chromeos: Makes AshTestBase/Helper target mash when appropriate

ash/test/ash_test_helper.cc

Index: ash/test/ash_test_helper.cc
diff --git a/ash/test/ash_test_helper.cc b/ash/test/ash_test_helper.cc
index df2ebb668a441b84b4ba9cd42811d6aa085b2139..1508abf21cb0b2dfc609b8dc7d7566c24c5235f8 100644
--- a/ash/test/ash_test_helper.cc
+++ b/ash/test/ash_test_helper.cc
@@ -9,6 +9,10 @@
 #include "ash/common/test/test_system_tray_delegate.h"
 #include "ash/common/test/wm_shell_test_api.h"
 #include "ash/common/wm_shell.h"
+#include "ash/common/wm_window.h"
+#include "ash/mus/screen_mus.h"
+#include "ash/mus/window_manager.h"
+#include "ash/mus/window_manager_application.h"
 #include "ash/shell.h"
 #include "ash/shell_init_params.h"
 #include "ash/system/chromeos/screen_layout_observer.h"
@@ -19,20 +23,25 @@
 #include "ash/test/test_shell_delegate.h"
 #include "base/memory/ptr_util.h"
 #include "base/run_loop.h"
+#include "base/strings/string_split.h"
+#include "base/test/sequenced_worker_pool_owner.h"
 #include "chromeos/audio/cras_audio_handler.h"
 #include "chromeos/dbus/dbus_thread_manager.h"
 #include "device/bluetooth/bluetooth_adapter_factory.h"
 #include "device/bluetooth/dbus/bluez_dbus_manager.h"
 #include "ui/aura/env.h"
 #include "ui/aura/input_state_lookup.h"
+#include "ui/aura/mus/window_tree_client.h"
 #include "ui/aura/test/env_test_helper.h"
 #include "ui/aura/test/event_generator_delegate_aura.h"
+#include "ui/aura/test/mus/window_tree_client_private.h"
 #include "ui/base/ime/input_method_initializer.h"
 #include "ui/base/material_design/material_design_controller.h"
 #include "ui/base/platform_window_defaults.h"
 #include "ui/base/test/material_design_controller_test_api.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
 #include "ui/compositor/test/context_factories_for_test.h"
+#include "ui/display/manager/display_manager.h"
 #include "ui/display/manager/managed_display_info.h"
 #include "ui/display/test/display_manager_test_api.h"
 #include "ui/message_center/message_center.h"
@@ -40,8 +49,23 @@
 #include "ui/wm/core/cursor_manager.h"
 #include "ui/wm/core/wm_state.h"
 
+using display::ManagedDisplayInfo;
+
 namespace ash {
 namespace test {
+namespace {
+
+bool IsMash() {
+  return aura::Env::GetInstance()->mode() == aura::Env::Mode::MUS;
+}
+
+bool CompareByDisplayId(RootWindowController* root1,
+                        RootWindowController* root2) {
+  return root1->GetWindow()->GetDisplayNearestWindow().id() <
+         root2->GetWindow()->GetDisplayNearestWindow().id();
+}
+
+}  // namespace
 
 AshTestHelper::AshTestHelper(AshTestEnvironment* ash_test_environment)
     : ash_test_environment_(ash_test_environment),
@@ -57,7 +81,12 @@ AshTestHelper::~AshTestHelper() {}
 
 void AshTestHelper::SetUp(bool start_session) {
   display::ResetDisplayIdForTest();
-  wm_state_ = base::MakeUnique<::wm::WMState>();
+  const bool is_mash = IsMash();
+  if (is_mash)
+    aura::test::EnvTestHelper().SetAlwaysUseLastMouseLocation(true);
+  // WindowManager creates WMState for mash.
+  if (!is_mash)
+    wm_state_ = base::MakeUnique<::wm::WMState>();
   views_delegate_ = ash_test_environment_->CreateViewsDelegate();
 
   // Disable animations during tests.
@@ -65,38 +94,35 @@ void AshTestHelper::SetUp(bool start_session) {
       ui::ScopedAnimationDurationScaleMode::ZERO_DURATION));
   ui::InitializeInputMethodForTesting();
 
-  bool enable_pixel_output = false;
-  ui::ContextFactory* context_factory = nullptr;
-  ui::ContextFactoryPrivate* context_factory_private = nullptr;
-  ui::InitializeContextFactoryForTests(enable_pixel_output, &context_factory,
-                                       &context_factory_private);
-
   // Creates Shell and hook with Desktop.
   if (!test_shell_delegate_)
     test_shell_delegate_ = new TestShellDelegate;
 
-  // Creates MessageCenter since g_browser_process is not created in AshTestBase
-  // tests.
-  message_center::MessageCenter::Initialize();
-
-  // Create DBusThreadManager for testing.
-  if (!chromeos::DBusThreadManager::IsInitialized()) {
-    chromeos::DBusThreadManager::Initialize(
-        chromeos::DBusThreadManager::PROCESS_ASH);
-    dbus_thread_manager_initialized_ = true;
-  }
-
-  if (!bluez::BluezDBusManager::IsInitialized()) {
-    bluez::BluezDBusManager::Initialize(
-        chromeos::DBusThreadManager::Get()->GetSystemBus(),
-        chromeos::DBusThreadManager::Get()->IsUsingFakes());
-    bluez_dbus_manager_initialized_ = true;
+  if (!is_mash) {
+    // All of this initialization is done in WindowManagerApplication for mash.
+
+    // Creates MessageCenter since g_browser_process is not created in
+    // AshTestBase tests.
+    message_center::MessageCenter::Initialize();
+
+    if (!chromeos::DBusThreadManager::IsInitialized()) {
+      chromeos::DBusThreadManager::Initialize(
+          chromeos::DBusThreadManager::PROCESS_ASH);
+      dbus_thread_manager_initialized_ = true;
+    }
+
+    if (!bluez::BluezDBusManager::IsInitialized()) {
+      bluez::BluezDBusManager::Initialize(
+          chromeos::DBusThreadManager::Get()->GetSystemBus(),
+          chromeos::DBusThreadManager::Get()->IsUsingFakes());
+      bluez_dbus_manager_initialized_ = true;
+    }
+
+    // Create CrasAudioHandler for testing since g_browser_process is not
+    // created in AshTestBase tests.
+    chromeos::CrasAudioHandler::InitializeForTesting();
   }
 
-  // Create CrasAudioHandler for testing since g_browser_process is not
-  // created in AshTestBase tests.
-  chromeos::CrasAudioHandler::InitializeForTesting();
-
   ash_test_environment_->SetUp();
   // Reset the global state for the cursor manager. This includes the
   // last cursor visibility state, etc.
@@ -107,14 +133,13 @@ void AshTestHelper::SetUp(bool start_session) {
   ui::test::MaterialDesignControllerTestAPI::Uninitialize();
   ui::MaterialDesignController::Initialize();
 
-  ShellInitParams init_params;
-  init_params.delegate = test_shell_delegate_;
-  init_params.context_factory = context_factory;
-  init_params.context_factory_private = context_factory_private;
-  init_params.blocking_pool = ash_test_environment_->GetBlockingPool();
-  Shell::CreateInstance(init_params);
-  aura::test::EnvTestHelper(aura::Env::GetInstance())
-      .SetInputStateLookup(std::unique_ptr<aura::InputStateLookup>());
+  if (is_mash)
+    CreateMashWindowManager();
+  else
+    CreateShell();
+
+  aura::test::EnvTestHelper().SetInputStateLookup(
+      std::unique_ptr<aura::InputStateLookup>());
 
   Shell* shell = Shell::GetInstance();
   if (start_session) {
@@ -122,22 +147,35 @@ void AshTestHelper::SetUp(bool start_session) {
     GetTestSessionStateDelegate()->SetHasActiveUser(true);
   }
 
-  // Tests that change the display configuration generally don't care about the
-  // notifications and the popup UI can interfere with things like cursors.
-  shell->screen_layout_observer()->set_show_notifications_for_testing(false);
-
-  display::test::DisplayManagerTestApi(Shell::GetInstance()->display_manager())
-      .DisableChangeDisplayUponHostResize();
-  ShellTestApi(shell).DisableDisplayAnimator();
-
-  test_screenshot_delegate_ = new TestScreenshotDelegate();
-  shell->accelerator_controller_delegate()->SetScreenshotDelegate(
-      std::unique_ptr<ScreenshotDelegate>(test_screenshot_delegate_));
+  if (!is_mash) {
+    // ScreenLayoutObserver is specific to classic-ash.
+    // Tests that change the display configuration generally don't care about
+    // the notifications and the popup UI can interfere with things like
+    // cursors.
+    shell->screen_layout_observer()->set_show_notifications_for_testing(false);
+
+    // DisplayManager is specific to classic-ash.
+    display::test::DisplayManagerTestApi(
+        Shell::GetInstance()->display_manager())
+        .DisableChangeDisplayUponHostResize();
+    ShellTestApi(shell).DisableDisplayAnimator();
+
+    // TODO: disabled for mash as AcceleratorControllerDelegateAura isn't
+    // created in mash http://crbug.com/632111.
+    test_screenshot_delegate_ = new TestScreenshotDelegate();
+    shell->accelerator_controller_delegate()->SetScreenshotDelegate(
+        std::unique_ptr<ScreenshotDelegate>(test_screenshot_delegate_));
+  }
 }
 
 void AshTestHelper::TearDown() {
-  // Tear down the shell.
-  Shell::DeleteInstance();
+  window_manager_app_.reset();
+
+  const bool is_mash = IsMash();
+
+  // WindowManger owns the Shell in mash.
+  if (!is_mash)
+    Shell::DeleteInstance();
 
   // Suspend the tear down until all resources are returned via
   // MojoCompositorFrameSinkClient::ReclaimResources()
@@ -146,15 +184,19 @@ void AshTestHelper::TearDown() {
 
   test_screenshot_delegate_ = NULL;
 
-  // Remove global message center state.
-  message_center::MessageCenter::Shutdown();
+  if (!is_mash) {
+    // Remove global message center state.
+    message_center::MessageCenter::Shutdown();
+
+    chromeos::CrasAudioHandler::Shutdown();
+  }
 
-  chromeos::CrasAudioHandler::Shutdown();
   if (bluez_dbus_manager_initialized_) {
     device::BluetoothAdapterFactory::Shutdown();
     bluez::BluezDBusManager::Shutdown();
     bluez_dbus_manager_initialized_ = false;
   }
+
   if (dbus_thread_manager_initialized_) {
     chromeos::DBusThreadManager::Shutdown();
     dbus_thread_manager_initialized_ = false;
@@ -168,7 +210,8 @@ void AshTestHelper::TearDown() {
   views_delegate_.reset();
   wm_state_.reset();
 
-  CHECK(!::wm::CaptureController::Get());
+  // WindowManager owns the CaptureController for mash.
+  CHECK(is_mash || !::wm::CaptureController::Get());
 }
 
 void AshTestHelper::RunAllPendingInMessageLoop() {
@@ -191,5 +234,133 @@ aura::Window* AshTestHelper::CurrentContext() {
   return root_window;
 }
 
+void AshTestHelper::UpdateDisplayForMash(const std::string& display_spec) {
+  CHECK(IsMash());
+  const std::vector<std::string> parts = base::SplitString(
+      display_spec, ",", base::TRIM_WHITESPACE, base::SPLIT_WANT_ALL);
+  std::vector<RootWindowController*> root_window_controllers =
+      GetRootsOrderedByDisplayId();
+  int next_x = 0;
+  for (size_t i = 0,
+              end = std::min(parts.size(), root_window_controllers.size());
+       i < end; ++i) {
+    UpdateDisplay(root_window_controllers[i], parts[i], &next_x);
+  }
+  for (size_t i = root_window_controllers.size(); i < parts.size(); ++i) {
+    root_window_controllers.push_back(
+        CreateRootWindowController(parts[i], &next_x));
+  }
+  const bool in_shutdown = false;
+  while (root_window_controllers.size() > parts.size()) {
+    window_manager_app_->window_manager()->DestroyRootWindowController(
+        root_window_controllers.back(), in_shutdown);
+    root_window_controllers.pop_back();
+  }
+}
+
+display::Display AshTestHelper::GetSecondaryDisplay() {
+  if (!IsMash())
+    return Shell::GetInstance()->display_manager()->GetSecondaryDisplay();
+
+  std::vector<RootWindowController*> roots = GetRootsOrderedByDisplayId();
+  CHECK_LE(2U, roots.size());
+  return roots.size() < 2 ? display::Display()
+                          : roots[1]->GetWindow()->GetDisplayNearestWindow();
+}
+
+void AshTestHelper::CreateMashWindowManager() {
+  CHECK(IsMash());
+  window_manager_app_ = base::MakeUnique<mus::WindowManagerApplication>();
+
+  window_manager_app_->window_manager_.reset(new mus::WindowManager(nullptr));
+  window_manager_app_->window_manager()->shell_delegate_for_test_.reset(
+      test_shell_delegate_);
+  window_manager_app_->window_manager()
+      ->create_session_state_delegate_stub_for_test_ = false;
+
+  window_tree_client_setup_.InitForWindowManager(
+      window_manager_app_->window_manager_.get(),
+      window_manager_app_->window_manager_.get());
+  aura::test::EnvTestHelper().SetWindowTreeClient(
+      window_tree_client_setup_.window_tree_client());
+  window_manager_app_->InitWindowManager(
+      window_tree_client_setup_.OwnWindowTreeClient(),
+      ash_test_environment_->GetBlockingPool());
+
+  aura::WindowTreeClient* window_tree_client =
+      window_manager_app_->window_manager()->window_tree_client();
+  window_tree_client_private_ =
+      base::MakeUnique<aura::WindowTreeClientPrivate>(window_tree_client);
+  int next_x = 0;
+  CreateRootWindowController("800x600", &next_x);
+}
+
+void AshTestHelper::CreateShell() {
+  CHECK(!IsMash());
+  ui::ContextFactory* context_factory = nullptr;
+  ui::ContextFactoryPrivate* context_factory_private = nullptr;
+  bool enable_pixel_output = false;
+  ui::InitializeContextFactoryForTests(enable_pixel_output, &context_factory,
+                                       &context_factory_private);
+  ShellInitParams init_params;
+  init_params.delegate = test_shell_delegate_;
+  init_params.context_factory = context_factory;
+  init_params.context_factory_private = context_factory_private;
+  init_params.blocking_pool = ash_test_environment_->GetBlockingPool();
+  Shell::CreateInstance(init_params);
+}
+
+RootWindowController* AshTestHelper::CreateRootWindowController(
+    const std::string& display_spec,
+    int* next_x) {
+  ManagedDisplayInfo display_info =
+      ManagedDisplayInfo::CreateFromSpec(display_spec);
+  gfx::Rect bounds = display_info.bounds_in_native();
+  bounds.set_x(*next_x);
+  *next_x += bounds.size().width();
+  display::Display display(next_display_id_++, bounds);
+  display.set_device_scale_factor(display_info.device_scale_factor());
+  gfx::Rect work_area(bounds.size());
+  // Offset the height slightly to give a different work area. -20 is arbitrary,
+  // it could be anything.
+  work_area.set_height(std::max(0, work_area.height() - 20));
+  display.set_work_area(work_area);
+  window_tree_client_private_->CallWmNewDisplayAdded(display);
+  return GetRootsOrderedByDisplayId().back();
+}
+
+void AshTestHelper::UpdateDisplay(RootWindowController* root_window_controller,
+                                  const std::string& display_spec,
+                                  int* next_x) {
+  ManagedDisplayInfo display_info =
+      ManagedDisplayInfo::CreateFromSpec(display_spec);
+  gfx::Rect bounds = display_info.bounds_in_native();
+  bounds.set_x(*next_x);
+  *next_x += bounds.size().width();
+  display::Display updated_display =
+      root_window_controller->GetWindow()->GetDisplayNearestWindow();
+  gfx::Insets work_area_insets = updated_display.GetWorkAreaInsets();
+  updated_display.set_bounds(bounds);
+  updated_display.UpdateWorkAreaFromInsets(work_area_insets);
+  updated_display.set_device_scale_factor(display_info.device_scale_factor());
+  root_window_controller->GetWindow()->SetBounds(gfx::Rect(bounds.size()));
+  ScreenMus* screen = window_manager_app_->window_manager()->screen_.get();
+  const bool is_primary =
+      screen->display_list().FindDisplayById(updated_display.id()) ==
+      screen->display_list().GetPrimaryDisplayIterator();
+  screen->display_list().UpdateDisplay(
+      updated_display, is_primary ? display::DisplayList::Type::PRIMARY
+                                  : display::DisplayList::Type::NOT_PRIMARY);
+}
+
+std::vector<RootWindowController*> AshTestHelper::GetRootsOrderedByDisplayId() {
+  std::set<RootWindowController*> roots =
+      window_manager_app_->window_manager()->GetRootWindowControllers();
+  std::vector<RootWindowController*> ordered_roots;
+  ordered_roots.insert(ordered_roots.begin(), roots.begin(), roots.end());
+  std::sort(ordered_roots.begin(), ordered_roots.end(), &CompareByDisplayId);
+  return ordered_roots;
+}
+
 }  // namespace test
 }  // namespace ash