Reland linux_aura: Implement most of DesktopScreenX11.

ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc

Index: ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
diff --git a/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc b/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..45a2edfd8655e59a6099f78562a2aaf19d33da4a
--- /dev/null
+++ b/ui/views/widget/desktop_aura/desktop_screen_x11_unittest.cc
@@ -0,0 +1,186 @@
+// Copyright (c) 2013 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/widget/desktop_aura/desktop_screen_x11.h"
+
+#include "base/message_loop/message_loop.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/display_observer.h"
+
+namespace views {
+
+const int64 kFirstDisplay = 5321829;
+const int64 kSecondDisplay = 928310;
+
+class DesktopScreenX11Test : public testing::Test,
+                             public gfx::DisplayObserver {
+ public:
+  DesktopScreenX11Test() {}
+  virtual ~DesktopScreenX11Test() {}
+
+  // Overridden from testing::Test:
+  virtual void SetUp() OVERRIDE {
+    // Initialize the world to the single monitor case.
+    std::vector<gfx::Display> displays;
+    displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+    screen_.reset(new DesktopScreenX11(displays));
+    screen_->AddObserver(this);
+  }
+  virtual void TearDown() OVERRIDE {
+    screen_.reset();
+    message_loop_.RunUntilIdle();
+  }
+
+ protected:
+  std::vector<gfx::Display> changed_display_;
+  std::vector<gfx::Display> added_display_;
+  std::vector<gfx::Display> removed_display_;
+
+  DesktopScreenX11* screen() { return screen_.get(); }
+
+  void ResetDisplayChanges() {
+    changed_display_.clear();
+    added_display_.clear();
+    removed_display_.clear();
+  }
+
+ private:
+  // Overridden from gfx::DisplayObserver:
+  virtual void OnDisplayBoundsChanged(const gfx::Display& display) OVERRIDE {
+    changed_display_.push_back(display);
+  }
+
+  virtual void OnDisplayAdded(const gfx::Display& new_display) OVERRIDE {
+    added_display_.push_back(new_display);
+  }
+
+  virtual void OnDisplayRemoved(const gfx::Display& old_display) OVERRIDE {
+    removed_display_.push_back(old_display);
+  }
+
+  base::MessageLoopForUI message_loop_;
+  scoped_ptr<DesktopScreenX11> screen_;
+
+  DISALLOW_COPY_AND_ASSIGN(DesktopScreenX11Test);
+};
+
+TEST_F(DesktopScreenX11Test, BoundsChangeSingleMonitor) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(1u, changed_display_.size());
+  EXPECT_EQ(0u, added_display_.size());
+  EXPECT_EQ(0u, removed_display_.size());
+}
+
+TEST_F(DesktopScreenX11Test, AddMonitorToTheRight) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(gfx::Display(kSecondDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(0u, changed_display_.size());
+  EXPECT_EQ(1u, added_display_.size());
+  EXPECT_EQ(0u, removed_display_.size());
+}
+
+TEST_F(DesktopScreenX11Test, AddMonitorToTheLeft) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kSecondDisplay, gfx::Rect(0, 0, 1024, 768)));
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(1024, 0, 640, 480)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(1u, changed_display_.size());
+  EXPECT_EQ(1u, added_display_.size());
+  EXPECT_EQ(0u, removed_display_.size());
+}
+
+TEST_F(DesktopScreenX11Test, RemoveMonitorOnRight) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(gfx::Display(kSecondDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  ResetDisplayChanges();
+
+  displays.clear();
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(0u, changed_display_.size());
+  EXPECT_EQ(0u, added_display_.size());
+  EXPECT_EQ(1u, removed_display_.size());
+}
+
+TEST_F(DesktopScreenX11Test, RemoveMonitorOnLeft) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(gfx::Display(kSecondDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  ResetDisplayChanges();
+
+  displays.clear();
+  displays.push_back(gfx::Display(kSecondDisplay, gfx::Rect(0, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(1u, changed_display_.size());
+  EXPECT_EQ(0u, added_display_.size());
+  EXPECT_EQ(1u, removed_display_.size());
+}
+
+TEST_F(DesktopScreenX11Test, GetDisplayNearestPoint) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(gfx::Display(kSecondDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(kSecondDisplay,
+            screen()->GetDisplayNearestPoint(gfx::Point(650, 10)).id());
+  EXPECT_EQ(kFirstDisplay,
+            screen()->GetDisplayNearestPoint(gfx::Point(10, 10)).id());
+  EXPECT_EQ(kFirstDisplay,
+            screen()->GetDisplayNearestPoint(gfx::Point(10000, 10000)).id());
+}
+
+TEST_F(DesktopScreenX11Test, GetDisplayMatchingBasic) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(gfx::Display(kSecondDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(kSecondDisplay,
+            screen()->GetDisplayMatching(gfx::Rect(700, 20, 100, 100)).id());
+}
+
+TEST_F(DesktopScreenX11Test, GetDisplayMatchingOverlap) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay, gfx::Rect(0, 0, 640, 480)));
+  displays.push_back(gfx::Display(kSecondDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  screen()->ProcessDisplayChange(displays);
+
+  EXPECT_EQ(kSecondDisplay,
+            screen()->GetDisplayMatching(gfx::Rect(630, 20, 100, 100)).id());
+}
+
+TEST_F(DesktopScreenX11Test, GetPrimaryDisplay) {
+  std::vector<gfx::Display> displays;
+  displays.push_back(gfx::Display(kFirstDisplay,
+                                  gfx::Rect(640, 0, 1024, 768)));
+  displays.push_back(gfx::Display(kSecondDisplay, gfx::Rect(0, 0, 640, 480)));
+  screen()->ProcessDisplayChange(displays);
+
+  // The first display in the list is always the primary, even if other
+  // displays are to the left in screen layout.
+  EXPECT_EQ(kFirstDisplay, screen()->GetPrimaryDisplay().id());
+}
+
+}  // namespace views