Only support left/right maximizing at 50% width when the --ash-enable-alternate-caption-button

ash/wm/window_util_unittest.cc

 // 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 "ash/wm/window_util.h"
 
+#include "ash/root_window_controller.h"
 #include "ash/screen_ash.h"
+#include "ash/shelf/shelf_layout_manager.h"
 #include "ash/test/ash_test_base.h"
 #include "ui/aura/window.h"
 
 namespace ash {
 
 typedef test::AshTestBase WindowUtilTest;
 
+// Test the behavior of SnapWindowToEdge().
+TEST_F(WindowUtilTest, SnapWindowToEdge) {
+  if (!SupportsMultipleDisplays())
+    return;
+
+  UpdateDisplay("0+0-500x400, 0+500-600x400");
+  scoped_ptr<aura::Window> window(
+      CreateTestWindowInShellWithBounds(gfx::Rect(12, 20, 100, 100)));
+
+  internal::RootWindowController* root_window_controller =
+      internal::RootWindowController::ForWindow(window.get());
+  internal::ShelfLayoutManager* shelf_layout_manager =
+      root_window_controller->GetShelfLayoutManager();
+  EXPECT_EQ(SHELF_ALIGNMENT_BOTTOM, shelf_layout_manager->GetAlignment());
+  shelf_layout_manager->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_NEVER);
+  EXPECT_EQ(SHELF_VISIBLE, shelf_layout_manager->visibility_state());
+  const int kSnappedHeight = 400 -
+      internal::ShelfLayoutManager::GetPreferredShelfSize();
+
+  wm::SnapWindowToEdge(window.get(), wm::SNAP_LEFT_EDGE);
+  EXPECT_EQ(gfx::Rect(0,0,250,kSnappedHeight).ToString(),

[Mr4D (OOO till 08-26), 2013/08/29 01:03:15]

0, 0, 250, kSna..

(Spaces are missing)

+            window->GetBoundsInScreen().ToString());
+  wm::SnapWindowToEdge(window.get(), wm::SNAP_RIGHT_EDGE);
+  EXPECT_EQ(gfx::Rect(250,0,250,kSnappedHeight).ToString(),

[Mr4D (OOO till 08-26), 2013/08/29 01:03:15]

Same here and more below.

+            window->GetBoundsInScreen().ToString());
+  window->SetBoundsInScreen(gfx::Rect(600, 0, 100, 100),
+                            ScreenAsh::GetSecondaryDisplay());
+  wm::SnapWindowToEdge(window.get(), wm::SNAP_LEFT_EDGE);
+  EXPECT_EQ(gfx::Rect(500,0,300,kSnappedHeight).ToString(),
+            window->GetBoundsInScreen().ToString());
+  wm::SnapWindowToEdge(window.get(), wm::SNAP_RIGHT_EDGE);
+  EXPECT_EQ(gfx::Rect(800,0,300,kSnappedHeight).ToString(),
+            window->GetBoundsInScreen().ToString());
+}
+
+// Test the behavior of CenterWindow().
 TEST_F(WindowUtilTest, CenterWindow) {
   if (!SupportsMultipleDisplays())
     return;
 
-  UpdateDisplay("500x400, 600x400");
+  UpdateDisplay("0+0-500x400, 0+500-600x400");
   scoped_ptr<aura::Window> window(
       CreateTestWindowInShellWithBounds(gfx::Rect(12, 20, 100, 100)));
+
+  internal::RootWindowController* root_window_controller =
+      internal::RootWindowController::ForWindow(window.get());
+  internal::ShelfLayoutManager* shelf_layout_manager =
+      root_window_controller->GetShelfLayoutManager();
+  EXPECT_EQ(SHELF_ALIGNMENT_BOTTOM, shelf_layout_manager->GetAlignment());
+  shelf_layout_manager->SetAutoHideBehavior(SHELF_AUTO_HIDE_BEHAVIOR_NEVER);
+  EXPECT_EQ(SHELF_VISIBLE, shelf_layout_manager->visibility_state());
+  const int kCenteredY =
+      (400 - internal::ShelfLayoutManager::GetPreferredShelfSize() - 100) / 2;
+
   wm::CenterWindow(window.get());
-  EXPECT_EQ("200,126 100x100", window->bounds().ToString());
-  EXPECT_EQ("200,126 100x100", window->GetBoundsInScreen().ToString());
+  EXPECT_EQ(gfx::Rect(200,kCenteredY,100,100).ToString(),
+            window->GetBoundsInScreen().ToString());
   window->SetBoundsInScreen(gfx::Rect(600, 0, 100, 100),
                             ScreenAsh::GetSecondaryDisplay());
   wm::CenterWindow(window.get());
-  EXPECT_EQ("250,126 100x100", window->bounds().ToString());
-  EXPECT_EQ("750,126 100x100", window->GetBoundsInScreen().ToString());
+  EXPECT_EQ(gfx::Rect(750,kCenteredY,100,100).ToString(),

[Mr4D (OOO till 08-26), 2013/08/29 01:03:15]

And more spaces are missing.

+            window->GetBoundsInScreen().ToString());
 }
 
 }  // namespace ash