Tablet-like power button behavior on Convertible/Tablet ChromeOS devices

ash/wm/power_button_controller_unittest.cc

Index: ash/wm/power_button_controller_unittest.cc
diff --git a/ash/wm/power_button_controller_unittest.cc b/ash/wm/power_button_controller_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..9844d791af8db3d7969d93c0f6c754e5112ed6f9
--- /dev/null
+++ b/ash/wm/power_button_controller_unittest.cc
@@ -0,0 +1,223 @@
+// 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/wm/power_button_controller.h"
+
+#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/wm/lock_state_controller.h"
+#include "base/command_line.h"
+#include "chromeos/dbus/dbus_thread_manager.h"
+#include "chromeos/dbus/fake_power_manager_client.h"
+#include "ui/events/test/event_generator.h"
+
+namespace ash {
+namespace test {
+
+namespace {
+
+void CheckBoolEquals(bool result, bool expected) {
+  EXPECT_EQ(result, expected);
+}
+
+}  // namespace
+
+// For non-convertible/tablet device, power button controller test is
+// degenerated to lock state controller test.
+class TabletPowerButtonControllerTest : public AshTestBase {
+ public:
+  TabletPowerButtonControllerTest() {}
+  ~TabletPowerButtonControllerTest() override {}
+
+  void SetUp() override {
+    // This also initializes DBusThreadManager.
+    std::unique_ptr<chromeos::DBusThreadManagerSetter> dbus_setter =
+        chromeos::DBusThreadManager::GetSetterForTesting();
+    power_manager_client_ = new chromeos::FakePowerManagerClient();
+    dbus_setter->SetPowerManagerClient(base::WrapUnique(power_manager_client_));
+    base::CommandLine::ForCurrentProcess()->AppendSwitch(
+        switches::kAshEnableTouchViewTesting);
+    AshTestBase::SetUp();
+
+    lock_state_controller_ = Shell::GetInstance()->lock_state_controller();
+    power_button_controller_ = Shell::GetInstance()->power_button_controller();
+    test_api_ = base::MakeUnique<PowerButtonController::TestApi>(
+        power_button_controller_);
+    generator_ = &AshTestBase::GetEventGenerator();
+    CheckBacklightsForcedOff(false);
+  }
+
+  void TearDown() override {
+    generator_ = nullptr;
+    AshTestBase::TearDown();
+    chromeos::DBusThreadManager::Shutdown();
+  }
+
+ protected:
+  void PressPowerButton() {
+    power_button_controller_->OnPowerButtonEvent(true, base::TimeTicks::Now());
+  }
+
+  void ReleasePowerButton() {
+    power_button_controller_->OnPowerButtonEvent(false, base::TimeTicks::Now());
+  }
+
+  void SystemUnlocks() {
+    lock_state_controller_->OnLockStateChanged(false);
+    WmShell::Get()->GetSessionStateDelegate()->UnlockScreen();
+  }
+
+  void Initialize(LoginStatus status) {
+    lock_state_controller_->OnLoginStateChanged(status);
+    SetUserLoggedIn(status != LoginStatus::NOT_LOGGED_IN);
+    lock_state_controller_->OnLockStateChanged(false);
+  }
+
+  void EnableMaximizeMode(bool enabled) {
+    WmShell::Get()->maximize_mode_controller()->EnableMaximizeModeWindowManager(
+        enabled);
+  }
+
+  void CheckLockedState(bool expected_locked) {
+    EXPECT_EQ(WmShell::Get()->GetSessionStateDelegate()->IsScreenLocked(),
+              expected_locked);
+  }
+
+  void CheckBacklightsForcedOff(bool expected_forced_off) {
+    power_manager_client_->GetBacklightsForcedOff(
+        base::Bind(&CheckBoolEquals, expected_forced_off));
+  }
+
+  // Ownership is passed on to chromeos::DBusThreadManager.
+  chromeos::FakePowerManagerClient* power_manager_client_;
+  PowerButtonController* power_button_controller_;  // Not owned.
+  LockStateController* lock_state_controller_;      // Not owned.
+  std::unique_ptr<PowerButtonController::TestApi> test_api_;
+  ui::test::EventGenerator* generator_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(TabletPowerButtonControllerTest);
+};
+
+TEST_F(TabletPowerButtonControllerTest, LockScreenIfRequired) {
+  Initialize(LoginStatus::USER);
+  SetShouldLockScreenAutomatically(true);
+  CheckLockedState(false);
+
+  // On User logged in status, power-button-press-release should lock screen if
+  // should lock screen automatically.
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckLockedState(true);
+
+  // On locked state, power-button-press-release should do nothing.
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckLockedState(true);
+
+  // Unlock the sceen.
+  SystemUnlocks();
+  CheckLockedState(false);
+
+  // power-button-press-release should not lock the screen if should not lock
+  // screen automatically.
+  SetShouldLockScreenAutomatically(false);
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckLockedState(false);
+}
+
+// This test is to test the power button released is done before
+// |tablet_pre_start_shutdown_animation_timer_| is timeout.
+TEST_F(TabletPowerButtonControllerTest, QuickTapTest) {
+  PressPowerButton();
+  EXPECT_TRUE(test_api_->TabletPowerButtonTimerIsRunning());
+  CheckBacklightsForcedOff(false);
+  ReleasePowerButton();
+  EXPECT_FALSE(test_api_->TabletPowerButtonTimerIsRunning());
+  CheckBacklightsForcedOff(true);
+
+  PressPowerButton();
+  EXPECT_TRUE(test_api_->TabletPowerButtonTimerIsRunning());
+  CheckBacklightsForcedOff(false);
+  ReleasePowerButton();
+  EXPECT_FALSE(test_api_->TabletPowerButtonTimerIsRunning());
+  CheckBacklightsForcedOff(false);
+}
+
+// This test is to test the power button released is done after
+// |tablet_pre_start_shutdown_animation_timer_| is timeout.
+TEST_F(TabletPowerButtonControllerTest,
+       ReleasePowerButtonDuringShutdownAnimation) {
+  PressPowerButton();
+  test_api_->TriggerTabletPowerButtonTimeout();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(false);
+
+  // Set backlights forced off to true for the next test.
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(true);
+
+  PressPowerButton();
+  test_api_->TriggerTabletPowerButtonTimeout();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(false);
+}
+
+// When screen is turned off, even it is not set to forced off by power button
+// (can be caused by idle screen off, suspended), we should consider it as
+// "backlights forced off" to set backlights forced off state when tapping power
+// button.
+TEST_F(TabletPowerButtonControllerTest, TappingPowerButtonWhenScreenIsOff) {
+  power_button_controller_->OnScreenBrightnessChanged(0.0);
+  PressPowerButton();
+  CheckBacklightsForcedOff(false);
+  ReleasePowerButton();
+
+  CheckBacklightsForcedOff(false);
+  power_button_controller_->OnScreenBrightnessChanged(10.0);
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(true);
+}
+
+// For convertible device working on laptop mode, keyboard/mouse event
+// should SetBacklightsForcedOff(false) when screen is off.
+TEST_F(TabletPowerButtonControllerTest, ConvertibleOnLaptopMode) {
+  EnableMaximizeMode(false);
+
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(true);
+  generator_->PressKey(ui::VKEY_L, ui::EF_NONE);
+  CheckBacklightsForcedOff(false);
+
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(true);
+  generator_->MoveMouseBy(1, 1);
+  CheckBacklightsForcedOff(false);
+}
+
+// For convertible device working on tablet mode, keyboard/mouse event should
+// not SetBacklightsForcedOff(false) when screen is off.
+TEST_F(TabletPowerButtonControllerTest, ConvertibleOnMaximizeMode) {
+  EnableMaximizeMode(true);
+
+  PressPowerButton();
+  ReleasePowerButton();
+  CheckBacklightsForcedOff(true);
+  generator_->PressKey(ui::VKEY_L, ui::EF_NONE);
+  CheckBacklightsForcedOff(true);
+
+  generator_->MoveMouseBy(1, 1);
+  CheckBacklightsForcedOff(true);
+}
+
+}  // namespace test
+}  // namespace ash