aura-mus: create an interactive ui test for drag and drop.

ui/views/mus/mus_client.h

 // 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.
 
 #ifndef UI_VIEWS_MUS_MUS_CLIENT_H_
 #define UI_VIEWS_MUS_MUS_CLIENT_H_
 
 #include <stdint.h>
 
 #include <map>
 #include <string>
 #include <vector>
 
 #include "base/macros.h"
 #include "services/service_manager/public/cpp/identity.h"
+#include "services/ui/public/interfaces/window_server_test.mojom.h"
 #include "ui/aura/client/capture_client.h"
 #include "ui/aura/mus/window_tree_client_delegate.h"
 #include "ui/views/mus/mus_export.h"
 #include "ui/views/mus/screen_mus_delegate.h"
 #include "ui/views/widget/widget.h"
 
 namespace aura {
 class PropertyConverter;
 class Window;
 class WindowTreeClient;
@@ skipping 21 matching lines @@
 class ScreenMus;
 
 namespace internal {
 class NativeWidgetDelegate;
 }
 
 namespace test {
 class MusClientTestApi;
 }
 
+enum MusClientTestingState { NO_TESTING, CREATE_TESTING_STATE };
+
 // MusClient establishes a connection to mus and sets up necessary state so that
 // aura and views target mus. This class is useful for typical clients, not the
 // WindowManager. Most clients don't create this directly, rather use AuraInit.
 class VIEWS_MUS_EXPORT MusClient : public aura::WindowTreeClientDelegate,
                                    public ScreenMusDelegate {
  public:
   // Most clients should use AuraInit, which creates a MusClient.
   // |create_wm_state| indicates whether MusClient should create a wm::WMState.
   MusClient(
       service_manager::Connector* connector,
       const service_manager::Identity& identity,
       scoped_refptr<base::SingleThreadTaskRunner> io_task_runner = nullptr,
-      bool create_wm_state = true);
+      bool create_wm_state = true,
+      MusClientTestingState testing_state = MusClientTestingState::NO_TESTING);
   ~MusClient() override;
 
   static MusClient* Get() { return instance_; }
   static bool Exists() { return instance_ != nullptr; }
 
   // Returns true if a DesktopNativeWidgetAura should be created given the
   // specified params. If this returns false a NativeWidgetAura should be
   // created.
   static bool ShouldCreateDesktopNativeWidgetAura(
       const Widget::InitParams& init_params);
@@ skipping 24 matching lines @@
   void OnCaptureClientUnset(aura::client::CaptureClient* capture_client);
 
   void AddObserver(MusClientObserver* observer);
   void RemoveObserver(MusClientObserver* observer);
 
   void SetMusPropertyMirror(std::unique_ptr<MusPropertyMirror> mirror);
   MusPropertyMirror* mus_property_mirror() {
     return mus_property_mirror_.get();
   }
 
+  // Returns an interface to directly control mus. Only available when created
+  // with MusClientTestingState::CREATE_TESTING_STATE.
+  ui::mojom::WindowServerTest* GetTestingInterface() const;
+
  private:
   friend class AuraInit;
   friend class test::MusClientTestApi;
 
   // Creates a DesktopWindowTreeHostMus. This is set as the factory function
   // ViewsDelegate such that if DesktopNativeWidgetAura is created without a
   // DesktopWindowTreeHost this is created.
   std::unique_ptr<DesktopWindowTreeHost> CreateDesktopWindowTreeHost(
       const Widget::InitParams& init_params,
       internal::NativeWidgetDelegate* delegate,
@@ skipping 26 matching lines @@
 
   std::unique_ptr<ScreenMus> screen_;
 
   std::unique_ptr<aura::PropertyConverter> property_converter_;
   std::unique_ptr<MusPropertyMirror> mus_property_mirror_;
 
   std::unique_ptr<aura::WindowTreeClient> window_tree_client_;
 
   std::unique_ptr<PointerWatcherEventRouter> pointer_watcher_event_router_;
 
+  ui::mojom::WindowServerTestPtr server_test_ptr_;
+
   DISALLOW_COPY_AND_ASSIGN(MusClient);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_MUS_MUS_CLIENT_H_