[CrOS Tether] Sort Tether network lists.

chromeos/network/network_state_handler_unittest.cc

 // Copyright (c) 2012 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 "chromeos/network/network_state_handler.h"
 
 #include <stddef.h>
 
+#include <algorithm>
 #include <map>
 #include <memory>
 #include <set>
 #include <string>
 
 #include "base/bind.h"
 #include "base/command_line.h"
 #include "base/macros.h"
 #include "base/run_loop.h"
 #include "base/test/scoped_task_environment.h"
 #include "base/values.h"
 #include "chromeos/chromeos_switches.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/shill_device_client.h"
 #include "chromeos/dbus/shill_ipconfig_client.h"
 #include "chromeos/dbus/shill_manager_client.h"
 #include "chromeos/dbus/shill_profile_client.h"
 #include "chromeos/dbus/shill_service_client.h"
 #include "chromeos/network/device_state.h"
 #include "chromeos/network/network_state.h"
 #include "chromeos/network/network_state_handler.h"
 #include "chromeos/network/network_state_handler_observer.h"
 #include "chromeos/network/tether_constants.h"
 #include "dbus/object_path.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/cros_system_api/dbus/service_constants.h"
 
+namespace chromeos {
+
 namespace {
 
 void ErrorCallbackFunction(const std::string& error_name,
                            const std::string& error_message) {
   LOG(ERROR) << "Shill Error: " << error_name << " : " << error_message;
 }
 
 const char kShillManagerClientStubWifiDevice[] = "/device/stub_wifi_device1";
 const char kShillManagerClientStubCellularDevice[] =
     "/device/stub_cellular_device1";
@@ skipping 146 matching lines @@
   std::string default_network_;
   std::string default_network_connection_state_;
   std::map<std::string, int> property_updates_;
   std::map<std::string, int> device_property_updates_;
   std::map<std::string, int> connection_state_changes_;
   std::map<std::string, std::string> network_connection_state_;
 
   DISALLOW_COPY_AND_ASSIGN(TestObserver);
 };
 
+class TestTetherNetworkListSorter
+    : public NetworkStateHandler::TetherNetworkListSorter {
+ public:
+  TestTetherNetworkListSorter() {}
+  ~TestTetherNetworkListSorter() {}
+
+  // NetworkStateHandler::TetherNetworkListSorter:
+  void SortTetherNetworkList(
+      NetworkStateHandler::ManagedStateList* tether_networks) const override {
+    std::sort(tether_networks->begin(), tether_networks->end(),
+              [](const std::unique_ptr<ManagedState>& first,
+                 const std::unique_ptr<ManagedState>& second) {
+                const NetworkState* first_network =
+                    static_cast<const NetworkState*>(first.get());
+                const NetworkState* second_network =
+                    static_cast<const NetworkState*>(second.get());
+
+                // Sort by reverse-alphabetical order of GUIDs.
+                return first_network->guid() >= second_network->guid();
+              });
+  }
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TestTetherNetworkListSorter);
+};
+
 }  // namespace
 
-namespace chromeos {
-
 class NetworkStateHandlerTest : public testing::Test {
  public:
   NetworkStateHandlerTest()
       : scoped_task_environment_(
             base::test::ScopedTaskEnvironment::MainThreadType::UI),
         device_test_(nullptr),
         manager_test_(nullptr),
         profile_test_(nullptr),
         service_test_(nullptr) {}
   ~NetworkStateHandlerTest() override {}
@@ skipping 240 matching lines @@
       kTetherGuid2, kTetherName2, kTetherCarrier2, kTetherBatteryPercentage2,
       kTetherSignalStrength2, kTetherHasConnectedToHost2);
 
   GetTetherNetworkList(0 /* no limit */, &tether_networks);
   EXPECT_EQ(2u, tether_networks.size());
 
   GetTetherNetworkList(1 /* no limit */, &tether_networks);
   EXPECT_EQ(1u, tether_networks.size());
 }
 
+TEST_F(NetworkStateHandlerTest, SortTetherNetworkList) {
+  network_state_handler_->SetTetherTechnologyState(
+      NetworkStateHandler::TECHNOLOGY_ENABLED);
+
+  TestTetherNetworkListSorter sorter;
+  network_state_handler_->SetTetherNetworkListSorter(&sorter);
+
+  network_state_handler_->AddTetherNetworkState(
+      kTetherGuid1, kTetherName1, kTetherCarrier1, kTetherBatteryPercentage1,
+      kTetherSignalStrength1, kTetherHasConnectedToHost1);
+  network_state_handler_->AddTetherNetworkState(
+      kTetherGuid2, kTetherName2, kTetherCarrier2, kTetherBatteryPercentage2,
+      kTetherSignalStrength2, kTetherHasConnectedToHost2);
+
+  // Note: GetVisibleNetworkListByType() sorts before outputting networks.
+  NetworkStateHandler::NetworkStateList tether_networks;
+  network_state_handler_->GetVisibleNetworkListByType(
+      NetworkTypePattern::Tether(), &tether_networks);
+
+  // The list should have been reversed due to reverse-alphabetical sorting.
+  EXPECT_EQ(2u, tether_networks.size());
+  EXPECT_EQ(kTetherGuid2, tether_networks[0]->guid());
+  EXPECT_EQ(kTetherGuid1, tether_networks[1]->guid());
+}
+
+TEST_F(NetworkStateHandlerTest, SortTetherNetworkList_NoSortingDelegate) {
+  network_state_handler_->SetTetherTechnologyState(
+      NetworkStateHandler::TECHNOLOGY_ENABLED);
+
+  // Do not set a TetherNetworkListSorter.
+
+  network_state_handler_->AddTetherNetworkState(
+      kTetherGuid1, kTetherName1, kTetherCarrier1, kTetherBatteryPercentage1,
+      kTetherSignalStrength1, kTetherHasConnectedToHost1);
+  network_state_handler_->AddTetherNetworkState(
+      kTetherGuid2, kTetherName2, kTetherCarrier2, kTetherBatteryPercentage2,
+      kTetherSignalStrength2, kTetherHasConnectedToHost2);
+
+  // Note: GetVisibleNetworkListByType() sorts before outputting networks.
+  NetworkStateHandler::NetworkStateList tether_networks;
+  network_state_handler_->GetVisibleNetworkListByType(
+      NetworkTypePattern::Tether(), &tether_networks);
+
+  // The list should be in the original order.
+  EXPECT_EQ(2u, tether_networks.size());
+  EXPECT_EQ(kTetherGuid1, tether_networks[0]->guid());
+  EXPECT_EQ(kTetherGuid2, tether_networks[1]->guid());
+}
+
 TEST_F(NetworkStateHandlerTest, NetworkListChanged) {
   size_t stub_network_count = test_observer_->network_count();
   // Set up two additional visible networks.
   const std::string wifi3 = "/service/wifi3";
   const std::string wifi4 = "/service/wifi4";
   service_test_->SetServiceProperties(
       wifi3, "wifi3_guid", "wifi3",
       shill::kTypeWifi, shill::kStateIdle, true /* visible */);
   service_test_->SetServiceProperties(
       wifi4, "wifi4_guid", "wifi4",
@@ skipping 1013 matching lines @@
                                     shill::kIPConfigProperty,
                                     base::Value(kIPConfigPath));
   UpdateManagerProperties();
   EXPECT_EQ(1, test_observer_->PropertyUpdatesForDevice(
       kShillManagerClientStubWifiDevice));
   EXPECT_EQ(1, test_observer_->PropertyUpdatesForService(
       kShillManagerClientStubDefaultWifi));
 }
 
 }  // namespace chromeos