Update mirroring display even if the display configurations that are visible to ash/chrome hasn't c…

ash/display/display_manager_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 "ash/display/display_manager.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_controller.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_layout_store.h"
 #include "ash/display/display_util.h"
+#include "ash/display/mirror_window_controller.h"
 #include "ash/screen_util.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/display_manager_test_api.h"
 #include "ash/test/mirror_window_test_api.h"
 #include "base/command_line.h"
 #include "base/format_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "ui/aura/env.h"
@@ skipping 1313 matching lines @@
 
   // Overscan insets are ignored.
   UpdateDisplay("400x600/o,600x800/o");
   EXPECT_FALSE(display_observer.changed_and_reset());
   EXPECT_EQ("400x600",
             test_api.GetHost()->window()->bounds().size().ToString());
 
   Shell::GetScreen()->RemoveObserver(&display_observer);
 }
 
+TEST_F(DisplayManagerTest, SingleDisplayToSoftwareMirroring) {
+  if (!SupportsMultipleDisplays())
+    return;
+  UpdateDisplay("600x400");
+
+  DisplayManager* display_manager = Shell::GetInstance()->display_manager();
+  display_manager->SetSecondDisplayMode(DisplayManager::MIRRORING);
+  UpdateDisplay("600x400,600x400");
+
+  EXPECT_TRUE(display_manager->IsMirrored());
+  EXPECT_EQ(1U, display_manager->GetNumDisplays());
+  DisplayController* display_controller =
+      ash::Shell::GetInstance()->display_controller();
+  EXPECT_TRUE(display_controller->mirror_window_controller()->GetWindow());
+
+  UpdateDisplay("600x400");
+  EXPECT_FALSE(display_manager->IsMirrored());
+  EXPECT_EQ(1U, display_manager->GetNumDisplays());
+  EXPECT_FALSE(display_controller->mirror_window_controller()->GetWindow());
+}
+
 #if defined(OS_CHROMEOS)
 // Make sure this does not cause any crashes. See http://crbug.com/412910
 // This test is limited to OS_CHROMEOS because CursorCompositingEnabled is only
 // for ChromeOS.
 TEST_F(DisplayManagerTest, SoftwareMirroringWithCompositingCursor) {
   if (!SupportsMultipleDisplays())
     return;
 
   UpdateDisplay("300x400,400x500");
 
@@ skipping 323 matching lines @@
       1.25f, Shell::GetScreen()->GetPrimaryDisplay().device_scale_factor());
   EXPECT_TRUE(IsTextSubpixelPositioningEnabled());
   EXPECT_EQ(gfx::FontRenderParams::HINTING_NONE, GetFontHintingParams());
 
   DisplayInfo::SetUse125DSFForUIScaling(false);
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash