ash/touch/touch_observer_hud_unittest.cc - chromium/src - Git at Google

 // Copyright (c) 2013 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/touch/touch_observer_hud.h"

 #include "ash/public/cpp/ash_switches.h"
 #include "ash/root_window_controller.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/touch/touch_devices_controller.h"
 #include "ash/touch/touch_hud_debug.h"
 #include "ash/touch/touch_hud_projection.h"
 #include "ash/touch/touch_hud_renderer.h"
 #include "base/command_line.h"
 #include "base/format_macros.h"
 #include "base/strings/stringprintf.h"
 #include "ui/aura/window.h"
 #include "ui/display/manager/display_manager.h"
 #include "ui/display/test/display_manager_test_api.h"
 #include "ui/views/widget/widget.h"

 namespace ash {

 class TouchHudTestBase : public AshTestBase {
  public:
   TouchHudTestBase() = default;
   ~TouchHudTestBase() override = default;

   void SetUp() override {
     AshTestBase::SetUp();

     // Initialize display infos. They should be initialized after Ash
     // environment is set up, i.e., after AshTestBase::SetUp().
     internal_display_id_ =
         display::test::DisplayManagerTestApi(Shell::Get()->display_manager())
             .SetFirstDisplayAsInternalDisplay();
     external_display_id_ = 10;
     mirrored_display_id_ = 11;

     internal_display_info_ =
         CreateDisplayInfo(internal_display_id_, gfx::Rect(0, 0, 500, 500));
     external_display_info_ =
         CreateDisplayInfo(external_display_id_, gfx::Rect(1, 1, 100, 100));
     mirrored_display_info_ =
         CreateDisplayInfo(mirrored_display_id_, gfx::Rect(0, 0, 100, 100));
   }

   display::Display GetPrimaryDisplay() {
     return display::Screen::GetScreen()->GetPrimaryDisplay();
   }

   void SetupSingleDisplay() {
     display_info_list_.clear();
     display_info_list_.push_back(internal_display_info_);
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void SetupDualDisplays() {
     display_info_list_.clear();
     display_info_list_.push_back(internal_display_info_);
     display_info_list_.push_back(external_display_info_);
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void SetInternalAsPrimary() {
     GetWindowTreeHostManager()->SetPrimaryDisplayId(internal_display_id_);
   }

   void SetExternalAsPrimary() {
     GetWindowTreeHostManager()->SetPrimaryDisplayId(external_display_id_);
   }

   void MirrorDisplays() {
     DCHECK_EQ(2U, display_info_list_.size());
     DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
     DCHECK_EQ(external_display_id_, display_info_list_[1].id());
     display_info_list_[1] = mirrored_display_info_;
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void UnmirrorDisplays() {
     DCHECK_EQ(2U, display_info_list_.size());
     DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
     DCHECK_EQ(mirrored_display_id_, display_info_list_[1].id());
     display_info_list_[1] = external_display_info_;
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void RemoveInternalDisplay() {
     DCHECK_LT(0U, display_info_list_.size());
     DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
     display_info_list_.erase(display_info_list_.begin());
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void RemoveExternalDisplay() {
     DCHECK_EQ(2U, display_info_list_.size());
     display_info_list_.pop_back();
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void AddInternalDisplay() {
     DCHECK_EQ(0U, display_info_list_.size());
     display_info_list_.push_back(internal_display_info_);
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   void AddExternalDisplay() {
     DCHECK_EQ(1U, display_info_list_.size());
     display_info_list_.push_back(external_display_info_);
     display_manager()->OnNativeDisplaysChanged(display_info_list_);
   }

   int64_t internal_display_id() const { return internal_display_id_; }

   int64_t external_display_id() const { return external_display_id_; }

  protected:

   WindowTreeHostManager* GetWindowTreeHostManager() {
     return Shell::Get()->window_tree_host_manager();
   }

   const display::Display& GetInternalDisplay() {
     return display_manager()->GetDisplayForId(internal_display_id_);
   }

   const display::Display& GetExternalDisplay() {
     return display_manager()->GetDisplayForId(external_display_id_);
   }

   aura::Window* GetInternalRootWindow() {
     return Shell::GetRootWindowForDisplayId(internal_display_id_);
   }

   aura::Window* GetExternalRootWindow() {
     return Shell::GetRootWindowForDisplayId(external_display_id_);
   }

   aura::Window* GetPrimaryRootWindow() {
     const display::Display& display = GetPrimaryDisplay();
     return Shell::GetRootWindowForDisplayId(display.id());
   }

   aura::Window* GetSecondaryRootWindow() {
     const display::Display& display = display_manager()->GetSecondaryDisplay();
     return Shell::GetRootWindowForDisplayId(display.id());
   }

   RootWindowController* GetInternalRootController() {
     aura::Window* root = GetInternalRootWindow();
     return RootWindowController::ForWindow(root);
   }

   RootWindowController* GetExternalRootController() {
     aura::Window* root = GetExternalRootWindow();
     return RootWindowController::ForWindow(root);
   }

   RootWindowController* GetPrimaryRootController() {
     aura::Window* root = GetPrimaryRootWindow();
     return RootWindowController::ForWindow(root);
   }

   RootWindowController* GetSecondaryRootController() {
     aura::Window* root = GetSecondaryRootWindow();
     return RootWindowController::ForWindow(root);
   }

   display::ManagedDisplayInfo CreateDisplayInfo(int64_t id,
                                                 const gfx::Rect& bounds) {
     display::ManagedDisplayInfo info(id, base::StringPrintf("x-%" PRId64, id),
                                      false);
     info.SetBounds(bounds);
     return info;
   }

   aura::Window* GetRootWindowForTouchHud(TouchObserverHud* hud) {
     return hud->root_window_;
   }

   views::Widget* GetWidgetForTouchHud(TouchObserverHud* hud) {
     return hud->widget_;
   }

   int64_t internal_display_id_;
   int64_t external_display_id_;
   int64_t mirrored_display_id_;
   display::ManagedDisplayInfo internal_display_info_;
   display::ManagedDisplayInfo external_display_info_;
   display::ManagedDisplayInfo mirrored_display_info_;

   std::vector<display::ManagedDisplayInfo> display_info_list_;

   DISALLOW_COPY_AND_ASSIGN(TouchHudTestBase);
 };

 class TouchHudDebugTest : public TouchHudTestBase {
  public:
   TouchHudDebugTest() = default;
   ~TouchHudDebugTest() override = default;

   void SetUp() override {
     // Add ash-touch-hud flag to enable debug touch HUD. This flag should be set
     // before Ash environment is set up, i.e., before TouchHudTestBase::SetUp().
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         ash::switches::kAshTouchHud);

     TouchHudTestBase::SetUp();
   }

   void CheckInternalDisplay() {
     EXPECT_NE(nullptr, GetInternalTouchHudDebug());
     EXPECT_EQ(internal_display_id(), GetInternalTouchHudDebug()->display_id());
     EXPECT_EQ(GetInternalRootWindow(),
               GetRootWindowForTouchHud(GetInternalTouchHudDebug()));
     EXPECT_EQ(GetInternalRootWindow(),
               GetWidgetForTouchHud(GetInternalTouchHudDebug())
                   ->GetNativeView()
                   ->GetRootWindow());
     EXPECT_EQ(GetInternalDisplay().size(),
               GetWidgetForTouchHud(GetInternalTouchHudDebug())
                   ->GetWindowBoundsInScreen()
                   .size());
   }

   void CheckExternalDisplay() {
     EXPECT_NE(nullptr, GetExternalTouchHudDebug());
     EXPECT_EQ(external_display_id(), GetExternalTouchHudDebug()->display_id());
     EXPECT_EQ(GetExternalRootWindow(),
               GetRootWindowForTouchHud(GetExternalTouchHudDebug()));
     EXPECT_EQ(GetExternalRootWindow(),
               GetWidgetForTouchHud(GetExternalTouchHudDebug())
                   ->GetNativeView()
                   ->GetRootWindow());
     EXPECT_EQ(GetExternalDisplay().size(),
               GetWidgetForTouchHud(GetExternalTouchHudDebug())
                   ->GetWindowBoundsInScreen()
                   .size());
   }

  private:
   TouchHudDebug* GetInternalTouchHudDebug() {
     return GetInternalRootController()->touch_hud_debug();
   }

   TouchHudDebug* GetExternalTouchHudDebug() {
     return GetExternalRootController()->touch_hud_debug();
   }

   TouchHudDebug* GetPrimaryTouchHudDebug() {
     return GetPrimaryRootController()->touch_hud_debug();
   }

   TouchHudDebug* GetSecondaryTouchHudDebug() {
     return GetSecondaryRootController()->touch_hud_debug();
   }

   DISALLOW_COPY_AND_ASSIGN(TouchHudDebugTest);
 };

 class TouchHudProjectionTest : public TouchHudTestBase {
  public:
   TouchHudProjectionTest() = default;
   ~TouchHudProjectionTest() override = default;

   // testing::Test:
   void SetUp() override {
     base::CommandLine::ForCurrentProcess()->AppendSwitch(switches::kShowTaps);
     TouchHudTestBase::SetUp();
   }

   TouchHudProjection* GetInternalTouchHudProjection() {
     return GetInternalRootController()->touch_hud_projection();
   }

   int GetInternalTouchPointsCount() {
     return GetInternalTouchHudProjection()->touch_hud_renderer_->points_.size();
   }

   void SendTouchEventToInternalHud(ui::EventType type,
                                    const gfx::Point& location,
                                    int touch_id) {
     ui::TouchEvent event(
         type, location, event_time,
         ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, touch_id));
     GetInternalTouchHudProjection()->OnTouchEvent(&event);

     // Advance time for next event.
     event_time += base::TimeDelta::FromMilliseconds(100);
   }

  private:
   base::TimeTicks event_time;

   DISALLOW_COPY_AND_ASSIGN(TouchHudProjectionTest);
 };

 // Checks if debug touch HUD is correctly initialized for a single display.
 TEST_F(TouchHudDebugTest, SingleDisplay) {
   // Setup a single display setting.
   SetupSingleDisplay();

   // Check if touch HUD is set correctly and associated with appropriate
   // display.
   CheckInternalDisplay();
 }

 // Checks if debug touch HUDs are correctly initialized for two displays.
 TEST_F(TouchHudDebugTest, DualDisplays) {
   // Setup a dual display setting.
   SetupDualDisplays();

   // Check if touch HUDs are set correctly and associated with appropriate
   // displays.
   CheckInternalDisplay();
   CheckExternalDisplay();
 }

 // Checks if debug touch HUDs are correctly handled when primary display is
 // changed.
 TEST_F(TouchHudDebugTest, SwapPrimaryDisplay) {
   // Setup a dual display setting.
   SetupDualDisplays();

   // Set the primary display to the external one.
   SetExternalAsPrimary();

   // Check if displays' touch HUDs are not swapped as root windows are.
   EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
   EXPECT_EQ(internal_display_id(),
             display_manager()->GetSecondaryDisplay().id());
   CheckInternalDisplay();
   CheckExternalDisplay();

   // Set the primary display back to the internal one.
   SetInternalAsPrimary();

   // Check if displays' touch HUDs are not swapped back as root windows are.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   EXPECT_EQ(external_display_id(),
             display_manager()->GetSecondaryDisplay().id());
   CheckInternalDisplay();
   CheckExternalDisplay();
 }

 // Checks if debug touch HUDs are correctly handled when displays are mirrored.
 TEST_F(TouchHudDebugTest, MirrorDisplays) {
   // Disable restoring mirror mode to prevent interference from previous
   // display configuration.
   display_manager()->set_disable_restoring_mirror_mode_for_test(true);

   // Setup a dual display setting.
   SetupDualDisplays();

   // Mirror displays.
   MirrorDisplays();

   // Check if the internal display is intact.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   CheckInternalDisplay();

   // Unmirror displays.
   UnmirrorDisplays();

   // Check if external display is added back correctly.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   EXPECT_EQ(external_display_id(),
             display_manager()->GetSecondaryDisplay().id());
   CheckInternalDisplay();
   CheckExternalDisplay();

   display_manager()->set_disable_restoring_mirror_mode_for_test(false);
 }

 // Checks if debug touch HUDs are correctly handled when displays are mirrored
 // after setting the external display as the primary one.
 TEST_F(TouchHudDebugTest, SwapPrimaryThenMirrorDisplays) {
   display_manager()->set_disable_restoring_mirror_mode_for_test(true);

   // Setup a dual display setting.
   SetupDualDisplays();

   // Set the primary display to the external one.
   SetExternalAsPrimary();

   // Mirror displays.
   MirrorDisplays();

   // Check if the internal display is set as the primary one.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   CheckInternalDisplay();

   // Unmirror displays.
   UnmirrorDisplays();

   // Check if the external display is added back as the primary display and
   // touch HUDs are set correctly.
   EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
   EXPECT_EQ(internal_display_id(),
             display_manager()->GetSecondaryDisplay().id());
   CheckInternalDisplay();
   CheckExternalDisplay();

   display_manager()->set_disable_restoring_mirror_mode_for_test(false);
 }

 // Checks if debug touch HUDs are correctly handled when the external display,
 // which is the secondary one, is removed.
 TEST_F(TouchHudDebugTest, RemoveSecondaryDisplay) {
   // Setup a dual display setting.
   SetupDualDisplays();

   // Remove external display which is the secondary one.
   RemoveExternalDisplay();

   // Check if the internal display is intact.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   CheckInternalDisplay();

   // Add external display back.
   AddExternalDisplay();

   // Check if displays' touch HUDs are set correctly.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   EXPECT_EQ(external_display_id(),
             display_manager()->GetSecondaryDisplay().id());
   CheckInternalDisplay();
   CheckExternalDisplay();
 }

 // Checks if debug touch HUDs are correctly handled when the external display,
 // which is set as the primary display, is removed.
 TEST_F(TouchHudDebugTest, RemovePrimaryDisplay) {
   // Setup a dual display setting.
   SetupDualDisplays();

   // Set the primary display to the external one.
   SetExternalAsPrimary();

   // Remove the external display which is the primary display.
   RemoveExternalDisplay();

   // Check if the internal display is set as the primary one.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   CheckInternalDisplay();

   // Add the external display back.
   AddExternalDisplay();

   // Check if the external display is set as primary and touch HUDs are set
   // correctly.
   EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
   EXPECT_EQ(internal_display_id(),
             display_manager()->GetSecondaryDisplay().id());
   CheckInternalDisplay();
   CheckExternalDisplay();
 }

 // Checks if debug touch HUDs are correctly handled when all displays are
 // removed.
 TEST_F(TouchHudDebugTest, Headless) {
   // Setup a single display setting.
   SetupSingleDisplay();

   // Remove the only display which is the internal one.
   RemoveInternalDisplay();

   // Add the internal display back.
   AddInternalDisplay();

   // Check if the display's touch HUD is set correctly.
   EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
   CheckInternalDisplay();
 }

 // Checks projection touch HUD with a sequence of touch-pressed, touch-moved,
 // and touch-released events.
 // Test if the WM sets correct work area under different density.
 TEST_F(TouchHudProjectionTest, TouchMoveRelease) {
   SetupSingleDisplay();
   EXPECT_NE(static_cast<TouchHudProjection*>(nullptr),
             GetInternalTouchHudProjection());
   EXPECT_EQ(0, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(10, 20), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_RELEASED, gfx::Point(10, 20), 1);
   EXPECT_EQ(0, GetInternalTouchPointsCount());
 }

 // Checks projection touch HUD with a sequence of touch-pressed, touch-moved,
 // and touch-cancelled events.
 TEST_F(TouchHudProjectionTest, TouchMoveCancel) {
   SetupSingleDisplay();
   EXPECT_NE(static_cast<TouchHudProjection*>(NULL),
             GetInternalTouchHudProjection());
   EXPECT_EQ(0, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(10, 20), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_CANCELLED, gfx::Point(10, 20), 1);
   EXPECT_EQ(0, GetInternalTouchPointsCount());
 }

 // Checks projection touch HUD with two simultaneous touches.
 TEST_F(TouchHudProjectionTest, DoubleTouch) {
   SetupSingleDisplay();
   EXPECT_NE(static_cast<TouchHudProjection*>(NULL),
             GetInternalTouchHudProjection());
   EXPECT_EQ(0, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(20, 10), 2);
   EXPECT_EQ(2, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(10, 20), 1);
   EXPECT_EQ(2, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(20, 20), 2);
   EXPECT_EQ(2, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_RELEASED, gfx::Point(10, 20), 1);
   EXPECT_EQ(1, GetInternalTouchPointsCount());

   SendTouchEventToInternalHud(ui::ET_TOUCH_RELEASED, gfx::Point(20, 20), 2);
   EXPECT_EQ(0, GetInternalTouchPointsCount());
 }

 }  // namespace ash
	// Copyright (c) 2013 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/touch/touch_observer_hud.h"

	#include "ash/public/cpp/ash_switches.h"
	#include "ash/root_window_controller.h"
	#include "ash/shell.h"
	#include "ash/test/ash_test_base.h"
	#include "ash/touch/touch_devices_controller.h"
	#include "ash/touch/touch_hud_debug.h"
	#include "ash/touch/touch_hud_projection.h"
	#include "ash/touch/touch_hud_renderer.h"
	#include "base/command_line.h"
	#include "base/format_macros.h"
	#include "base/strings/stringprintf.h"
	#include "ui/aura/window.h"
	#include "ui/display/manager/display_manager.h"
	#include "ui/display/test/display_manager_test_api.h"
	#include "ui/views/widget/widget.h"

	namespace ash {

	class TouchHudTestBase : public AshTestBase {
	public:
	TouchHudTestBase() = default;
	~TouchHudTestBase() override = default;

	void SetUp() override {
	AshTestBase::SetUp();

	// Initialize display infos. They should be initialized after Ash
	// environment is set up, i.e., after AshTestBase::SetUp().
	internal_display_id_ =
	display::test::DisplayManagerTestApi(Shell::Get()->display_manager())
	.SetFirstDisplayAsInternalDisplay();
	external_display_id_ = 10;
	mirrored_display_id_ = 11;

	internal_display_info_ =
	CreateDisplayInfo(internal_display_id_, gfx::Rect(0, 0, 500, 500));
	external_display_info_ =
	CreateDisplayInfo(external_display_id_, gfx::Rect(1, 1, 100, 100));
	mirrored_display_info_ =
	CreateDisplayInfo(mirrored_display_id_, gfx::Rect(0, 0, 100, 100));
	}

	display::Display GetPrimaryDisplay() {
	return display::Screen::GetScreen()->GetPrimaryDisplay();
	}

	void SetupSingleDisplay() {
	display_info_list_.clear();
	display_info_list_.push_back(internal_display_info_);
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void SetupDualDisplays() {
	display_info_list_.clear();
	display_info_list_.push_back(internal_display_info_);
	display_info_list_.push_back(external_display_info_);
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void SetInternalAsPrimary() {
	GetWindowTreeHostManager()->SetPrimaryDisplayId(internal_display_id_);
	}

	void SetExternalAsPrimary() {
	GetWindowTreeHostManager()->SetPrimaryDisplayId(external_display_id_);
	}

	void MirrorDisplays() {
	DCHECK_EQ(2U, display_info_list_.size());
	DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
	DCHECK_EQ(external_display_id_, display_info_list_[1].id());
	display_info_list_[1] = mirrored_display_info_;
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void UnmirrorDisplays() {
	DCHECK_EQ(2U, display_info_list_.size());
	DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
	DCHECK_EQ(mirrored_display_id_, display_info_list_[1].id());
	display_info_list_[1] = external_display_info_;
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void RemoveInternalDisplay() {
	DCHECK_LT(0U, display_info_list_.size());
	DCHECK_EQ(internal_display_id_, display_info_list_[0].id());
	display_info_list_.erase(display_info_list_.begin());
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void RemoveExternalDisplay() {
	DCHECK_EQ(2U, display_info_list_.size());
	display_info_list_.pop_back();
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void AddInternalDisplay() {
	DCHECK_EQ(0U, display_info_list_.size());
	display_info_list_.push_back(internal_display_info_);
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	void AddExternalDisplay() {
	DCHECK_EQ(1U, display_info_list_.size());
	display_info_list_.push_back(external_display_info_);
	display_manager()->OnNativeDisplaysChanged(display_info_list_);
	}

	int64_t internal_display_id() const { return internal_display_id_; }

	int64_t external_display_id() const { return external_display_id_; }

	protected:

	WindowTreeHostManager* GetWindowTreeHostManager() {
	return Shell::Get()->window_tree_host_manager();
	}

	const display::Display& GetInternalDisplay() {
	return display_manager()->GetDisplayForId(internal_display_id_);
	}

	const display::Display& GetExternalDisplay() {
	return display_manager()->GetDisplayForId(external_display_id_);
	}

	aura::Window* GetInternalRootWindow() {
	return Shell::GetRootWindowForDisplayId(internal_display_id_);
	}

	aura::Window* GetExternalRootWindow() {
	return Shell::GetRootWindowForDisplayId(external_display_id_);
	}

	aura::Window* GetPrimaryRootWindow() {
	const display::Display& display = GetPrimaryDisplay();
	return Shell::GetRootWindowForDisplayId(display.id());
	}

	aura::Window* GetSecondaryRootWindow() {
	const display::Display& display = display_manager()->GetSecondaryDisplay();
	return Shell::GetRootWindowForDisplayId(display.id());
	}

	RootWindowController* GetInternalRootController() {
	aura::Window* root = GetInternalRootWindow();
	return RootWindowController::ForWindow(root);
	}

	RootWindowController* GetExternalRootController() {
	aura::Window* root = GetExternalRootWindow();
	return RootWindowController::ForWindow(root);
	}

	RootWindowController* GetPrimaryRootController() {
	aura::Window* root = GetPrimaryRootWindow();
	return RootWindowController::ForWindow(root);
	}

	RootWindowController* GetSecondaryRootController() {
	aura::Window* root = GetSecondaryRootWindow();
	return RootWindowController::ForWindow(root);
	}

	display::ManagedDisplayInfo CreateDisplayInfo(int64_t id,
	const gfx::Rect& bounds) {
	display::ManagedDisplayInfo info(id, base::StringPrintf("x-%" PRId64, id),
	false);
	info.SetBounds(bounds);
	return info;
	}

	aura::Window* GetRootWindowForTouchHud(TouchObserverHud* hud) {
	return hud->root_window_;
	}

	views::Widget* GetWidgetForTouchHud(TouchObserverHud* hud) {
	return hud->widget_;
	}

	int64_t internal_display_id_;
	int64_t external_display_id_;
	int64_t mirrored_display_id_;
	display::ManagedDisplayInfo internal_display_info_;
	display::ManagedDisplayInfo external_display_info_;
	display::ManagedDisplayInfo mirrored_display_info_;

	std::vector<display::ManagedDisplayInfo> display_info_list_;

	DISALLOW_COPY_AND_ASSIGN(TouchHudTestBase);
	};

	class TouchHudDebugTest : public TouchHudTestBase {
	public:
	TouchHudDebugTest() = default;
	~TouchHudDebugTest() override = default;

	void SetUp() override {
	// Add ash-touch-hud flag to enable debug touch HUD. This flag should be set
	// before Ash environment is set up, i.e., before TouchHudTestBase::SetUp().
	base::CommandLine::ForCurrentProcess()->AppendSwitch(
	ash::switches::kAshTouchHud);

	TouchHudTestBase::SetUp();
	}

	void CheckInternalDisplay() {
	EXPECT_NE(nullptr, GetInternalTouchHudDebug());
	EXPECT_EQ(internal_display_id(), GetInternalTouchHudDebug()->display_id());
	EXPECT_EQ(GetInternalRootWindow(),
	GetRootWindowForTouchHud(GetInternalTouchHudDebug()));
	EXPECT_EQ(GetInternalRootWindow(),
	GetWidgetForTouchHud(GetInternalTouchHudDebug())
	->GetNativeView()
	->GetRootWindow());
	EXPECT_EQ(GetInternalDisplay().size(),
	GetWidgetForTouchHud(GetInternalTouchHudDebug())
	->GetWindowBoundsInScreen()
	.size());
	}

	void CheckExternalDisplay() {
	EXPECT_NE(nullptr, GetExternalTouchHudDebug());
	EXPECT_EQ(external_display_id(), GetExternalTouchHudDebug()->display_id());
	EXPECT_EQ(GetExternalRootWindow(),
	GetRootWindowForTouchHud(GetExternalTouchHudDebug()));
	EXPECT_EQ(GetExternalRootWindow(),
	GetWidgetForTouchHud(GetExternalTouchHudDebug())
	->GetNativeView()
	->GetRootWindow());
	EXPECT_EQ(GetExternalDisplay().size(),
	GetWidgetForTouchHud(GetExternalTouchHudDebug())
	->GetWindowBoundsInScreen()
	.size());
	}

	private:
	TouchHudDebug* GetInternalTouchHudDebug() {
	return GetInternalRootController()->touch_hud_debug();
	}

	TouchHudDebug* GetExternalTouchHudDebug() {
	return GetExternalRootController()->touch_hud_debug();
	}

	TouchHudDebug* GetPrimaryTouchHudDebug() {
	return GetPrimaryRootController()->touch_hud_debug();
	}

	TouchHudDebug* GetSecondaryTouchHudDebug() {
	return GetSecondaryRootController()->touch_hud_debug();
	}

	DISALLOW_COPY_AND_ASSIGN(TouchHudDebugTest);
	};

	class TouchHudProjectionTest : public TouchHudTestBase {
	public:
	TouchHudProjectionTest() = default;
	~TouchHudProjectionTest() override = default;

	// testing::Test:
	void SetUp() override {
	base::CommandLine::ForCurrentProcess()->AppendSwitch(switches::kShowTaps);
	TouchHudTestBase::SetUp();
	}

	TouchHudProjection* GetInternalTouchHudProjection() {
	return GetInternalRootController()->touch_hud_projection();
	}

	int GetInternalTouchPointsCount() {
	return GetInternalTouchHudProjection()->touch_hud_renderer_->points_.size();
	}

	void SendTouchEventToInternalHud(ui::EventType type,
	const gfx::Point& location,
	int touch_id) {
	ui::TouchEvent event(
	type, location, event_time,
	ui::PointerDetails(ui::EventPointerType::POINTER_TYPE_TOUCH, touch_id));
	GetInternalTouchHudProjection()->OnTouchEvent(&event);

	// Advance time for next event.
	event_time += base::TimeDelta::FromMilliseconds(100);
	}

	private:
	base::TimeTicks event_time;

	DISALLOW_COPY_AND_ASSIGN(TouchHudProjectionTest);
	};

	// Checks if debug touch HUD is correctly initialized for a single display.
	TEST_F(TouchHudDebugTest, SingleDisplay) {
	// Setup a single display setting.
	SetupSingleDisplay();

	// Check if touch HUD is set correctly and associated with appropriate
	// display.
	CheckInternalDisplay();
	}

	// Checks if debug touch HUDs are correctly initialized for two displays.
	TEST_F(TouchHudDebugTest, DualDisplays) {
	// Setup a dual display setting.
	SetupDualDisplays();

	// Check if touch HUDs are set correctly and associated with appropriate
	// displays.
	CheckInternalDisplay();
	CheckExternalDisplay();
	}

	// Checks if debug touch HUDs are correctly handled when primary display is
	// changed.
	TEST_F(TouchHudDebugTest, SwapPrimaryDisplay) {
	// Setup a dual display setting.
	SetupDualDisplays();

	// Set the primary display to the external one.
	SetExternalAsPrimary();

	// Check if displays' touch HUDs are not swapped as root windows are.
	EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
	EXPECT_EQ(internal_display_id(),
	display_manager()->GetSecondaryDisplay().id());
	CheckInternalDisplay();
	CheckExternalDisplay();

	// Set the primary display back to the internal one.
	SetInternalAsPrimary();

	// Check if displays' touch HUDs are not swapped back as root windows are.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	EXPECT_EQ(external_display_id(),
	display_manager()->GetSecondaryDisplay().id());
	CheckInternalDisplay();
	CheckExternalDisplay();
	}

	// Checks if debug touch HUDs are correctly handled when displays are mirrored.
	TEST_F(TouchHudDebugTest, MirrorDisplays) {
	// Disable restoring mirror mode to prevent interference from previous
	// display configuration.
	display_manager()->set_disable_restoring_mirror_mode_for_test(true);

	// Setup a dual display setting.
	SetupDualDisplays();

	// Mirror displays.
	MirrorDisplays();

	// Check if the internal display is intact.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	CheckInternalDisplay();

	// Unmirror displays.
	UnmirrorDisplays();

	// Check if external display is added back correctly.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	EXPECT_EQ(external_display_id(),
	display_manager()->GetSecondaryDisplay().id());
	CheckInternalDisplay();
	CheckExternalDisplay();

	display_manager()->set_disable_restoring_mirror_mode_for_test(false);
	}

	// Checks if debug touch HUDs are correctly handled when displays are mirrored
	// after setting the external display as the primary one.
	TEST_F(TouchHudDebugTest, SwapPrimaryThenMirrorDisplays) {
	display_manager()->set_disable_restoring_mirror_mode_for_test(true);

	// Setup a dual display setting.
	SetupDualDisplays();

	// Set the primary display to the external one.
	SetExternalAsPrimary();

	// Mirror displays.
	MirrorDisplays();

	// Check if the internal display is set as the primary one.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	CheckInternalDisplay();

	// Unmirror displays.
	UnmirrorDisplays();

	// Check if the external display is added back as the primary display and
	// touch HUDs are set correctly.
	EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
	EXPECT_EQ(internal_display_id(),
	display_manager()->GetSecondaryDisplay().id());
	CheckInternalDisplay();
	CheckExternalDisplay();

	display_manager()->set_disable_restoring_mirror_mode_for_test(false);
	}

	// Checks if debug touch HUDs are correctly handled when the external display,
	// which is the secondary one, is removed.
	TEST_F(TouchHudDebugTest, RemoveSecondaryDisplay) {
	// Setup a dual display setting.
	SetupDualDisplays();

	// Remove external display which is the secondary one.
	RemoveExternalDisplay();

	// Check if the internal display is intact.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	CheckInternalDisplay();

	// Add external display back.
	AddExternalDisplay();

	// Check if displays' touch HUDs are set correctly.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	EXPECT_EQ(external_display_id(),
	display_manager()->GetSecondaryDisplay().id());
	CheckInternalDisplay();
	CheckExternalDisplay();
	}

	// Checks if debug touch HUDs are correctly handled when the external display,
	// which is set as the primary display, is removed.
	TEST_F(TouchHudDebugTest, RemovePrimaryDisplay) {
	// Setup a dual display setting.
	SetupDualDisplays();

	// Set the primary display to the external one.
	SetExternalAsPrimary();

	// Remove the external display which is the primary display.
	RemoveExternalDisplay();

	// Check if the internal display is set as the primary one.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	CheckInternalDisplay();

	// Add the external display back.
	AddExternalDisplay();

	// Check if the external display is set as primary and touch HUDs are set
	// correctly.
	EXPECT_EQ(external_display_id(), GetPrimaryDisplay().id());
	EXPECT_EQ(internal_display_id(),
	display_manager()->GetSecondaryDisplay().id());
	CheckInternalDisplay();
	CheckExternalDisplay();
	}

	// Checks if debug touch HUDs are correctly handled when all displays are
	// removed.
	TEST_F(TouchHudDebugTest, Headless) {
	// Setup a single display setting.
	SetupSingleDisplay();

	// Remove the only display which is the internal one.
	RemoveInternalDisplay();

	// Add the internal display back.
	AddInternalDisplay();

	// Check if the display's touch HUD is set correctly.
	EXPECT_EQ(internal_display_id(), GetPrimaryDisplay().id());
	CheckInternalDisplay();
	}

	// Checks projection touch HUD with a sequence of touch-pressed, touch-moved,
	// and touch-released events.
	// Test if the WM sets correct work area under different density.
	TEST_F(TouchHudProjectionTest, TouchMoveRelease) {
	SetupSingleDisplay();
	EXPECT_NE(static_cast<TouchHudProjection*>(nullptr),
	GetInternalTouchHudProjection());
	EXPECT_EQ(0, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
	EXPECT_EQ(1, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(10, 20), 1);
	EXPECT_EQ(1, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_RELEASED, gfx::Point(10, 20), 1);
	EXPECT_EQ(0, GetInternalTouchPointsCount());
	}

	// Checks projection touch HUD with a sequence of touch-pressed, touch-moved,
	// and touch-cancelled events.
	TEST_F(TouchHudProjectionTest, TouchMoveCancel) {
	SetupSingleDisplay();
	EXPECT_NE(static_cast<TouchHudProjection*>(NULL),
	GetInternalTouchHudProjection());
	EXPECT_EQ(0, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
	EXPECT_EQ(1, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(10, 20), 1);
	EXPECT_EQ(1, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_CANCELLED, gfx::Point(10, 20), 1);
	EXPECT_EQ(0, GetInternalTouchPointsCount());
	}

	// Checks projection touch HUD with two simultaneous touches.
	TEST_F(TouchHudProjectionTest, DoubleTouch) {
	SetupSingleDisplay();
	EXPECT_NE(static_cast<TouchHudProjection*>(NULL),
	GetInternalTouchHudProjection());
	EXPECT_EQ(0, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(10, 10), 1);
	EXPECT_EQ(1, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_PRESSED, gfx::Point(20, 10), 2);
	EXPECT_EQ(2, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(10, 20), 1);
	EXPECT_EQ(2, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_MOVED, gfx::Point(20, 20), 2);
	EXPECT_EQ(2, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_RELEASED, gfx::Point(10, 20), 1);
	EXPECT_EQ(1, GetInternalTouchPointsCount());

	SendTouchEventToInternalHud(ui::ET_TOUCH_RELEASED, gfx::Point(20, 20), 2);
	EXPECT_EQ(0, GetInternalTouchPointsCount());
	}

	} // namespace ash