Enabled/disable touch screen in TabletPowerButtonController

ash/system/chromeos/power/tablet_power_button_controller_unittest.cc

 // Copyright 2016 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/chromeos/power/tablet_power_button_controller.h"
 
 #include <memory>
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/wm/maximize_mode/maximize_mode_controller.h"
 #include "ash/common/wm_shell.h"
 #include "ash/shell.h"
 #include "ash/test/ash_test_base.h"
 #include "ash/test/lock_state_controller_test_api.h"
+#include "ash/test/test_shell_delegate.h"
 #include "ash/wm/lock_state_controller.h"
 #include "ash/wm/power_button_controller.h"
 #include "base/command_line.h"
 #include "base/compiler_specific.h"
 #include "base/run_loop.h"
 #include "base/test/simple_test_tick_clock.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "chromeos/dbus/fake_power_manager_client.h"
 #include "ui/events/event.h"
 #include "ui/events/test/event_generator.h"
@@ skipping 28 matching lines @@
     base::CommandLine::ForCurrentProcess()->AppendSwitch(
         switches::kAshEnableTabletPowerButton);
     AshTestBase::SetUp();
 
     lock_state_controller_ = Shell::GetInstance()->lock_state_controller();
     tablet_controller_ = Shell::GetInstance()
                              ->power_button_controller()
                              ->tablet_power_button_controller_for_test();
     test_api_ = base::MakeUnique<TabletPowerButtonController::TestApi>(
         tablet_controller_);
+    shell_delegate_ =
+        static_cast<TestShellDelegate*>(WmShell::Get()->delegate());
     generator_ = &AshTestBase::GetEventGenerator();
     power_manager_client_->SendBrightnessChanged(kNonZeroBrightness, false);
     EXPECT_FALSE(GetBacklightsForcedOff());
   }
 
   void TearDown() override {
     generator_ = nullptr;
     AshTestBase::TearDown();
     chromeos::DBusThreadManager::Shutdown();
   }
@@ skipping 34 matching lines @@
     base::RunLoop().RunUntilIdle();
     return forced_off;
   }
 
   // Ownership is passed on to chromeos::DBusThreadManager.
   chromeos::FakePowerManagerClient* power_manager_client_;
 
   LockStateController* lock_state_controller_;      // Not owned.
   TabletPowerButtonController* tablet_controller_;  // Not owned.
   std::unique_ptr<TabletPowerButtonController::TestApi> test_api_;
+  TestShellDelegate* shell_delegate_;  // Not owned.
   ui::test::EventGenerator* generator_ = nullptr;
 
   DISALLOW_COPY_AND_ASSIGN(TabletPowerButtonControllerTest);
 };
 
 TEST_F(TabletPowerButtonControllerTest, LockScreenIfRequired) {
   Initialize(LoginStatus::USER);
   SetShouldLockScreenAutomatically(true);
   EXPECT_FALSE(GetLockedState());
 
@@ skipping 188 matching lines @@
   PressPowerButton();
   tablet_controller_->OnKeyEvent(&power_key_pressed);
   tablet_controller_->OnKeyEvent(&power_key_pressed);
   tablet_controller_->OnKeyEvent(&power_key_pressed);
   ReleasePowerButton();
   tablet_controller_->OnKeyEvent(&power_key_released);
   tablet_controller_->OnKeyEvent(&power_key_released);
   EXPECT_EQ(1, power_manager_client_->num_set_backlights_forced_off_calls());
 }
 
+// Tests that under (1) tablet power button pressed/released, (2) keyboard/mouse
+// events on laptop mode when screen is off, requesting/stopping backlights
+// forced off should also try to toggle touch screen.
+TEST_F(TabletPowerButtonControllerTest, ToggleTouchScreen) {
+  // Tests tablet power button.
+  EXPECT_TRUE(shell_delegate_->IsTouchscreenEnabled());
+  PressPowerButton();
+  ReleasePowerButton();
+  power_manager_client_->SendBrightnessChanged(0, false);
+  EXPECT_FALSE(shell_delegate_->IsTouchscreenEnabled());
+
+  PressPowerButton();
+  power_manager_client_->SendBrightnessChanged(kNonZeroBrightness, false);
+  ReleasePowerButton();
+  EXPECT_TRUE(shell_delegate_->IsTouchscreenEnabled());
+
+  // KeyEvent on laptop mode when screen is off.
+  PressPowerButton();
+  ReleasePowerButton();
+  power_manager_client_->SendBrightnessChanged(0, false);
+  EXPECT_TRUE(GetBacklightsForcedOff());
+  EXPECT_FALSE(shell_delegate_->IsTouchscreenEnabled());
+  generator_->PressKey(ui::VKEY_L, ui::EF_NONE);
+  power_manager_client_->SendBrightnessChanged(kNonZeroBrightness, false);
+  EXPECT_TRUE(shell_delegate_->IsTouchscreenEnabled());
+
+  // MouseEvent on laptop mode when screen is off.
+  PressPowerButton();
+  ReleasePowerButton();
+  power_manager_client_->SendBrightnessChanged(0, false);
+  EXPECT_TRUE(GetBacklightsForcedOff());
+  EXPECT_FALSE(shell_delegate_->IsTouchscreenEnabled());
+  generator_->MoveMouseBy(1, 1);
+  power_manager_client_->SendBrightnessChanged(kNonZeroBrightness, false);
+  EXPECT_TRUE(shell_delegate_->IsTouchscreenEnabled());
+}
+
 }  // namespace test
 }  // namespace ash