Insert panel icons on the left of other panel icons.

ash/launcher/launcher_model_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/launcher/launcher_model.h"
 
 #include <set>
 #include <string>
 
 #include "ash/launcher/launcher_model_observer.h"
@@ skipping 111 matching lines @@
 
   // Move the third to the second.
   model.Move(2, 1);
   EXPECT_EQ("moved=1", observer.StateStringAndClear());
 
   // And back.
   model.Move(1, 2);
   EXPECT_EQ("moved=1", observer.StateStringAndClear());
 }
 
+// Assertions about automatic index when adding items.
+TEST(LauncherModel, AutomaticIndex) {
+  TestLauncherModelObserver observer;
+  LauncherModel model;
+
+  // Model is initially populated with one item.
+  EXPECT_EQ(1, model.item_count());
+
+  // Insert browser short cut at index 0.
+  LauncherItem browser_shortcut;
+  browser_shortcut.type = TYPE_BROWSER_SHORTCUT;
+  int browser_shortcut_index = model.Add(browser_shortcut);
+  EXPECT_EQ(0, browser_shortcut_index);
+
+  // Tabbed (and any non-panel type) items are inserted at the right
+  LauncherItem item;
+  int tabbed_index1 = model.Add(item);
+  EXPECT_EQ(1, tabbed_index1);
+  int tabbed_index2 = model.Add(item);
+  EXPECT_EQ(2, tabbed_index2);
+
+  // Panel items are inserted at the left of other panels.
+  item.type = TYPE_APP_PANEL;
+  int app_panel_index1 = model.Add(item);
+  EXPECT_EQ(4, app_panel_index1);
+
+  item.type = TYPE_APP_PANEL;
+  int app_panel_index2 = model.Add(item);
+  EXPECT_EQ(4, app_panel_index2);
+}
+
 // Assertions around where items are added.
 TEST(LauncherModel, AddIndices) {
   TestLauncherModelObserver observer;
   LauncherModel model;
 
   // Model is initially populated with one item.
   EXPECT_EQ(1, model.item_count());
 
   // Insert browser short cut at index 0.
   LauncherItem browser_shortcut;
@@ skipping 127 matching lines @@
   // Now change the type of the second item and make sure that it is moving
   // behind the shortcuts.
   item.type = TYPE_PLATFORM_APP;
   model.Set(app2_index, item);
 
   // The item should have moved in front of the app launcher.
   EXPECT_EQ(TYPE_PLATFORM_APP, model.items()[3].type);
 }
 
 }  // namespace ash