Moving input device hotplug event processing outside of ui/display

ash/touch/touchscreen_util_unittest.cc

+// Copyright 2014 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 <vector>
+
+#include "ash/display/display_info.h"
+#include "ash/touch/touchscreen_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/events/device_data_manager.h"
+#include "ui/events/device_hotplug_event_observer.h"
+
+namespace ash {
+
+class TouchscreenUtilTest : public testing::Test {
+ public:
+  TouchscreenUtilTest() {
+    ui::DeviceDataManager::CreateInstance();
+    device_delegate_ = ui::DeviceDataManager::GetInstance();
+  }
+  virtual ~TouchscreenUtilTest() {}
+
+  virtual void SetUp() OVERRIDE {
+    // Internal display will always match to internal touchscreen. If internal
+    // touchscreen can't be detected, it is then associated to a touch screen
+    // with matching size.
+    {
+      DisplayInfo display(1, std::string(), false);
+      DisplayMode mode(gfx::Size(1920, 1080), 60.0, false, true);
+      mode.native = true;
+      std::vector<DisplayMode> modes(1, mode);
+      display.set_display_modes(modes);
+      displays_.push_back(display);
+      gfx::Display::SetInternalDisplayId(1);
+    }
+
+    {
+      DisplayInfo display(2, std::string(), false);
+      DisplayMode mode(gfx::Size(800, 600), 60.0, false, true);
+      mode.native = true;
+      std::vector<DisplayMode> modes(1, mode);
+      display.set_display_modes(modes);
+      displays_.push_back(display);
+    }
+
+    // Display without native mode. Must not be matched to any touch screen.
+    {
+      DisplayInfo display(3, std::string(), false);
+      displays_.push_back(display);
+    }
+
+    {
+      DisplayInfo display(4, std::string(), false);
+      DisplayMode mode(gfx::Size(1024, 768), 60.0, false, true);
+      mode.native = true;
+      std::vector<DisplayMode> modes(1, mode);
+      display.set_display_modes(modes);
+      displays_.push_back(display);
+    }
+  }
+
+  virtual void TearDown() OVERRIDE {
+    displays_.clear();
+    device_delegate_->OnTouchscreenDevices(
+        std::vector<ui::TouchscreenDevice>());
+  }
+
+ protected:
+  std::vector<DisplayInfo> displays_;
+  ui::DeviceHotplugEventObserver* device_delegate_;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(TouchscreenUtilTest);
+};
+
+TEST_F(TouchscreenUtilTest, NoTouchscreens) {
+  AssociateTouchscreens(&displays_);
+
+  for (size_t i = 0; i < displays_.size(); ++i)
+    EXPECT_EQ(ui::TouchscreenDevice::kInvalidId,
+              displays_[i].touch_device_id());
+}
+
+TEST_F(TouchscreenUtilTest, OneToOneMapping) {
+  std::vector<ui::TouchscreenDevice> devices;
+  devices.push_back(ui::TouchscreenDevice(1, gfx::Size(800, 600), false));
+  devices.push_back(ui::TouchscreenDevice(2, gfx::Size(1024, 768), false));
+  device_delegate_->OnTouchscreenDevices(devices);
+
+  AssociateTouchscreens(&displays_);
+
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[0].touch_device_id());
+  EXPECT_EQ(1, displays_[1].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[2].touch_device_id());
+  EXPECT_EQ(2, displays_[3].touch_device_id());
+}
+
+TEST_F(TouchscreenUtilTest, MapToCorrectDisplaySize) {
+  std::vector<ui::TouchscreenDevice> devices;
+  devices.push_back(ui::TouchscreenDevice(2, gfx::Size(1024, 768), false));
+  device_delegate_->OnTouchscreenDevices(devices);
+
+  AssociateTouchscreens(&displays_);
+
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[0].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[1].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[2].touch_device_id());
+  EXPECT_EQ(2, displays_[3].touch_device_id());
+}
+
+TEST_F(TouchscreenUtilTest, MapWhenSizeDiffersByOne) {
+  std::vector<ui::TouchscreenDevice> devices;
+  devices.push_back(ui::TouchscreenDevice(1, gfx::Size(801, 600), false));
+  devices.push_back(ui::TouchscreenDevice(2, gfx::Size(1023, 768), false));
+  device_delegate_->OnTouchscreenDevices(devices);
+
+  AssociateTouchscreens(&displays_);
+
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[0].touch_device_id());
+  EXPECT_EQ(1, displays_[1].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[2].touch_device_id());
+  EXPECT_EQ(2, displays_[3].touch_device_id());
+}
+
+TEST_F(TouchscreenUtilTest, MapWhenSizesDoNotMatch) {
+  std::vector<ui::TouchscreenDevice> devices;
+  devices.push_back(ui::TouchscreenDevice(1, gfx::Size(1022, 768), false));
+  devices.push_back(ui::TouchscreenDevice(2, gfx::Size(802, 600), false));
+  device_delegate_->OnTouchscreenDevices(devices);
+
+  AssociateTouchscreens(&displays_);
+
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[0].touch_device_id());
+  EXPECT_EQ(1, displays_[1].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[2].touch_device_id());
+  EXPECT_EQ(2, displays_[3].touch_device_id());
+}
+
+TEST_F(TouchscreenUtilTest, MapInternalTouchscreen) {
+  std::vector<ui::TouchscreenDevice> devices;
+  devices.push_back(ui::TouchscreenDevice(1, gfx::Size(1920, 1080), false));
+  devices.push_back(ui::TouchscreenDevice(2, gfx::Size(9999, 888), true));
+  device_delegate_->OnTouchscreenDevices(devices);
+
+  AssociateTouchscreens(&displays_);
+
+  // Internal touchscreen is always mapped to internal display.
+  EXPECT_EQ(2, displays_[0].touch_device_id());
+  EXPECT_EQ(1, displays_[1].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[2].touch_device_id());
+  EXPECT_EQ(ui::TouchscreenDevice::kInvalidId, displays_[3].touch_device_id());
+}
+
+}  // namespace ash