views/mus: Add a test to verify that Widget receives events correctly.

ui/views/mus/native_widget_mus_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 "ui/views/mus/native_widget_mus.h"
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "components/mus/public/cpp/property_type_converters.h"
+#include "components/mus/public/cpp/tests/window_tree_client_impl_private.h"
 #include "components/mus/public/cpp/window.h"
 #include "components/mus/public/cpp/window_property.h"
 #include "components/mus/public/cpp/window_tree_connection.h"
 #include "components/mus/public/interfaces/window_manager.mojom.h"
 #include "components/mus/public/interfaces/window_tree.mojom.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "third_party/skia/include/core/SkBitmap.h"
 #include "third_party/skia/include/core/SkColor.h"
 #include "ui/aura/window.h"
 #include "ui/events/event.h"
+#include "ui/events/test/test_event_handler.h"
 #include "ui/gfx/geometry/rect.h"
 #include "ui/gfx/image/image_skia.h"
 #include "ui/gfx/skia_util.h"
 #include "ui/views/controls/native/native_view_host.h"
 #include "ui/views/test/focus_manager_test.h"
 #include "ui/views/test/views_test_base.h"
 #include "ui/views/widget/widget.h"
 #include "ui/views/widget/widget_delegate.h"
 #include "ui/views/widget/widget_observer.h"
 #include "ui/wm/public/activation_client.h"
@@ skipping 326 matching lines @@
   // the Widget's window instead.
   focusable->RequestFocus();
   EXPECT_FALSE(window->HasFocus());
   EXPECT_TRUE(widget.GetNativeView()->HasFocus());
   active_window =
       aura::client::GetActivationClient(window.get()->GetRootWindow())
           ->GetActiveWindow();
   EXPECT_EQ(widget.GetNativeView(), active_window);
 }
 
+TEST_F(NativeWidgetMusTest, WidgetReceivesEvent) {
+  std::unique_ptr<Widget> widget(CreateWidget(nullptr));
+  widget->Show();
+
+  View* content = new HandleMousePressView;
+  content->SetBounds(10, 20, 90, 180);
+  widget->GetContentsView()->AddChildView(content);
+
+  ui::test::TestEventHandler handler;
+  content->AddPreTargetHandler(&handler);
+
+  std::unique_ptr<ui::MouseEvent> mouse = CreateMouseEvent();
+  NativeWidgetMus* native_widget =
+      static_cast<NativeWidgetMus*>(widget->native_widget_private());
+  mus::WindowTreeClientImplPrivate test_api(native_widget->window());
+  test_api.CallOnWindowInputEvent(native_widget->window(), *mouse);
+  EXPECT_EQ(1, handler.num_mouse_events());
+}
+
 // Tests that an incoming UI event is acked with the handled status.
 TEST_F(NativeWidgetMusTest, EventAcked) {
   std::unique_ptr<Widget> widget(CreateWidget(nullptr));
   widget->Show();
 
   View* content = new HandleMousePressView;
   content->SetBounds(10, 20, 90, 180);
   widget->GetContentsView()->AddChildView(content);
 
   // Dispatch an input event to the window and view.
@@ skipping 33 matching lines @@
 
   // The widget was deleted.
   EXPECT_FALSE(widget.get());
 
   // The test took ownership of the callback and called it.
   EXPECT_FALSE(ack_callback);
   EXPECT_EQ(1, ack_callback_count());
 }
 
 }  // namespace views