ScreenWin Testability and Restructuring

ui/gfx/screen_win_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 "ui/gfx/screen_win.h"
 
+#include <windows.h>
+#include <inttypes.h>
+#include <stddef.h>
+
 #include <cwchar>
+#include <memory>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
-#include <windows.h>
-#include <stddef.h>
-
+#include "base/macros.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/gfx/display.h"
 #include "ui/gfx/geometry/rect.h"
+#include "ui/gfx/screen.h"
+#include "ui/gfx/test/display_util.h"
+#include "ui/gfx/win/display_info.h"
 #include "ui/gfx/win/dpi.h"
+#include "ui/gfx/win/screen_win_display.h"
 
 namespace gfx {
 
 namespace {
 
 MONITORINFOEX CreateMonitorInfo(gfx::Rect monitor,
                                 gfx::Rect work,
                                 std::wstring device_name) {
   MONITORINFOEX monitor_info;
   ::ZeroMemory(&monitor_info, sizeof(monitor_info));
   monitor_info.cbSize = sizeof(monitor_info);
   monitor_info.rcMonitor = monitor.ToRECT();
   monitor_info.rcWork = work.ToRECT();
   size_t device_char_count = ARRAYSIZE(monitor_info.szDevice);
   wcsncpy(monitor_info.szDevice, device_name.c_str(), device_char_count);
   monitor_info.szDevice[device_char_count-1] = L'\0';
   return monitor_info;
 }
 
+class TestScreenWin : public gfx::ScreenWin {
+ public:
+  TestScreenWin(const std::vector<gfx::win::DisplayInfo>& display_infos,
+                const std::vector<MONITORINFOEX>& monitor_infos,
+                const std::unordered_map<HWND, gfx::Rect>& hwnd_map)
+      : monitor_infos_(monitor_infos),
+        hwnd_map_(hwnd_map) {
+    UpdateFromDisplayInfos(display_infos);
+  }
+
+  ~TestScreenWin() = default;
+
+ protected:
+  // gfx::ScreenWin:
+  HWND GetHWNDFromNativeView(NativeView window) const override {
+    // NativeView is only used as an identifier in this tests, so interchange
+    // NativeView with an HWND for convenience.
+    return reinterpret_cast<HWND>(window);
+  }
+
+  NativeWindow GetNativeWindowFromHWND(HWND hwnd) const override {
+    // NativeWindow is only used as an identifier in this tests, so interchange
+    // an HWND for a NativeWindow for convenience.
+    return reinterpret_cast<NativeWindow>(hwnd);
+  }
+
+ private:
+  void Initialize() override {}
+
+  MONITORINFOEX MonitorInfoFromScreenPoint(const gfx::Point& screen_point) const
+      override {
+    for (const MONITORINFOEX& monitor_info : monitor_infos_) {
+      if (gfx::Rect(monitor_info.rcMonitor).Contains(screen_point))
+        return monitor_info;
+    }
+    NOTREACHED();
+    return monitor_infos_[0];
+  }
+
+  MONITORINFOEX MonitorInfoFromScreenRect(const gfx::Rect& screen_rect) const
+      override {
+    MONITORINFOEX candidate = monitor_infos_[0];
+    int largest_area = 0;
+    for (const MONITORINFOEX& monitor_info : monitor_infos_) {
+      gfx::Rect bounds(monitor_info.rcMonitor);
+      if (bounds.Intersects(screen_rect)) {
+        bounds.Intersect(screen_rect);
+        int area = bounds.height() * bounds.width();
+        if (largest_area < area) {
+          candidate = monitor_info;
+          largest_area = area;
+        }
+      }
+    }
+    EXPECT_NE(largest_area, 0);
+    return candidate;
+  }
+
+  MONITORINFOEX MonitorInfoFromWindow(HWND hwnd, DWORD default_options)
+      const override {
+    auto search = hwnd_map_.find(hwnd);
+    if (search != hwnd_map_.end())
+      return MonitorInfoFromScreenRect(search->second);
+
+    EXPECT_EQ(default_options, MONITOR_DEFAULTTOPRIMARY);
+    for (const auto& monitor_info : monitor_infos_) {
+      if (monitor_info.rcMonitor.left == 0 &&
+          monitor_info.rcMonitor.top == 0) {
+        return monitor_info;
+      }
+    }
+    NOTREACHED();
+    return monitor_infos_[0];
+  }
+
+  HWND GetRootWindow(HWND hwnd) const override {
+    return hwnd;
+  }
+
+  std::vector<MONITORINFOEX> monitor_infos_;
+  std::unordered_map<HWND, gfx::Rect> hwnd_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestScreenWin);
+};
+
+Screen* GetScreen() {
+  return gfx::Screen::GetScreen();
+}
+
 }  // namespace
 
+// Allows tests to specify the screen and associated state.
+class TestScreenWinInitializer {
+ public:
+  virtual void AddMonitor(const gfx::Rect& pixel_bounds,
+                          const gfx::Rect& pixel_work,
+                          const wchar_t* device_name,
+                          float device_scale_factor) = 0;
+
+  virtual HWND CreateFakeHwnd(const gfx::Rect& bounds) = 0;
+};
+
+class TestScreenWinManager : public TestScreenWinInitializer {
+ public:
+  TestScreenWinManager() = default;
+
+  ~TestScreenWinManager() {
+    gfx::Screen::SetScreenInstance(nullptr);
+  }
+
+  void AddMonitor(const gfx::Rect& pixel_bounds,
+                  const gfx::Rect& pixel_work,
+                  const wchar_t* device_name,
+                  float device_scale_factor) override {
+    MONITORINFOEX monitor_info = CreateMonitorInfo(pixel_bounds,
+                                                   pixel_work,
+                                                   device_name);
+    monitor_infos_.push_back(monitor_info);
+    display_infos_.push_back(gfx::win::DisplayInfo(monitor_info,
+                                                   device_scale_factor,
+                                                   gfx::Display::ROTATE_0));
+  }
+
+  HWND CreateFakeHwnd(const gfx::Rect& bounds) override {
+    EXPECT_EQ(screen_win_, nullptr);
+    hwnd_map_.insert(std::pair<HWND, gfx::Rect>(++hwndLast_, bounds));
+    return hwndLast_;
+  }
+
+  void InitializeScreenWin() {
+    ASSERT_EQ(screen_win_, nullptr);
+    screen_win_.reset(new TestScreenWin(display_infos_,
+                                        monitor_infos_,
+                                        hwnd_map_));
+    gfx::Screen::SetScreenInstance(screen_win_.get());
+  }
+
+  ScreenWin* GetScreenWin() {
+    return screen_win_.get();
+  }
+
+ private:
+  HWND hwndLast_ = nullptr;
+  scoped_ptr<ScreenWin> screen_win_;
+  std::vector<MONITORINFOEX> monitor_infos_;
+  std::vector<gfx::win::DisplayInfo> display_infos_;
+  std::unordered_map<HWND, gfx::Rect> hwnd_map_;
+
+  DISALLOW_COPY_AND_ASSIGN(TestScreenWinManager);
+};
+
 class ScreenWinTest : public testing::Test {
- private:
+ protected:
+  ScreenWinTest() = default;
+
   void SetUp() override {
     testing::Test::SetUp();
     gfx::SetDefaultDeviceScaleFactor(1.0);
+    screen_win_initializer_.reset(new TestScreenWinManager());
+    SetUpScreen(screen_win_initializer_.get());
+    screen_win_initializer_->InitializeScreenWin();
   }
 
   void TearDown() override {
+    screen_win_initializer_.reset();
     gfx::SetDefaultDeviceScaleFactor(1.0);
     testing::Test::TearDown();
   }
-};
-
-TEST_F(ScreenWinTest, SingleDisplay1x) {
-  std::vector<MONITORINFOEX> monitor_infos;
-  monitor_infos.push_back(CreateMonitorInfo(gfx::Rect(0, 0, 1920, 1200),
-                                            gfx::Rect(0, 0, 1920, 1100),
-                                            L"primary"));
-  std::vector<gfx::Display> displays =
-      ScreenWin::GetDisplaysForMonitorInfos(monitor_infos);
-
+
+  virtual void SetUpScreen(TestScreenWinInitializer* initializer) = 0;
+
+  NativeWindow GetNativeWindowFromHWND(HWND hwnd) const {
+    ScreenWin* screen_win = screen_win_initializer_->GetScreenWin();
+    return screen_win->GetNativeWindowFromHWND(hwnd);;
+  }
+
+ private:
+  scoped_ptr<TestScreenWinManager> screen_win_initializer_;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenWinTest);
+};
+
+// Single Display of 1.0 Device Scale Factor.
+class ScreenWinTestSingleDisplay1x : public ScreenWinTest {
+ public:
+  ScreenWinTestSingleDisplay1x() = default;
+
+  void SetUpScreen(TestScreenWinInitializer* initializer) override {
+    initializer->AddMonitor(gfx::Rect(0, 0, 1920, 1200),
+                            gfx::Rect(0, 0, 1920, 1100),
+                            L"primary",
+                            1.0);
+    fake_hwnd_ = initializer->CreateFakeHwnd(gfx::Rect(0, 0, 1920, 1100));
+  }
+
+  HWND GetFakeHwnd() {
+    return fake_hwnd_;
+  }
+
+ private:
+  HWND fake_hwnd_ = nullptr;
+};
+
+TEST_F(ScreenWinTestSingleDisplay1x, GetDisplays) {
+  std::vector<gfx::Display> displays = GetScreen()->GetAllDisplays();
   ASSERT_EQ(1u, displays.size());
   EXPECT_EQ(gfx::Rect(0, 0, 1920, 1200), displays[0].bounds());
   EXPECT_EQ(gfx::Rect(0, 0, 1920, 1100), displays[0].work_area());
 }
 
-TEST_F(ScreenWinTest, SingleDisplay2x) {
-  gfx::SetDefaultDeviceScaleFactor(2.0);
-
-  std::vector<MONITORINFOEX> monitor_infos;
-  monitor_infos.push_back(CreateMonitorInfo(gfx::Rect(0, 0, 1920, 1200),
-                                            gfx::Rect(0, 0, 1920, 1100),
-                                            L"primary"));
-  std::vector<gfx::Display> displays =
-      ScreenWin::GetDisplaysForMonitorInfos(monitor_infos);
-
+TEST_F(ScreenWinTestSingleDisplay1x, GetNumDisplays) {
+  EXPECT_EQ(1, GetScreen()->GetNumDisplays());
+}
+
+TEST_F(ScreenWinTestSingleDisplay1x, GetDisplayNearestWindowPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  EXPECT_EQ(screen->GetPrimaryDisplay(),
+            screen->GetDisplayNearestWindow(nullptr));
+}
+
+TEST_F(ScreenWinTestSingleDisplay1x, GetDisplayNearestWindow) {
+  gfx::Screen* screen = GetScreen();
+  gfx::NativeWindow native_window = GetNativeWindowFromHWND(GetFakeHwnd());
+  EXPECT_EQ(screen->GetAllDisplays()[0],
+            screen->GetDisplayNearestWindow(native_window));
+}
+
+TEST_F(ScreenWinTestSingleDisplay1x, GetDisplayNearestPoint) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display display = screen->GetAllDisplays()[0];
+  EXPECT_EQ(display, screen->GetDisplayNearestPoint(gfx::Point(0, 0)));
+  EXPECT_EQ(display, screen->GetDisplayNearestPoint(gfx::Point(250, 952)));
+  EXPECT_EQ(display, screen->GetDisplayNearestPoint(gfx::Point(1919, 1199)));
+}
+
+TEST_F(ScreenWinTestSingleDisplay1x, GetDisplayMatching) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display display = screen->GetAllDisplays()[0];
+  EXPECT_EQ(display, screen->GetDisplayMatching(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_EQ(display,
+            screen->GetDisplayMatching(gfx::Rect(1819, 1099, 100, 100)));
+}
+
+TEST_F(ScreenWinTestSingleDisplay1x, GetPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  EXPECT_EQ(gfx::Point(0, 0), screen->GetPrimaryDisplay().bounds().origin());
+}
+
+// Single Display of 2.0 Device Scale Factor.
+class ScreenWinTestSingleDisplay2x : public ScreenWinTest {
+ public:
+  ScreenWinTestSingleDisplay2x() = default;
+
+  void SetUpScreen(TestScreenWinInitializer* initializer) override {
+    gfx::SetDefaultDeviceScaleFactor(2.0);
+    initializer->AddMonitor(gfx::Rect(0, 0, 1920, 1200),
+                            gfx::Rect(0, 0, 1920, 1100),
+                            L"primary",
+                            2.0);
+    fake_hwnd_ = initializer->CreateFakeHwnd(gfx::Rect(0, 0, 1920, 1100));
+  }
+
+  HWND GetFakeHwnd() {
+    return fake_hwnd_;
+  }
+
+ private:
+  HWND fake_hwnd_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenWinTestSingleDisplay2x);
+};
+
+TEST_F(ScreenWinTestSingleDisplay2x, GetDisplays) {
+  std::vector<gfx::Display> displays = GetScreen()->GetAllDisplays();
   ASSERT_EQ(1u, displays.size());
   EXPECT_EQ(gfx::Rect(0, 0, 960, 600), displays[0].bounds());
   EXPECT_EQ(gfx::Rect(0, 0, 960, 550), displays[0].work_area());
 }
 
+TEST_F(ScreenWinTestSingleDisplay2x, GetDisplayNearestPoint) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display display = screen->GetAllDisplays()[0];
+  EXPECT_EQ(display, screen->GetDisplayNearestPoint(gfx::Point(0, 0)));
+  EXPECT_EQ(display, screen->GetDisplayNearestPoint(gfx::Point(125, 476)));
+  EXPECT_EQ(display, screen->GetDisplayNearestPoint(gfx::Point(959, 599)));
+}
+
+TEST_F(ScreenWinTestSingleDisplay2x, GetDisplayMatching) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display display = screen->GetAllDisplays()[0];
+  EXPECT_EQ(display, screen->GetDisplayMatching(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_EQ(display,
+            screen->GetDisplayMatching(gfx::Rect(1819, 1099, 100, 100)));
+}
+
+// Two Displays of 1.0 Device Scale Factor.
+class ScreenWinTestTwoDisplays1x : public ScreenWinTest {
+ public:
+  ScreenWinTestTwoDisplays1x() = default;
+
+  void SetUpScreen(TestScreenWinInitializer* initializer) override {
+    initializer->AddMonitor(gfx::Rect(0, 0, 1920, 1200),
+                            gfx::Rect(0, 0, 1920, 1100),
+                            L"primary",
+                            1.0);
+    initializer->AddMonitor(gfx::Rect(1920, 0, 800, 600),
+                            gfx::Rect(1920, 0, 800, 600),
+                            L"secondary",
+                            1.0);
+    fake_hwnd_left_ = initializer->CreateFakeHwnd(gfx::Rect(0, 0, 1920, 1100));
+    fake_hwnd_right_ =
+        initializer->CreateFakeHwnd(gfx::Rect(1920, 0, 800, 600));
+  }
+
+  HWND GetLeftFakeHwnd() {
+    return fake_hwnd_left_;
+  }
+
+  HWND GetRightFakeHwnd() {
+    return fake_hwnd_right_;
+  }
+
+ private:
+  HWND fake_hwnd_left_ = nullptr;
+  HWND fake_hwnd_right_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenWinTestTwoDisplays1x);
+};
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetDisplays) {
+  std::vector<gfx::Display> displays = GetScreen()->GetAllDisplays();
+  ASSERT_EQ(2u, displays.size());
+  EXPECT_EQ(gfx::Rect(0, 0, 1920, 1200), displays[0].bounds());
+  EXPECT_EQ(gfx::Rect(0, 0, 1920, 1100), displays[0].work_area());
+  EXPECT_EQ(gfx::Rect(1920, 0, 800, 600), displays[1].bounds());
+  EXPECT_EQ(gfx::Rect(1920, 0, 800, 600), displays[1].work_area());
+}
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetNumDisplays) {
+  EXPECT_EQ(2, GetScreen()->GetNumDisplays());
+}
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetDisplayNearestWindowPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  EXPECT_EQ(screen->GetPrimaryDisplay(),
+            screen->GetDisplayNearestWindow(nullptr));
+}
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetDisplayNearestWindow) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  gfx::NativeWindow left_window = GetNativeWindowFromHWND(GetLeftFakeHwnd());
+  EXPECT_EQ(left_display, screen->GetDisplayNearestWindow(left_window));
+
+  gfx::NativeWindow right_window = GetNativeWindowFromHWND(GetRightFakeHwnd());
+  EXPECT_EQ(right_display, screen->GetDisplayNearestWindow(right_window));
+}
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetDisplayNearestPoint) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  EXPECT_EQ(left_display, screen->GetDisplayNearestPoint(gfx::Point(0, 0)));
+  EXPECT_EQ(left_display, screen->GetDisplayNearestPoint(gfx::Point(250, 952)));
+  EXPECT_EQ(left_display,
+            screen->GetDisplayNearestPoint(gfx::Point(1919, 1199)));
+
+  EXPECT_EQ(right_display, screen->GetDisplayNearestPoint(gfx::Point(1920, 0)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayNearestPoint(gfx::Point(2000, 400)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayNearestPoint(gfx::Point(2719, 599)));
+}
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetDisplayMatching) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  EXPECT_EQ(left_display,
+            screen->GetDisplayMatching(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_EQ(left_display,
+            screen->GetDisplayMatching(gfx::Rect(1819, 1099, 100, 100)));
+
+  EXPECT_EQ(right_display,
+            screen->GetDisplayMatching(gfx::Rect(1920, 0, 100, 100)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayMatching(gfx::Rect(2619, 499, 100, 100)));
+}
+
+TEST_F(ScreenWinTestTwoDisplays1x, GetPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display primary = screen->GetPrimaryDisplay();
+  EXPECT_EQ(gfx::Point(0, 0), primary.bounds().origin());
+}
+
+// Two Displays of 2.0 Device Scale Factor.
+class ScreenWinTestTwoDisplays2x : public ScreenWinTest {
+ public:
+  ScreenWinTestTwoDisplays2x() = default;
+
+  void SetUpScreen(TestScreenWinInitializer* initializer) override {
+    gfx::SetDefaultDeviceScaleFactor(2.0);
+    initializer->AddMonitor(gfx::Rect(0, 0, 1920, 1200),
+                            gfx::Rect(0, 0, 1920, 1100),
+                            L"primary",
+                            2.0);
+    initializer->AddMonitor(gfx::Rect(1920, 0, 800, 600),
+                            gfx::Rect(1920, 0, 800, 600),
+                            L"secondary",
+                            2.0);
+    fake_hwnd_left_ = initializer->CreateFakeHwnd(gfx::Rect(0, 0, 1920, 1100));
+    fake_hwnd_right_ =
+        initializer->CreateFakeHwnd(gfx::Rect(1920, 0, 800, 600));
+  }
+
+  HWND GetLeftFakeHwnd() {
+    return fake_hwnd_left_;
+  }
+
+  HWND GetRightFakeHwnd() {
+    return fake_hwnd_right_;
+  }
+
+ private:
+  HWND fake_hwnd_left_ = nullptr;
+  HWND fake_hwnd_right_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenWinTestTwoDisplays2x);
+};
+
+TEST_F(ScreenWinTestTwoDisplays2x, GetDisplays) {
+  std::vector<gfx::Display> displays = GetScreen()->GetAllDisplays();
+  ASSERT_EQ(2u, displays.size());
+  EXPECT_EQ(gfx::Rect(0, 0, 960, 600), displays[0].bounds());
+  EXPECT_EQ(gfx::Rect(0, 0, 960, 550), displays[0].work_area());
+  EXPECT_EQ(gfx::Rect(960, 0, 400, 300), displays[1].bounds());
+  EXPECT_EQ(gfx::Rect(960, 0, 400, 300), displays[1].work_area());
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x, GetDisplayNearestWindowPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  EXPECT_EQ(screen->GetPrimaryDisplay(),
+            screen->GetDisplayNearestWindow(nullptr));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x, GetDisplayNearestWindow) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  gfx::NativeWindow left_window = GetNativeWindowFromHWND(GetLeftFakeHwnd());
+  EXPECT_EQ(left_display, screen->GetDisplayNearestWindow(left_window));
+
+  gfx::NativeWindow right_window = GetNativeWindowFromHWND(GetRightFakeHwnd());
+  EXPECT_EQ(right_display, screen->GetDisplayNearestWindow(right_window));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x, GetDisplayNearestPoint) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  EXPECT_EQ(left_display, screen->GetDisplayNearestPoint(gfx::Point(0, 0)));
+  EXPECT_EQ(left_display, screen->GetDisplayNearestPoint(gfx::Point(125, 476)));
+  EXPECT_EQ(left_display,
+            screen->GetDisplayNearestPoint(gfx::Point(959, 599)));
+
+  EXPECT_EQ(right_display, screen->GetDisplayNearestPoint(gfx::Point(960, 0)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayNearestPoint(gfx::Point(1000, 200)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayNearestPoint(gfx::Point(1359, 299)));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x, GetDisplayMatching) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  EXPECT_EQ(left_display,
+            screen->GetDisplayMatching(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_EQ(left_display,
+            screen->GetDisplayMatching(gfx::Rect(1819, 1099, 100, 100)));
+
+  EXPECT_EQ(right_display,
+            screen->GetDisplayMatching(gfx::Rect(1920, 0, 100, 100)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayMatching(gfx::Rect(2619, 499, 100, 100)));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x, GetPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display primary = screen->GetPrimaryDisplay();
+  EXPECT_EQ(gfx::Point(0, 0), primary.bounds().origin());
+}
+
+// Two Displays of 2.0 (Left) and 1.0 (Right) Device Scale Factor under
+// Windows DPI Virtualization. Note that the displays do not form a euclidean
+// space.
+class ScreenWinTestTwoDisplays2x1xVirtualized : public ScreenWinTest {
+ public:
+  ScreenWinTestTwoDisplays2x1xVirtualized() = default;
+
+  void SetUpScreen(TestScreenWinInitializer* initializer) override {
+    gfx::SetDefaultDeviceScaleFactor(2.0);
+    initializer->AddMonitor(gfx::Rect(0, 0, 3200, 1600),
+                            gfx::Rect(0, 0, 3200, 1500),
+                            L"primary",
+                            2.0);
+    initializer->AddMonitor(gfx::Rect(6400, 0, 3840, 2400),
+                            gfx::Rect(6400, 0, 3840, 2400),
+                            L"secondary",
+                            2.0);
+    fake_hwnd_left_ = initializer->CreateFakeHwnd(gfx::Rect(0, 0, 3200, 1500));
+    fake_hwnd_right_ =
+        initializer->CreateFakeHwnd(gfx::Rect(6400, 0, 3840, 2400));
+  }
+
+  HWND GetLeftFakeHwnd() {
+    return fake_hwnd_left_;
+  }
+
+  HWND GetRightFakeHwnd() {
+    return fake_hwnd_right_;
+  }
+
+ private:
+  HWND fake_hwnd_left_ = nullptr;
+  HWND fake_hwnd_right_ = nullptr;
+
+  DISALLOW_COPY_AND_ASSIGN(ScreenWinTestTwoDisplays2x1xVirtualized);
+};
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized, GetDisplays) {
+  std::vector<gfx::Display> displays = GetScreen()->GetAllDisplays();
+  ASSERT_EQ(2u, displays.size());
+  EXPECT_EQ(gfx::Rect(0, 0, 1600, 800), displays[0].bounds());
+  EXPECT_EQ(gfx::Rect(0, 0, 1600, 750), displays[0].work_area());
+  EXPECT_EQ(gfx::Rect(3200, 0, 1920, 1200), displays[1].bounds());
+  EXPECT_EQ(gfx::Rect(3200, 0, 1920, 1200), displays[1].work_area());
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized, GetNumDisplays) {
+  EXPECT_EQ(2, GetScreen()->GetNumDisplays());
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized,
+       GetDisplayNearestWindowPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  EXPECT_EQ(screen->GetPrimaryDisplay(),
+            screen->GetDisplayNearestWindow(nullptr));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized, GetDisplayNearestWindow) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  gfx::NativeWindow left_window = GetNativeWindowFromHWND(GetLeftFakeHwnd());
+  EXPECT_EQ(left_display, screen->GetDisplayNearestWindow(left_window));
+
+  gfx::NativeWindow right_window = GetNativeWindowFromHWND(GetRightFakeHwnd());
+  EXPECT_EQ(right_display, screen->GetDisplayNearestWindow(right_window));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized, GetDisplayNearestPoint) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  EXPECT_EQ(left_display, screen->GetDisplayNearestPoint(gfx::Point(0, 0)));
+  EXPECT_EQ(left_display, screen->GetDisplayNearestPoint(gfx::Point(125, 476)));
+  EXPECT_EQ(left_display,
+            screen->GetDisplayNearestPoint(gfx::Point(1599, 799)));
+
+  EXPECT_EQ(right_display, screen->GetDisplayNearestPoint(gfx::Point(3200, 0)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayNearestPoint(gfx::Point(4000, 400)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayNearestPoint(gfx::Point(5119, 1199)));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized, GetDisplayMatching) {
+  gfx::Screen* screen = GetScreen();
+  const gfx::Display left_display = screen->GetAllDisplays()[0];
+  const gfx::Display right_display = screen->GetAllDisplays()[1];
+
+  EXPECT_EQ(left_display,
+            screen->GetDisplayMatching(gfx::Rect(0, 0, 100, 100)));
+  EXPECT_EQ(left_display,
+            screen->GetDisplayMatching(gfx::Rect(1819, 1099, 100, 100)));
+
+  EXPECT_EQ(right_display,
+            screen->GetDisplayMatching(gfx::Rect(6400, 0, 100, 100)));
+  EXPECT_EQ(right_display,
+            screen->GetDisplayMatching(gfx::Rect(10139, 2299, 100, 100)));
+}
+
+TEST_F(ScreenWinTestTwoDisplays2x1xVirtualized, GetPrimaryDisplay) {
+  gfx::Screen* screen = GetScreen();
+  gfx::Display primary = screen->GetPrimaryDisplay();
+  EXPECT_EQ(gfx::Point(0, 0), primary.bounds().origin());
+}
+
 }  // namespace gfx