Split cursor location from UserDisplayManager.

services/ui/ws/cursor_location_manager_unittest.cc

+// Copyright 2017 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 "services/ui/ws/cursor_location_manager.h"
+
+#include "base/atomicops.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/geometry/point.h"
+
+namespace ui {
+namespace ws {
+namespace test {
+namespace {
+
+gfx::Point Atomic32ToPoint(base::subtle::Atomic32 atomic) {
+  return gfx::Point(static_cast<int16_t>(atomic >> 16),
+                    static_cast<int16_t>(atomic & 0xFFFF));
+}
+
+}  // namespace
+
+TEST(CursorLocationManagerTest, PositiveCoordinates) {
+  const gfx::Point point(100, 150);
+
+  CursorLocationManager cursor_location_manager;
+  cursor_location_manager.OnMouseCursorLocationChanged(point);
+
+  base::subtle::Atomic32* cursor_location_memory = nullptr;
+  mojo::ScopedSharedBufferHandle handle =
+      cursor_location_manager.GetCursorLocationMemory();
+  mojo::ScopedSharedBufferMapping cursor_location_mapping =
+      handle->Map(sizeof(base::subtle::Atomic32));
+  ASSERT_TRUE(cursor_location_mapping);
+  cursor_location_memory =
+      reinterpret_cast<base::subtle::Atomic32*>(cursor_location_mapping.get());
+
+  base::subtle::Atomic32 location =
+      base::subtle::NoBarrier_Load(cursor_location_memory);
+  EXPECT_EQ(point, Atomic32ToPoint(location));
+}
+
+TEST(CursorLocationManagerTest, NegativeCoordinates) {
+  const gfx::Point point(-10, -11);
+
+  CursorLocationManager cursor_location_manager;
+  cursor_location_manager.OnMouseCursorLocationChanged(point);
+
+  base::subtle::Atomic32* cursor_location_memory = nullptr;
+  mojo::ScopedSharedBufferHandle handle =
+      cursor_location_manager.GetCursorLocationMemory();
+  mojo::ScopedSharedBufferMapping cursor_location_mapping =
+      handle->Map(sizeof(base::subtle::Atomic32));
+  ASSERT_TRUE(cursor_location_mapping);
+  cursor_location_memory =
+      reinterpret_cast<base::subtle::Atomic32*>(cursor_location_mapping.get());
+
+  base::subtle::Atomic32 location =
+      base::subtle::NoBarrier_Load(cursor_location_memory);
+  EXPECT_EQ(point, Atomic32ToPoint(location));
+}
+
+}  // namespace test
+}  // namespace ws
+}  // namespace ui