chromeos: Fix crash when clicking on networking menu under mash

ash/system/network/tray_network_unittest.cc

Index: ash/system/network/tray_network_unittest.cc
diff --git a/ash/system/network/tray_network_unittest.cc b/ash/system/network/tray_network_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a1dd9973026cd903b42b9157675523a10bcf03d9
--- /dev/null
+++ b/ash/system/network/tray_network_unittest.cc
@@ -0,0 +1,92 @@
+// Copyright 2017 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 "ash/system/network/tray_network.h"
+
+#include "ash/login_status.h"
+#include "ash/system/network/network_state_list_detailed_view.h"
+#include "ash/system/tray/system_tray.h"
+#include "ash/test/ash_test_base.h"
+#include "base/macros.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/network/network_handler.h"
+#include "components/prefs/testing_pref_service.h"
+#include "ui/message_center/message_center.h"
+
+using message_center::MessageCenter;
+
+namespace ash {
+namespace {
+
+class TrayNetworkTest : public test::AshTestBase {
+ public:
+  TrayNetworkTest() = default;
+  ~TrayNetworkTest() override = default;
+
+  // testing::Test:
+  void SetUp() override {
+    chromeos::DBusThreadManager::Initialize();
+    // Initializing NetworkHandler before ash is more like production.
+    chromeos::NetworkHandler::Initialize();
+    test::AshTestBase::SetUp();
+    chromeos::NetworkHandler::Get()->InitializePrefServices(&profile_prefs_,
+                                                            &local_state_);
+    // Networking stubs may have asynchronous initialization.
+    RunAllPendingInMessageLoop();
+  }
+
+  void TearDown() override {
+    // This roughly matches production shutdown order.
+    chromeos::NetworkHandler::Get()->ShutdownPrefServices();
+    test::AshTestBase::TearDown();
+    chromeos::NetworkHandler::Shutdown();
+    chromeos::DBusThreadManager::Shutdown();
+  }
+
+ private:
+  TestingPrefServiceSimple profile_prefs_;
+  TestingPrefServiceSimple local_state_;
+
+  DISALLOW_COPY_AND_ASSIGN(TrayNetworkTest);
+};
+
+// Verifies that the network views can be created.
+TEST_F(TrayNetworkTest, Basics) {
+  // Open the system tray menu.
+  SystemTray* system_tray = GetPrimarySystemTray();
+  system_tray->ShowDefaultView(BUBBLE_CREATE_NEW);
+  RunAllPendingInMessageLoop();
+
+  // Show network details.
+  TrayNetwork* tray_network = system_tray->GetTrayNetworkForTesting();
+  const int close_delay_in_seconds = 0;
+  bool activate = true;
+  system_tray->ShowDetailedView(tray_network, close_delay_in_seconds, activate,
+                                BUBBLE_USE_EXISTING);
+  RunAllPendingInMessageLoop();
+
+  // Network details view was created.
+  ASSERT_TRUE(tray_network->detailed());
+  EXPECT_TRUE(tray_network->detailed()->visible());
+}
+
+// Verifies that toggling Wi-Fi (usually via keyboard) shows a notification.
+TEST_F(TrayNetworkTest, ToggleWifi) {
+  TrayNetwork* tray_network =
+      GetPrimarySystemTray()->GetTrayNetworkForTesting();
+
+  // No notifications at startup.
+  ASSERT_EQ(0u, MessageCenter::Get()->NotificationCount());
+
+  // Simulate a user action to toggle Wi-Fi.
+  tray_network->RequestToggleWifi();
+
+  // Notification was shown.
+  EXPECT_EQ(1u, MessageCenter::Get()->NotificationCount());
+  EXPECT_TRUE(MessageCenter::Get()->HasPopupNotifications());
+  EXPECT_TRUE(MessageCenter::Get()->FindVisibleNotificationById("wifi-toggle"));
+}
+
+}  // namespace
+}  // namespace ash