Implement finding BLE connections in chrome://proximity-auth.

components/proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.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 "components/proximity_auth/ble/bluetooth_low_energy_connection_finder.h"
 
 #include <string>
 
 #include "base/bind.h"
 #include "base/memory/ref_counted.h"
@@ skipping 348 matching lines @@
   // Starting discovery.
   FindAndExpectStartDiscovery(connection_finder);
   ExpectStopDiscoveryAndRemoveObserver();
 
   // Finding and creating a connection to the right device.
   MockConnection* connection = connection_finder.ExpectCreateConnection();
   PrepareForNewRightDevice(kServiceUUID);
   connection_finder.DeviceAdded(adapter_.get(), device_.get());
 
   // Creating a connection.
+  base::RunLoop run_loop;
   EXPECT_FALSE(last_found_connection_);
   connection->SetStatus(Connection::IN_PROGRESS);
   connection->SetStatus(Connection::CONNECTED);
+  run_loop.RunUntilIdle();
   EXPECT_TRUE(last_found_connection_);
 }
 
 TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
        Find_ConnectionFails_RestartDiscoveryAndConnectionSucceeds) {
   StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
       device_whitelist_.get());
 
   // Starting discovery.
   FindAndExpectStartDiscovery(connection_finder);
@@ skipping 35 matching lines @@
 
   // Preparing to create a GATT connection to the right device.
   PrepareForNewRightDevice(kServiceUUID);
   connection = connection_finder.ExpectCreateConnection();
 
   // Trying to create a connection.
   connection_finder.DeviceAdded(adapter_.get(), device_.get());
   EXPECT_CALL(*last_discovery_session_alias_, Stop(_, _)).Times(AtLeast(1));
 
   // Completing the connection.
+  base::RunLoop run_loop;
   EXPECT_FALSE(last_found_connection_);
   connection->SetStatus(Connection::IN_PROGRESS);
   connection->SetStatus(Connection::CONNECTED);
+  run_loop.RunUntilIdle();
   EXPECT_TRUE(last_found_connection_);
 }
 
 TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
        Find_AdapterRemoved_RestartDiscoveryAndConnectionSucceeds) {
   StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
       device_whitelist_.get());
 
   // Starting discovery.
   FindAndExpectStartDiscovery(connection_finder);
@@ skipping 28 matching lines @@
 
   // Preparing to create a GATT connection to the right device.
   PrepareForNewRightDevice(kServiceUUID);
   MockConnection* connection = connection_finder.ExpectCreateConnection();
 
   // Trying to create a connection.
   connection_finder.DeviceAdded(adapter_.get(), device_.get());
   EXPECT_CALL(*last_discovery_session_alias_, Stop(_, _)).Times(AtLeast(1));
 
   // Completing the connection.
+  base::RunLoop run_loop;
   ASSERT_FALSE(last_found_connection_);
   connection->SetStatus(Connection::IN_PROGRESS);
   connection->SetStatus(Connection::CONNECTED);
+  run_loop.RunUntilIdle();
   EXPECT_TRUE(last_found_connection_);
 }
 
 }  // namespace proximity_auth