED));
   SimulateGattConnection(device);
   EXPECT_EQ(1u, adapter_->GetDevices().size());
   RemoveTimedOutDevices();
   EXPECT_EQ(0, observer.device_removed_count());
   EXPECT_EQ(1u, adapter_->GetDevices().size());
 }
 #endif  // defined(OS_ANDROID) || defined(OS_MACOSX)
 
+#if defined(OS_MACOSX)
+// Simulate a device being connected before starting discovery session.
+TEST_F(BluetoothTest, DiscoverConnectedLowEnergyDevice) {
+  if (!PlatformSupportsLowEnergy()) {
+    LOG(WARNING) << "Low Energy Bluetooth unavailable, skipping unit test.";
+    return;
+  }
+  InitWithFakeAdapter();
+  TestBluetoothAdapterObserver observer(adapter_);
+
+  SimulateConnectedLowEnergyDevice();
+  // Start discovery and find a device.
+  StartLowEnergyDiscoverySession();
+  SimulateLowEnergyDevice(4);
+  EXPECT_EQ(2, observer.device_added_count());
+  EXPECT_EQ(2u, adapter_->GetDevices().size());
+}
+#endif  // defined(OS_MACOSX)
+
 }  // namespace device