Chrome OS: Ash support for >=3 displays.

ash/display/display_manager_unittest.cc

 // Copyright (c) 2012 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/display_manager.h"
 
 #include "ash/ash_switches.h"
 #include "ash/display/display_controller.h"
 #include "ash/display/display_info.h"
 #include "ash/display/display_layout_store.h"
@@ skipping 250 matching lines @@
   EXPECT_EQ(1U, display_manager()->GetNumDisplays());
   EXPECT_EQ("0 0 1", GetCountSummary());
   reset();
 
   display_manager()->AddRemoveDisplay();
   EXPECT_EQ(2U, display_manager()->GetNumDisplays());
   EXPECT_EQ("0 1 0", GetCountSummary());
   reset();
 }
 
+// Tests support for 3 displays.
+TEST_F(DisplayManagerTest, UpdateThreeDisplaysTest) {
+  if (!SupportsMultipleDisplays())
+    return;
+
+  EXPECT_EQ(1U, display_manager()->GetNumDisplays());
+
+  // Test with three displays.
+  UpdateDisplay("0+0-640x480,640+0-320x200,960+0-400x300");
+  EXPECT_EQ(3U, display_manager()->GetNumDisplays());
+  EXPECT_EQ("0,0 640x480",
+            display_manager()->GetDisplayAt(0).bounds().ToString());
+  EXPECT_EQ("640,0 320x200",
+            display_manager()->GetDisplayAt(1).bounds().ToString());
+  EXPECT_EQ("960,0 400x300",
+            display_manager()->GetDisplayAt(2).bounds().ToString());
+
+  EXPECT_EQ("1 2 0", GetCountSummary());
+  EXPECT_EQ(display_manager()->GetDisplayAt(0).id(), changed()[0].id());
+  EXPECT_EQ(display_manager()->GetDisplayAt(1).id(), added()[0].id());
+  EXPECT_EQ(display_manager()->GetDisplayAt(2).id(), added()[1].id());
+  EXPECT_EQ("0,0 640x480", changed()[0].bounds().ToString());
+  // Secondary and terniary displays are on right.
+  EXPECT_EQ("640,0 320x200", added()[0].bounds().ToString());
+  EXPECT_EQ("640,0 320x200",
+            GetDisplayInfo(added()[0]).bounds_in_native().ToString());
+  EXPECT_EQ("960,0 400x300", added()[1].bounds().ToString());
+  EXPECT_EQ("960,0 400x300",
+            GetDisplayInfo(added()[1]).bounds_in_native().ToString());
+  reset();
+}
+
 TEST_F(DisplayManagerTest, OverscanInsetsTest) {
   if (!SupportsMultipleDisplays())
     return;
 
   UpdateDisplay("0+0-500x500,0+501-400x400");
   reset();
   ASSERT_EQ(2u, display_manager()->GetNumDisplays());
   const DisplayInfo& display_info1 = GetDisplayInfoAt(0);
   const DisplayInfo& display_info2 = GetDisplayInfoAt(1);
   display_manager()->SetOverscanInsets(
@@ skipping 1315 matching lines @@
   FontTestHelper helper(1.25f, FontTestHelper::INTERNAL);
   ASSERT_DOUBLE_EQ(
       1.0f, Shell::GetScreen()->GetPrimaryDisplay().device_scale_factor());
   EXPECT_FALSE(IsTextSubpixelPositioningEnabled());
   DisplayInfo::SetUse125DSFForUIScaling(false);
 }
 
 #endif  // OS_CHROMEOS
 
 }  // namespace ash