Revert of [EasyUnlock] Update BluetoothLowEnergyConnectionFinder to look for EIDs.

components/proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc

Index: components/proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc
diff --git a/components/proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc b/components/proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..e2abae9512c639db41aae7ed7324abe2fb6b3cb8
--- /dev/null
+++ b/components/proximity_auth/ble/bluetooth_low_energy_connection_finder_unittest.cc
@@ -0,0 +1,509 @@
+// 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 <memory>
+#include <string>
+#include <utility>
+
+#include "base/bind.h"
+#include "base/macros.h"
+#include "base/memory/ptr_util.h"
+#include "base/memory/ref_counted.h"
+#include "base/message_loop/message_loop.h"
+#include "base/run_loop.h"
+#include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
+#include "components/cryptauth/connection.h"
+#include "components/cryptauth/cryptauth_test_util.h"
+#include "components/cryptauth/fake_connection.h"
+#include "components/cryptauth/remote_device.h"
+#include "components/cryptauth/wire_message.h"
+#include "components/proximity_auth/ble/bluetooth_low_energy_device_whitelist.h"
+#include "device/bluetooth/bluetooth_adapter_factory.h"
+#include "device/bluetooth/bluetooth_uuid.h"
+#include "device/bluetooth/test/mock_bluetooth_adapter.h"
+#include "device/bluetooth/test/mock_bluetooth_device.h"
+#include "device/bluetooth/test/mock_bluetooth_discovery_session.h"
+#include "device/bluetooth/test/mock_bluetooth_gatt_connection.h"
+#include "testing/gmock/include/gmock/gmock.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+using testing::_;
+using testing::AtLeast;
+using testing::NiceMock;
+using testing::Return;
+using testing::StrictMock;
+using testing::SaveArg;
+
+using device::BluetoothDevice;
+
+namespace proximity_auth {
+namespace {
+
+const char kServiceUUID[] = "DEADBEEF-CAFE-FEED-FOOD-D15EA5EBEEEF";
+const char kOtherUUID[] = "AAAAAAAA-AAAA-AAAA-AAAA-D15EA5EBEEEF";
+
+const int kMaxNumberOfAttempts = 2;
+
+class MockBluetoothLowEnergyDeviceWhitelist
+    : public BluetoothLowEnergyDeviceWhitelist {
+ public:
+  MockBluetoothLowEnergyDeviceWhitelist()
+      : BluetoothLowEnergyDeviceWhitelist(nullptr) {}
+  ~MockBluetoothLowEnergyDeviceWhitelist() override {}
+
+  MOCK_CONST_METHOD1(HasDeviceWithAddress, bool(const std::string&));
+};
+
+class MockBluetoothLowEnergyConnectionFinder
+    : public BluetoothLowEnergyConnectionFinder {
+ public:
+  MockBluetoothLowEnergyConnectionFinder(
+      const BluetoothLowEnergyDeviceWhitelist* device_whitelist,
+      FinderStrategy finder_strategy)
+      : BluetoothLowEnergyConnectionFinder(
+            cryptauth::CreateLERemoteDeviceForTest(),
+            kServiceUUID,
+            finder_strategy,
+            device_whitelist,
+            nullptr,
+            kMaxNumberOfAttempts) {}
+
+  ~MockBluetoothLowEnergyConnectionFinder() override {}
+
+  // Mock methods don't support return type std::unique_ptr<>. This is a
+  // possible workaround: mock a proxy method to be called by the target
+  // overridden method (CreateConnection).
+  MOCK_METHOD0(CreateConnectionProxy, cryptauth::Connection*());
+
+  // Creates a mock connection and sets an expectation that the mock connection
+  // finder's CreateConnection() method will be called and will return the
+  // created connection. Returns a reference to the created connection.
+  // NOTE: The returned connection's lifetime is managed by the connection
+  // finder.
+  cryptauth::FakeConnection* ExpectCreateConnection() {
+    std::unique_ptr<cryptauth::FakeConnection> connection(
+        new cryptauth::FakeConnection(
+            cryptauth::CreateLERemoteDeviceForTest()));
+    cryptauth::FakeConnection* connection_alias = connection.get();
+    EXPECT_CALL(*this, CreateConnectionProxy())
+        .WillOnce(Return(connection.release()));
+    return connection_alias;
+  }
+
+  MOCK_METHOD0(CloseGattConnectionProxy, void(void));
+
+ protected:
+  std::unique_ptr<cryptauth::Connection> CreateConnection(
+      const std::string& device_address) override {
+    return base::WrapUnique(CreateConnectionProxy());
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(MockBluetoothLowEnergyConnectionFinder);
+};
+
+}  // namespace
+
+class ProximityAuthBluetoothLowEnergyConnectionFinderTest
+    : public testing::Test {
+ protected:
+  ProximityAuthBluetoothLowEnergyConnectionFinderTest()
+      : adapter_(new NiceMock<device::MockBluetoothAdapter>),
+        connection_callback_(
+            base::Bind(&ProximityAuthBluetoothLowEnergyConnectionFinderTest::
+                           OnConnectionFound,
+                       base::Unretained(this))),
+        device_(new NiceMock<device::MockBluetoothDevice>(
+            adapter_.get(),
+            0,
+            cryptauth::kTestRemoteDeviceName,
+            cryptauth::kTestRemoteDeviceBluetoothAddress,
+            false,
+            false)),
+        device_whitelist_(new MockBluetoothLowEnergyDeviceWhitelist()),
+        last_discovery_session_alias_(nullptr) {
+    device::BluetoothAdapterFactory::SetAdapterForTesting(adapter_);
+
+    std::vector<const device::BluetoothDevice*> devices;
+    ON_CALL(*adapter_, GetDevices()).WillByDefault(Return(devices));
+
+    ON_CALL(*adapter_, IsPresent()).WillByDefault(Return(true));
+    ON_CALL(*adapter_, IsPowered()).WillByDefault(Return(true));
+
+    ON_CALL(*device_whitelist_, HasDeviceWithAddress(_))
+        .WillByDefault(Return(false));
+  }
+
+  void OnConnectionFound(std::unique_ptr<cryptauth::Connection> connection) {
+    last_found_connection_ = std::move(connection);
+  }
+
+  void FindAndExpectStartDiscovery(
+      BluetoothLowEnergyConnectionFinder& connection_finder) {
+    device::BluetoothAdapter::DiscoverySessionCallback discovery_callback;
+    std::unique_ptr<device::MockBluetoothDiscoverySession> discovery_session(
+        new NiceMock<device::MockBluetoothDiscoverySession>());
+    last_discovery_session_alias_ = discovery_session.get();
+
+    // Starting a discovery session. StartDiscoveryWithFilterRaw is a proxy for
+    // StartDiscoveryWithFilter.
+    EXPECT_CALL(*adapter_, StartDiscoverySessionWithFilterRaw(_, _, _))
+        .WillOnce(SaveArg<1>(&discovery_callback));
+    EXPECT_CALL(*adapter_, AddObserver(_));
+    ON_CALL(*last_discovery_session_alias_, IsActive())
+        .WillByDefault(Return(true));
+    connection_finder.Find(connection_callback_);
+    ASSERT_FALSE(discovery_callback.is_null());
+    discovery_callback.Run(std::move(discovery_session));
+  }
+
+  void ExpectRemoveObserver() {
+    EXPECT_CALL(*adapter_, RemoveObserver(_)).Times(AtLeast(1));
+  }
+
+  // Prepare |device_| with |uuid|.
+  void PrepareDevice(const std::string& uuid,
+                     const std::string& address,
+                     bool paired) {
+    BluetoothDevice::UUIDSet uuids = {device::BluetoothUUID(uuid)};
+    ON_CALL(*device_, GetUUIDs()).WillByDefault(Return(uuids));
+    ON_CALL(*device_, GetAddress()).WillByDefault(Return(address));
+    ON_CALL(*device_, IsPaired()).WillByDefault(Return(paired));
+  }
+
+  scoped_refptr<device::MockBluetoothAdapter> adapter_;
+  cryptauth::ConnectionFinder::ConnectionCallback connection_callback_;
+  std::unique_ptr<device::MockBluetoothDevice> device_;
+  std::unique_ptr<cryptauth::Connection> last_found_connection_;
+  std::unique_ptr<MockBluetoothLowEnergyDeviceWhitelist> device_whitelist_;
+  device::MockBluetoothDiscoverySession* last_discovery_session_alias_;
+
+ private:
+  base::MessageLoop message_loop_;
+};
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       ConstructAndDestroyDoesntCrash) {
+  // Destroying a BluetoothConnectionFinder for which Find() has not been called
+  // should not crash.
+  BluetoothLowEnergyConnectionFinder connection_finder(
+      cryptauth::CreateLERemoteDeviceForTest(), kServiceUUID,
+      BluetoothLowEnergyConnectionFinder::FIND_PAIRED_DEVICE,
+      device_whitelist_.get(), nullptr, kMaxNumberOfAttempts);
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_StartsDiscoverySession) {
+  BluetoothLowEnergyConnectionFinder connection_finder(
+      cryptauth::CreateLERemoteDeviceForTest(), kServiceUUID,
+      BluetoothLowEnergyConnectionFinder::FIND_PAIRED_DEVICE,
+      device_whitelist_.get(), nullptr, kMaxNumberOfAttempts);
+
+  EXPECT_CALL(*adapter_, StartDiscoverySessionWithFilterRaw(_, _, _));
+  EXPECT_CALL(*adapter_, AddObserver(_));
+  connection_finder.Find(connection_callback_);
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_StopsDiscoverySessionBeforeDestroying) {
+  BluetoothLowEnergyConnectionFinder connection_finder(
+      cryptauth::CreateLERemoteDeviceForTest(), kServiceUUID,
+      BluetoothLowEnergyConnectionFinder::FIND_PAIRED_DEVICE,
+      device_whitelist_.get(), nullptr, kMaxNumberOfAttempts);
+
+  device::BluetoothAdapter::DiscoverySessionCallback discovery_callback;
+  std::unique_ptr<device::MockBluetoothDiscoverySession> discovery_session(
+      new NiceMock<device::MockBluetoothDiscoverySession>());
+  device::MockBluetoothDiscoverySession* discovery_session_alias =
+      discovery_session.get();
+
+  EXPECT_CALL(*adapter_, StartDiscoverySessionWithFilterRaw(_, _, _))
+      .WillOnce(SaveArg<1>(&discovery_callback));
+  ON_CALL(*discovery_session_alias, IsActive()).WillByDefault(Return(true));
+  EXPECT_CALL(*adapter_, AddObserver(_));
+  connection_finder.Find(connection_callback_);
+
+  ASSERT_FALSE(discovery_callback.is_null());
+  discovery_callback.Run(std::move(discovery_session));
+
+  EXPECT_CALL(*adapter_, RemoveObserver(_));
+}
+
+// TODO(sacomoto): Remove it when ProximityAuthBleSystem is not needed anymore.
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_CreatesConnectionWhenWhitelistedDeviceIsAdded) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      device_whitelist_.get(),
+      BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  BluetoothDevice::UUIDSet uuids;
+  ON_CALL(*device_, GetUUIDs()).WillByDefault(Return(uuids));
+  ON_CALL(*device_, IsPaired()).WillByDefault(Return(true));
+  ON_CALL(*device_whitelist_, HasDeviceWithAddress(_))
+      .WillByDefault(Return(true));
+
+  connection_finder.ExpectCreateConnection();
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_CreatesConnectionWhenRightDeviceIsAdded_NoPublicAddress) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                false);
+  ON_CALL(*device_, GetName())
+      .WillByDefault(Return(std::string(cryptauth::kTestRemoteDeviceName)));
+
+  connection_finder.ExpectCreateConnection();
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_DoesntCreatesConnectionWhenWrongDeviceIsAdded_NoPublicAddress) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  PrepareDevice(kOtherUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                false);
+  ON_CALL(*device_, GetName()).WillByDefault(Return(std::string("Other name")));
+
+  EXPECT_CALL(connection_finder, CreateConnectionProxy()).Times(0);
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_CreatesConnectionWhenRightDeviceIsAdded_HasPublicAddress) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+  connection_finder.ExpectCreateConnection();
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_DoesntCreateConnectionWhenWrongDeviceIsAdded_HasPublicAddress) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  PrepareDevice(kOtherUUID, "", true);
+  EXPECT_CALL(connection_finder, CreateConnectionProxy()).Times(0);
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_CreatesConnectionWhenRightDeviceIsChanged_HasPublicAddress) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+  connection_finder.ExpectCreateConnection();
+  connection_finder.DeviceChanged(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_DoesntCreateConnectionWhenWrongDeviceIsChanged_HasPublicAddress) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  PrepareDevice(kOtherUUID, "", true);
+  EXPECT_CALL(connection_finder, CreateConnectionProxy()).Times(0);
+  connection_finder.DeviceChanged(adapter_.get(), device_.get());
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_CreatesOnlyOneConnection) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_ANY_DEVICE);
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  // Prepare to add |device_|.
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+
+  // Prepare to add |other_device|.
+  NiceMock<device::MockBluetoothDevice> other_device(
+      adapter_.get(), 0, cryptauth::kTestRemoteDeviceName,
+      cryptauth::kTestRemoteDeviceBluetoothAddress, false, false);
+  BluetoothDevice::UUIDSet uuids = {device::BluetoothUUID(kServiceUUID)};
+  ON_CALL(other_device, GetAddress())
+      .WillByDefault(Return(cryptauth::kTestRemoteDeviceBluetoothAddress));
+  ON_CALL(other_device, IsPaired()).WillByDefault(Return(true));
+  ON_CALL(other_device, GetUUIDs()).WillByDefault((Return(uuids)));
+
+  // Only one connection should be created.
+  connection_finder.ExpectCreateConnection();
+
+  // Add the devices.
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+  connection_finder.DeviceAdded(adapter_.get(), &other_device);
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_ConnectionSucceeds_WithRemoteDevice) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_PAIRED_DEVICE);
+  // Starting discovery.
+  FindAndExpectStartDiscovery(connection_finder);
+  ExpectRemoveObserver();
+
+  // Finding and creating a connection to the right device.
+  cryptauth::FakeConnection* connection =
+      connection_finder.ExpectCreateConnection();
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+
+  // Creating a connection.
+  base::RunLoop run_loop;
+  EXPECT_FALSE(last_found_connection_);
+  connection->SetStatus(cryptauth::Connection::IN_PROGRESS);
+  connection->SetStatus(cryptauth::Connection::CONNECTED);
+  run_loop.RunUntilIdle();
+  EXPECT_TRUE(last_found_connection_);
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_ConnectionFails_RestartDiscoveryAndConnectionSucceeds) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_PAIRED_DEVICE);
+
+  // Starting discovery.
+  FindAndExpectStartDiscovery(connection_finder);
+
+  // Preparing to create a GATT connection to the right device.
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+  cryptauth::FakeConnection* connection =
+      connection_finder.ExpectCreateConnection();
+
+  // Trying to create a connection.
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+  ASSERT_FALSE(last_found_connection_);
+  connection->SetStatus(cryptauth::Connection::IN_PROGRESS);
+
+  // Preparing to restart the discovery session.
+  device::BluetoothAdapter::DiscoverySessionCallback discovery_callback;
+  std::vector<const device::BluetoothDevice*> devices;
+  ON_CALL(*adapter_, GetDevices()).WillByDefault(Return(devices));
+  EXPECT_CALL(*adapter_, StartDiscoverySessionWithFilterRaw(_, _, _))
+      .WillOnce(SaveArg<1>(&discovery_callback));
+
+  // Connection fails.
+  {
+    base::RunLoop run_loop;
+    connection->SetStatus(cryptauth::Connection::DISCONNECTED);
+    run_loop.RunUntilIdle();
+  }
+
+  // Restarting the discovery session.
+  std::unique_ptr<device::MockBluetoothDiscoverySession> discovery_session(
+      new NiceMock<device::MockBluetoothDiscoverySession>());
+  last_discovery_session_alias_ = discovery_session.get();
+  ON_CALL(*last_discovery_session_alias_, IsActive())
+      .WillByDefault(Return(true));
+  ASSERT_FALSE(discovery_callback.is_null());
+  discovery_callback.Run(std::move(discovery_session));
+
+  // Preparing to create a GATT connection to the right device.
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+  connection = connection_finder.ExpectCreateConnection();
+
+  // Trying to create a connection.
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+
+  // Completing the connection.
+  {
+    base::RunLoop run_loop;
+    EXPECT_FALSE(last_found_connection_);
+    connection->SetStatus(cryptauth::Connection::IN_PROGRESS);
+    connection->SetStatus(cryptauth::Connection::CONNECTED);
+    run_loop.RunUntilIdle();
+  }
+  EXPECT_TRUE(last_found_connection_);
+}
+
+TEST_F(ProximityAuthBluetoothLowEnergyConnectionFinderTest,
+       Find_AdapterRemoved_RestartDiscoveryAndConnectionSucceeds) {
+  StrictMock<MockBluetoothLowEnergyConnectionFinder> connection_finder(
+      nullptr, BluetoothLowEnergyConnectionFinder::FIND_PAIRED_DEVICE);
+
+  // Starting discovery.
+  FindAndExpectStartDiscovery(connection_finder);
+
+  // Removing the adapter.
+  ON_CALL(*adapter_, IsPresent()).WillByDefault(Return(false));
+  ON_CALL(*adapter_, IsPowered()).WillByDefault(Return(false));
+  ON_CALL(*last_discovery_session_alias_, IsActive())
+      .WillByDefault(Return(false));
+  connection_finder.AdapterPoweredChanged(adapter_.get(), false);
+  connection_finder.AdapterPresentChanged(adapter_.get(), false);
+
+  // Adding the adapter.
+  ON_CALL(*adapter_, IsPresent()).WillByDefault(Return(true));
+  ON_CALL(*adapter_, IsPowered()).WillByDefault(Return(true));
+
+  device::BluetoothAdapter::DiscoverySessionCallback discovery_callback;
+  std::unique_ptr<device::MockBluetoothDiscoverySession> discovery_session(
+      new NiceMock<device::MockBluetoothDiscoverySession>());
+  last_discovery_session_alias_ = discovery_session.get();
+
+  // Restarting the discovery session.
+  EXPECT_CALL(*adapter_, StartDiscoverySessionWithFilterRaw(_, _, _))
+      .WillOnce(SaveArg<1>(&discovery_callback));
+  connection_finder.AdapterPresentChanged(adapter_.get(), true);
+  connection_finder.AdapterPoweredChanged(adapter_.get(), true);
+  ON_CALL(*last_discovery_session_alias_, IsActive())
+      .WillByDefault(Return(true));
+
+  ASSERT_FALSE(discovery_callback.is_null());
+  discovery_callback.Run(std::move(discovery_session));
+
+  // Preparing to create a GATT connection to the right device.
+  PrepareDevice(kServiceUUID, cryptauth::kTestRemoteDeviceBluetoothAddress,
+                true);
+  cryptauth::FakeConnection* connection =
+      connection_finder.ExpectCreateConnection();
+
+  // Trying to create a connection.
+  connection_finder.DeviceAdded(adapter_.get(), device_.get());
+
+  // Completing the connection.
+  base::RunLoop run_loop;
+  ASSERT_FALSE(last_found_connection_);
+  connection->SetStatus(cryptauth::Connection::IN_PROGRESS);
+  connection->SetStatus(cryptauth::Connection::CONNECTED);
+  run_loop.RunUntilIdle();
+  EXPECT_TRUE(last_found_connection_);
+}
+
+}  // namespace proximity_auth