Add more tests for mouse rotation,scale&position after display change

ash/display/cursor_window_controller_unittest.cc

+// Copyright 2015 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/display/cursor_window_controller.h"
+
+#include "ash/display/display_controller.h"
+#include "ash/screen_util.h"
+#include "ash/shell.h"
+#include "ash/test/ash_test_base.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_tree_host.h"
+#include "ui/base/cursor/cursor.h"
+#include "ui/events/test/event_generator.h"
+#include "ui/gfx/display.h"
+#include "ui/wm/core/coordinate_conversion.h"
+
+namespace ash {
+
+class CursorWindowControllerTest : public test::AshTestBase {
+ public:
+  CursorWindowControllerTest() {}
+  ~CursorWindowControllerTest() override {}
+
+  // test::AshTestBase:
+  void SetUp() override {
+    AshTestBase::SetUp();
+    cursor_window_controller_ =
+        Shell::GetInstance()->display_controller()->cursor_window_controller();
+    cursor_window_controller_->SetCursorCompositingEnabled(true);
+  }
+
+  int GetCursorType() const { return cursor_window_controller_->cursor_type_; }
+
+  const gfx::Point& GetCursorHotPoint() const {
+    return cursor_window_controller_->hot_point_;
+  }
+
+  aura::Window* GetCursorWindow() const {
+    return cursor_window_controller_->cursor_window_.get();
+  }
+
+  int64 GetCursorDisplayId() const {
+    return cursor_window_controller_->display_.id();
+  }
+
+ private:
+  // Not owned.
+  CursorWindowController* cursor_window_controller_;
+
+  DISALLOW_COPY_AND_ASSIGN(CursorWindowControllerTest);
+};
+
+// Test that the composited cursor moves to another display when the real cursor
+// moves to another display.
+TEST_F(CursorWindowControllerTest, MoveToDifferentDisplay) {
+  if (!SupportsMultipleDisplays())
+    return;
+
+  UpdateDisplay("200x200,200x200*2/r");
+
+  DisplayController* display_controller =
+      Shell::GetInstance()->display_controller();
+  int64 primary_display_id = display_controller->GetPrimaryDisplayId();
+  int64 secondary_display_id = ScreenUtil::GetSecondaryDisplay().id();
+  aura::Window* primary_root =
+      display_controller->GetRootWindowForDisplayId(primary_display_id);
+  aura::Window* secondary_root =
+      display_controller->GetRootWindowForDisplayId(secondary_display_id);
+
+  ui::test::EventGenerator primary_generator(primary_root);
+  primary_generator.MoveMouseToInHost(20, 50);
+
+  EXPECT_TRUE(primary_root->Contains(GetCursorWindow()));
+  EXPECT_EQ(primary_display_id, GetCursorDisplayId());
+  EXPECT_EQ(ui::kCursorNull, GetCursorType());
+  gfx::Point hot_point = GetCursorHotPoint();
+  EXPECT_EQ("4,4", hot_point.ToString());
+  gfx::Rect cursor_bounds = GetCursorWindow()->GetBoundsInScreen();
+  EXPECT_EQ(20, cursor_bounds.x() + hot_point.x());
+  EXPECT_EQ(50, cursor_bounds.y() + hot_point.y());
+
+  // The cursor can only be moved between displays via
+  // WindowTreeHost::MoveCursorTo(). EventGenerator uses a hack to move the
+  // cursor between displays.
+  // Screen location: 220, 50
+  // Root location: 20, 50
+  secondary_root->MoveCursorTo(gfx::Point(20, 50));
+
+  // Chrome relies on WindowTreeHost::MoveCursorTo() dispatching a mouse move
+  // asynchronously. This is implemented in a platform specific way. Generate a
+  // fake mouse move instead of waiting.
+  gfx::Point new_cursor_position_in_host(20, 50);
+  secondary_root->GetHost()->ConvertPointToHost(&new_cursor_position_in_host);
+  ui::test::EventGenerator secondary_generator(secondary_root);
+  secondary_generator.MoveMouseToInHost(new_cursor_position_in_host);
+
+  EXPECT_TRUE(secondary_root->Contains(GetCursorWindow()));
+  EXPECT_EQ(secondary_display_id, GetCursorDisplayId());
+  EXPECT_EQ(ui::kCursorNull, GetCursorType());
+  hot_point = GetCursorHotPoint();
+  EXPECT_EQ("8,9", hot_point.ToString());
+  cursor_bounds = GetCursorWindow()->GetBoundsInScreen();
+  EXPECT_EQ(220, cursor_bounds.x() + hot_point.x());
+  EXPECT_EQ(50, cursor_bounds.y() + hot_point.y());
+}
+
+}  // namespace ash