ui/app_list/cocoa/apps_grid_controller_unittest.mm

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/mac/foundation_util.h"
   6 #include "base/mac/scoped_nsobject.h"
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "skia/ext/skia_utils_mac.h"
   9 #import "testing/gtest_mac.h"
  10 #include "ui/app_list/app_list_constants.h"
  11 #include "ui/app_list/app_list_item.h"
  12 #import "ui/app_list/cocoa/apps_collection_view_drag_manager.h"
  13 #import "ui/app_list/cocoa/apps_grid_controller.h"
  14 #import "ui/app_list/cocoa/apps_grid_view_item.h"
  15 #import "ui/app_list/cocoa/apps_pagination_model_observer.h"
  16 #import "ui/app_list/cocoa/test/apps_grid_controller_test_helper.h"
  17 #include "ui/app_list/test/app_list_test_model.h"
  18 #include "ui/app_list/test/app_list_test_view_delegate.h"
  19 #include "ui/base/models/simple_menu_model.h"
  20 #import "ui/events/test/cocoa_test_event_utils.h"
  21
  22 @interface TestPaginationObserver : NSObject<AppsPaginationModelObserver> {
  23  @private
  24   NSInteger hoveredSegmentForTest_;
  25   int totalPagesChangedCount_;
  26   int selectedPageChangedCount_;
  27   int lastNewSelectedPage_;
  28   bool visibilityDidChange_;
  29 }
  30
  31 @property(assign, nonatomic) NSInteger hoveredSegmentForTest;
  32 @property(assign, nonatomic) int totalPagesChangedCount;
  33 @property(assign, nonatomic) int selectedPageChangedCount;
  34 @property(assign, nonatomic) int lastNewSelectedPage;
  35
  36 - (bool)readVisibilityDidChange;
  37
  38 @end
  39
  40 @implementation TestPaginationObserver
  41
  42 @synthesize hoveredSegmentForTest = hoveredSegmentForTest_;
  43 @synthesize totalPagesChangedCount = totalPagesChangedCount_;
  44 @synthesize selectedPageChangedCount = selectedPageChangedCount_;
  45 @synthesize lastNewSelectedPage = lastNewSelectedPage_;
  46
  47 - (id)init {
  48   if ((self = [super init]))
  49     hoveredSegmentForTest_ = -1;
  50
  51   return self;
  52 }
  53
  54 - (bool)readVisibilityDidChange {
  55   bool truth = visibilityDidChange_;
  56   visibilityDidChange_ = false;
  57   return truth;
  58 }
  59
  60 - (void)totalPagesChanged {
  61   ++totalPagesChangedCount_;
  62 }
  63
  64 - (void)selectedPageChanged:(int)newSelected {
  65   ++selectedPageChangedCount_;
  66   lastNewSelectedPage_ = newSelected;
  67 }
  68
  69 - (void)pageVisibilityChanged {
  70   visibilityDidChange_ = true;
  71 }
  72
  73 - (NSInteger)pagerSegmentAtLocation:(NSPoint)locationInWindow {
  74   return hoveredSegmentForTest_;
  75 }
  76
  77 @end
  78
  79 namespace app_list {
  80 namespace test {
  81
  82 namespace {
  83
  84 class AppsGridControllerTest : public AppsGridControllerTestHelper {
  85  public:
  86   AppsGridControllerTest() {}
  87
  88   AppListTestViewDelegate* delegate() {
  89     return owned_delegate_.get();
  90   }
  91
  92   NSColor* ButtonTitleColorAt(size_t index) {
  93     NSDictionary* attributes =
  94         [[[GetItemViewAt(index) cell] attributedTitle] attributesAtIndex:0
  95                                                           effectiveRange:NULL];
  96     return [attributes objectForKey:NSForegroundColorAttributeName];
  97   }
  98
  99   void SetUp() override {
 100     owned_apps_grid_controller_.reset([[AppsGridController alloc] init]);
 101     owned_delegate_.reset(new AppListTestViewDelegate);
 102     [owned_apps_grid_controller_ setDelegate:owned_delegate_.get()];
 103     AppsGridControllerTestHelper::SetUpWithGridController(
 104         owned_apps_grid_controller_.get());
 105
 106     [[test_window() contentView] addSubview:[apps_grid_controller_ view]];
 107     [test_window() makePretendKeyWindowAndSetFirstResponder:
 108         [apps_grid_controller_ collectionViewAtPageIndex:0]];
 109   }
 110
 111   void TearDown() override {
 112     [owned_apps_grid_controller_ setDelegate:NULL];
 113     owned_apps_grid_controller_.reset();
 114     AppsGridControllerTestHelper::TearDown();
 115   }
 116
 117   void ReplaceTestModel(int item_count) {
 118     // Clear the delegate before reseting and destroying the model.
 119     [owned_apps_grid_controller_ setDelegate:NULL];
 120
 121     owned_delegate_->ReplaceTestModel(item_count);
 122     [owned_apps_grid_controller_ setDelegate:owned_delegate_.get()];
 123   }
 124
 125   AppListTestModel* model() { return owned_delegate_->GetTestModel(); }
 126
 127  private:
 128   base::scoped_nsobject<AppsGridController> owned_apps_grid_controller_;
 129   scoped_ptr<AppListTestViewDelegate> owned_delegate_;
 130
 131   DISALLOW_COPY_AND_ASSIGN(AppsGridControllerTest);
 132 };
 133
 134 class AppListItemWithMenu : public AppListItem {
 135  public:
 136   explicit AppListItemWithMenu(const std::string& id)
 137       : AppListItem(id),
 138         menu_model_(NULL),
 139         menu_ready_(true) {
 140     SetName(id);
 141     menu_model_.AddItem(0, base::UTF8ToUTF16("Menu For: " + id));
 142   }
 143
 144   void SetMenuReadyForTesting(bool ready) {
 145     menu_ready_ = ready;
 146   }
 147
 148   ui::MenuModel* GetContextMenuModel() override {
 149     if (!menu_ready_)
 150       return NULL;
 151
 152     return &menu_model_;
 153   }
 154
 155  private:
 156   ui::SimpleMenuModel menu_model_;
 157   bool menu_ready_;
 158
 159   DISALLOW_COPY_AND_ASSIGN(AppListItemWithMenu);
 160 };
 161
 162 // Generate a mouse event at the centre of the view in |page| with the given
 163 // |index_in_page| that can be used to initiate, update and complete drag
 164 // operations.
 165 NSEvent* MouseEventInCell(NSCollectionView* page, size_t index_in_page) {
 166   NSRect cell_rect = [page frameForItemAtIndex:index_in_page];
 167   NSPoint point_in_view = NSMakePoint(NSMidX(cell_rect), NSMidY(cell_rect));
 168   NSPoint point_in_window = [page convertPoint:point_in_view
 169                                         toView:nil];
 170   return cocoa_test_event_utils::LeftMouseDownAtPoint(point_in_window);
 171 }
 172
 173 NSEvent* MouseEventForScroll(NSView* view, CGFloat relative_x) {
 174   NSRect view_rect = [view frame];
 175   NSPoint point_in_view = NSMakePoint(NSMidX(view_rect), NSMidY(view_rect));
 176   point_in_view.x += point_in_view.x * relative_x;
 177   NSPoint point_in_window = [view convertPoint:point_in_view
 178                                         toView:nil];
 179   return cocoa_test_event_utils::LeftMouseDownAtPoint(point_in_window);
 180 }
 181
 182 }  // namespace
 183
 184 TEST_VIEW(AppsGridControllerTest, [apps_grid_controller_ view]);
 185
 186 // Test showing with an empty model.
 187 TEST_F(AppsGridControllerTest, EmptyModelAndShow) {
 188   EXPECT_TRUE([[apps_grid_controller_ view] superview]);
 189
 190   // First page should always exist, even if empty.
 191   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 192   EXPECT_EQ(0u, [[GetPageAt(0) content] count]);
 193   EXPECT_TRUE([GetPageAt(0) superview]);  // The pages container.
 194   EXPECT_TRUE([[GetPageAt(0) superview] superview]);
 195 }
 196
 197 // Test with a single item.
 198 // This test is disabled in builders until the delay to wait for the collection
 199 // view to load subviews can be removed, or some other solution is found.
 200 TEST_F(AppsGridControllerTest, DISABLED_SingleEntryModel) {
 201   // We need to "wake up" the NSCollectionView, otherwise it does not
 202   // immediately update its subviews later in this function.
 203   // When this test is run by itself, it's enough just to send a keypress (and
 204   // this delay is not needed).
 205   DelayForCollectionView();
 206   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 207   EXPECT_EQ(0u, [[GetPageAt(0) content] count]);
 208
 209   model()->PopulateApps(1);
 210   SinkEvents();
 211   EXPECT_FALSE([GetPageAt(0) animations]);
 212
 213   EXPECT_EQ(1u, [[GetPageAt(0) content] count]);
 214   NSArray* subviews = [GetPageAt(0) subviews];
 215   EXPECT_EQ(1u, [subviews count]);
 216
 217   // Note that using GetItemViewAt(0) here also works, and returns non-nil even
 218   // without the delay, but a "click" on it does not register without the delay.
 219   NSView* subview = [subviews objectAtIndex:0];
 220
 221   // Launch the item.
 222   SimulateClick(subview);
 223   SinkEvents();
 224   EXPECT_EQ(1, model()->activate_count());
 225   ASSERT_TRUE(model()->last_activated());
 226   EXPECT_EQ(std::string("Item 0"), model()->last_activated()->name());
 227 }
 228
 229 // Test activating an item on the second page (the 17th item).
 230 TEST_F(AppsGridControllerTest, DISABLED_TwoPageModel) {
 231   DelayForCollectionView();
 232   ReplaceTestModel(kItemsPerPage * 2);
 233   [apps_grid_controller_ scrollToPage:1];
 234
 235   // The NSScrollView animator ignores the duration configured on the
 236   // NSAnimationContext (set by CocoaTest::Init), so we need to delay here.
 237   DelayForCollectionView();
 238   NSArray* subviews = [GetPageAt(1) subviews];
 239   NSView* subview = [subviews objectAtIndex:0];
 240   // Launch the item.
 241   SimulateClick(subview);
 242   SinkEvents();
 243   EXPECT_EQ(1, model()->activate_count());
 244   ASSERT_TRUE(model()->last_activated());
 245   EXPECT_EQ(std::string("Item 16"), model()->last_activated()->name());
 246 }
 247
 248 // Test setModel.
 249 TEST_F(AppsGridControllerTest, ReplaceModel) {
 250   const size_t kOrigItems = 1;
 251   const size_t kNewItems = 2;
 252
 253   model()->PopulateApps(kOrigItems);
 254   EXPECT_EQ(kOrigItems, [[GetPageAt(0) content] count]);
 255
 256   ReplaceTestModel(kNewItems);
 257   EXPECT_EQ(kNewItems, [[GetPageAt(0) content] count]);
 258 }
 259
 260 // Test pagination.
 261 TEST_F(AppsGridControllerTest, Pagination) {
 262   model()->PopulateApps(1);
 263   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 264   EXPECT_EQ(1u, [[GetPageAt(0) content] count]);
 265
 266   ReplaceTestModel(kItemsPerPage);
 267   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 268   EXPECT_EQ(kItemsPerPage, [[GetPageAt(0) content] count]);
 269
 270   // Test adding an item onto the next page.
 271   model()->PopulateApps(1);  // Now 17 items.
 272   EXPECT_EQ(2u, [apps_grid_controller_ pageCount]);
 273   EXPECT_EQ(kItemsPerPage, [[GetPageAt(0) content] count]);
 274   EXPECT_EQ(1u, [[GetPageAt(1) content] count]);
 275
 276   // Test N pages with the last page having one empty spot.
 277   const size_t kPagesToTest = 3;
 278   ReplaceTestModel(kPagesToTest * kItemsPerPage - 1);
 279   EXPECT_EQ(kPagesToTest, [apps_grid_controller_ pageCount]);
 280   for (size_t page_index = 0; page_index < kPagesToTest - 1; ++page_index) {
 281     EXPECT_EQ(kItemsPerPage, [[GetPageAt(page_index) content] count]);
 282   }
 283   EXPECT_EQ(kItemsPerPage - 1, [[GetPageAt(kPagesToTest - 1) content] count]);
 284
 285   // Test removing pages.
 286   ReplaceTestModel(1);
 287   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 288   EXPECT_EQ(1u, [[GetPageAt(0) content] count]);
 289 }
 290
 291 // Tests that selecting an item changes the text color correctly.
 292 TEST_F(AppsGridControllerTest, SelectionChangesTextColor) {
 293   model()->PopulateApps(2);
 294   [apps_grid_controller_ selectItemAtIndex:0];
 295   EXPECT_NSEQ(ButtonTitleColorAt(0),
 296               gfx::SkColorToSRGBNSColor(app_list::kGridTitleHoverColor));
 297   EXPECT_NSEQ(ButtonTitleColorAt(1),
 298               gfx::SkColorToSRGBNSColor(app_list::kGridTitleColor));
 299
 300   [apps_grid_controller_ selectItemAtIndex:1];
 301   EXPECT_NSEQ(ButtonTitleColorAt(0),
 302               gfx::SkColorToSRGBNSColor(app_list::kGridTitleColor));
 303   EXPECT_NSEQ(ButtonTitleColorAt(1),
 304               gfx::SkColorToSRGBNSColor(app_list::kGridTitleHoverColor));
 305 }
 306
 307 // Tests basic keyboard navigation on the first page.
 308 TEST_F(AppsGridControllerTest, FirstPageKeyboardNavigation) {
 309   model()->PopulateApps(kItemsPerPage - 2);
 310   EXPECT_EQ(kItemsPerPage - 2, [[GetPageAt(0) content] count]);
 311
 312   SimulateKeyAction(@selector(moveRight:));
 313   EXPECT_EQ(0u, [apps_grid_controller_ selectedItemIndex]);
 314
 315   SimulateKeyAction(@selector(moveRight:));
 316   EXPECT_EQ(1u, [apps_grid_controller_ selectedItemIndex]);
 317
 318   SimulateKeyAction(@selector(moveDown:));
 319   EXPECT_EQ(5u, [apps_grid_controller_ selectedItemIndex]);
 320
 321   SimulateKeyAction(@selector(moveLeft:));
 322   EXPECT_EQ(4u, [apps_grid_controller_ selectedItemIndex]);
 323
 324   SimulateKeyAction(@selector(moveUp:));
 325   EXPECT_EQ(0u, [apps_grid_controller_ selectedItemIndex]);
 326
 327   // Go to the third item, and launch it.
 328   SimulateKeyAction(@selector(moveRight:));
 329   SimulateKeyAction(@selector(moveRight:));
 330   EXPECT_EQ(2u, [apps_grid_controller_ selectedItemIndex]);
 331   SimulateKeyAction(@selector(insertNewline:));
 332   EXPECT_EQ(1, model()->activate_count());
 333   ASSERT_TRUE(model()->last_activated());
 334   EXPECT_EQ(std::string("Item 2"), model()->last_activated()->name());
 335 }
 336
 337 // Tests keyboard navigation across pages.
 338 TEST_F(AppsGridControllerTest, CrossPageKeyboardNavigation) {
 339   model()->PopulateApps(kItemsPerPage + 10);
 340   EXPECT_EQ(kItemsPerPage, [[GetPageAt(0) content] count]);
 341   EXPECT_EQ(10u, [[GetPageAt(1) content] count]);
 342
 343   // Moving Left, Up, or PageUp from the top-left corner of the first page does
 344   // nothing.
 345   [apps_grid_controller_ selectItemAtIndex:0];
 346   SimulateKeyAction(@selector(moveLeft:));
 347   EXPECT_EQ(0u, [apps_grid_controller_ selectedItemIndex]);
 348   SimulateKeyAction(@selector(moveUp:));
 349   EXPECT_EQ(0u, [apps_grid_controller_ selectedItemIndex]);
 350   SimulateKeyAction(@selector(scrollPageUp:));
 351   EXPECT_EQ(0u, [apps_grid_controller_ selectedItemIndex]);
 352
 353   // Moving Right from the right side goes to the next page. Moving Left goes
 354   // back to the first page.
 355   [apps_grid_controller_ selectItemAtIndex:3];
 356   SimulateKeyAction(@selector(moveRight:));
 357   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 358   EXPECT_EQ(kItemsPerPage, [apps_grid_controller_ selectedItemIndex]);
 359   SimulateKeyAction(@selector(moveLeft:));
 360   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 361   EXPECT_EQ(3u, [apps_grid_controller_ selectedItemIndex]);
 362
 363   // Moving Down from the bottom does nothing.
 364   [apps_grid_controller_ selectItemAtIndex:13];
 365   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 366   SimulateKeyAction(@selector(moveDown:));
 367   EXPECT_EQ(13u, [apps_grid_controller_ selectedItemIndex]);
 368
 369   // Moving Right into a non-existent square on the next page will select the
 370   // last item.
 371   [apps_grid_controller_ selectItemAtIndex:15];
 372   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 373   SimulateKeyAction(@selector(moveRight:));
 374   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 375   EXPECT_EQ(kItemsPerPage + 9, [apps_grid_controller_ selectedItemIndex]);
 376
 377   // PageDown and PageUp switches pages while maintaining the same selection
 378   // position.
 379   [apps_grid_controller_ selectItemAtIndex:6];
 380   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 381   SimulateKeyAction(@selector(scrollPageDown:));
 382   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 383   EXPECT_EQ(kItemsPerPage + 6, [apps_grid_controller_ selectedItemIndex]);
 384   SimulateKeyAction(@selector(scrollPageUp:));
 385   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 386   EXPECT_EQ(6u, [apps_grid_controller_ selectedItemIndex]);
 387
 388   // PageDown into a non-existent square on the next page will select the last
 389   // item.
 390   [apps_grid_controller_ selectItemAtIndex:11];
 391   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 392   SimulateKeyAction(@selector(scrollPageDown:));
 393   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 394   EXPECT_EQ(kItemsPerPage + 9, [apps_grid_controller_ selectedItemIndex]);
 395
 396   // Moving Right, Down, or PageDown from the bottom-right corner of the last
 397   // page (not the last item) does nothing.
 398   [apps_grid_controller_ selectItemAtIndex:kItemsPerPage + 9];
 399   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 400   SimulateKeyAction(@selector(moveRight:));
 401   EXPECT_EQ(kItemsPerPage + 9, [apps_grid_controller_ selectedItemIndex]);
 402   SimulateKeyAction(@selector(moveDown:));
 403   EXPECT_EQ(kItemsPerPage + 9, [apps_grid_controller_ selectedItemIndex]);
 404   SimulateKeyAction(@selector(scrollPageDown:));
 405   EXPECT_EQ(kItemsPerPage + 9, [apps_grid_controller_ selectedItemIndex]);
 406
 407   // After page switch, arrow keys select first item on current page.
 408   [apps_grid_controller_ scrollToPage:0];
 409   [apps_grid_controller_ scrollToPage:1];
 410   EXPECT_EQ(NSNotFound, [apps_grid_controller_ selectedItemIndex]);
 411   SimulateKeyAction(@selector(moveUp:));
 412   EXPECT_EQ(kItemsPerPage, [apps_grid_controller_ selectedItemIndex]);
 413 }
 414
 415 // Highlighting an item should cause the page it's on to be visible.
 416 TEST_F(AppsGridControllerTest, EnsureHighlightedVisible) {
 417   model()->PopulateApps(3 * kItemsPerPage);
 418   EXPECT_EQ(kItemsPerPage, [[GetPageAt(2) content] count]);
 419
 420   // First and last items of first page.
 421   [apps_grid_controller_ selectItemAtIndex:0];
 422   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 423   [apps_grid_controller_ selectItemAtIndex:kItemsPerPage - 1];
 424   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 425
 426   // First item of second page.
 427   [apps_grid_controller_ selectItemAtIndex:kItemsPerPage + 1];
 428   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 429
 430   // Last item in model.
 431   [apps_grid_controller_ selectItemAtIndex:3 * kItemsPerPage - 1];
 432   EXPECT_EQ(2u, [apps_grid_controller_ visiblePage]);
 433 }
 434
 435 // Test runtime updates: adding items, removing items, and moving items (e.g. in
 436 // response to app install, uninstall, and chrome sync changes. Also test
 437 // changing titles and icons.
 438 TEST_F(AppsGridControllerTest, ModelUpdate) {
 439   model()->PopulateApps(2);
 440   EXPECT_EQ(2u, [[GetPageAt(0) content] count]);
 441   EXPECT_EQ(std::string("|Item 0,Item 1|"), GetViewContent());
 442
 443   // Add an item (PopulateApps will create a new "Item 2").
 444   model()->PopulateApps(1);
 445   EXPECT_EQ(3u, [[GetPageAt(0) content] count]);
 446   NSButton* button = GetItemViewAt(2);
 447   EXPECT_NSEQ(@"Item 2", [button title]);
 448   EXPECT_EQ(std::string("|Item 0,Item 1,Item 2|"), GetViewContent());
 449
 450   // Update the title via the ItemModelObserver.
 451   app_list::AppListItem* item_model =
 452       model()->top_level_item_list()->item_at(2);
 453   model()->SetItemName(item_model, "UpdatedItem");
 454   EXPECT_NSEQ(@"UpdatedItem", [button title]);
 455
 456   // Test icon updates through the model observer by ensuring the icon changes.
 457   item_model->SetIcon(gfx::ImageSkia(), false);
 458   NSSize icon_size = [[button image] size];
 459   EXPECT_EQ(0, icon_size.width);
 460   EXPECT_EQ(0, icon_size.height);
 461
 462   SkBitmap bitmap;
 463   const int kTestImageSize = 10;
 464   const int kTargetImageSize = 48;
 465   bitmap.setInfo(SkImageInfo::MakeN32Premul(kTestImageSize, kTestImageSize));
 466   item_model->SetIcon(gfx::ImageSkia::CreateFrom1xBitmap(bitmap), false);
 467   icon_size = [[button image] size];
 468   // Icon should always be resized to 48x48.
 469   EXPECT_EQ(kTargetImageSize, icon_size.width);
 470   EXPECT_EQ(kTargetImageSize, icon_size.height);
 471 }
 472
 473 TEST_F(AppsGridControllerTest, ModelAdd) {
 474   model()->PopulateApps(2);
 475   EXPECT_EQ(2u, [[GetPageAt(0) content] count]);
 476   EXPECT_EQ(std::string("|Item 0,Item 1|"), GetViewContent());
 477
 478   app_list::AppListItemList* item_list = model()->top_level_item_list();
 479
 480   model()->CreateAndAddItem("Item 2");
 481   ASSERT_EQ(3u, item_list->item_count());
 482   EXPECT_EQ(3u, [apps_grid_controller_ itemCount]);
 483   EXPECT_EQ(std::string("|Item 0,Item 1,Item 2|"), GetViewContent());
 484
 485   // Test adding an item whose position is in the middle.
 486   app_list::AppListItem* item0 = item_list->item_at(0);
 487   app_list::AppListItem* item1 = item_list->item_at(1);
 488   app_list::AppListItem* item3 = model()->CreateItem("Item Three");
 489   model()->AddItem(item3);
 490   item_list->SetItemPosition(
 491       item3, item0->position().CreateBetween(item1->position()));
 492   EXPECT_EQ(4u, [apps_grid_controller_ itemCount]);
 493   EXPECT_EQ(std::string("|Item 0,Item Three,Item 1,Item 2|"), GetViewContent());
 494 }
 495
 496 TEST_F(AppsGridControllerTest, ModelMove) {
 497   model()->PopulateApps(3);
 498   EXPECT_EQ(3u, [[GetPageAt(0) content] count]);
 499   EXPECT_EQ(std::string("|Item 0,Item 1,Item 2|"), GetViewContent());
 500
 501   // Test swapping items (e.g. rearranging via sync).
 502   model()->top_level_item_list()->MoveItem(1, 2);
 503   EXPECT_EQ(std::string("|Item 0,Item 2,Item 1|"), GetViewContent());
 504 }
 505
 506 TEST_F(AppsGridControllerTest, ModelRemove) {
 507   model()->PopulateApps(3);
 508   EXPECT_EQ(3u, [[GetPageAt(0) content] count]);
 509   EXPECT_EQ(std::string("|Item 0,Item 1,Item 2|"), GetViewContent());
 510
 511   // Test removing an item at the end.
 512   model()->DeleteItem("Item 2");
 513   EXPECT_EQ(2u, [apps_grid_controller_ itemCount]);
 514   EXPECT_EQ(std::string("|Item 0,Item 1|"), GetViewContent());
 515
 516   // Test removing in the middle.
 517   model()->CreateAndAddItem("Item 2");
 518   EXPECT_EQ(3u, [apps_grid_controller_ itemCount]);
 519   EXPECT_EQ(std::string("|Item 0,Item 1,Item 2|"), GetViewContent());
 520   model()->DeleteItem("Item 1");
 521   EXPECT_EQ(2u, [apps_grid_controller_ itemCount]);
 522   EXPECT_EQ(std::string("|Item 0,Item 2|"), GetViewContent());
 523 }
 524
 525 TEST_F(AppsGridControllerTest, ModelRemoveSeveral) {
 526   model()->PopulateApps(3);
 527   EXPECT_EQ(3u, [[GetPageAt(0) content] count]);
 528   EXPECT_EQ(std::string("|Item 0,Item 1,Item 2|"), GetViewContent());
 529
 530   // Test removing multiple items via the model.
 531   model()->DeleteItem("Item 0");
 532   model()->DeleteItem("Item 1");
 533   model()->DeleteItem("Item 2");
 534   EXPECT_EQ(0u, [apps_grid_controller_ itemCount]);
 535   EXPECT_EQ(std::string("||"), GetViewContent());
 536 }
 537
 538 TEST_F(AppsGridControllerTest, ModelRemovePage) {
 539   app_list::AppListItemList* item_list = model()->top_level_item_list();
 540
 541   model()->PopulateApps(kItemsPerPage + 1);
 542   ASSERT_EQ(kItemsPerPage + 1, item_list->item_count());
 543   EXPECT_EQ(kItemsPerPage + 1, [apps_grid_controller_ itemCount]);
 544   EXPECT_EQ(2u, [apps_grid_controller_ pageCount]);
 545
 546   // Test removing the last item when there is one item on the second page.
 547   app_list::AppListItem* last_item = item_list->item_at(kItemsPerPage);
 548   model()->DeleteItem(last_item->id());
 549   EXPECT_EQ(kItemsPerPage, item_list->item_count());
 550   EXPECT_EQ(kItemsPerPage, [apps_grid_controller_ itemCount]);
 551   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 552 }
 553
 554 // Test install progress bars, and install flow with item highlighting.
 555 TEST_F(AppsGridControllerTest, ItemInstallProgress) {
 556   ReplaceTestModel(kItemsPerPage + 1);
 557   EXPECT_EQ(2u, [apps_grid_controller_ pageCount]);
 558   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 559   // The single item on the second page.
 560   int kTestItemIndex = kItemsPerPage;
 561   app_list::AppListItem* item_model =
 562       model()->top_level_item_list()->item_at(kTestItemIndex);
 563
 564   // Highlighting an item should activate the page it is on.
 565   model()->HighlightItemAt(kTestItemIndex);
 566   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 567
 568   // Starting install should add a progress bar, and temporarily clear the
 569   // button title.
 570   NSButton* button = GetItemViewAt(kTestItemIndex);
 571   NSView* containerView = [button superview];
 572   EXPECT_EQ(1u, [[containerView subviews] count]);
 573   EXPECT_NSEQ(@"Item 16", [button title]);
 574   model()->HighlightItemAt(kTestItemIndex);
 575   item_model->SetIsInstalling(true);
 576   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 577
 578   EXPECT_EQ(2u, [[containerView subviews] count]);
 579   EXPECT_NSEQ(@"", [button title]);
 580   NSProgressIndicator* progressIndicator =
 581       [[containerView subviews] objectAtIndex:1];
 582   EXPECT_FALSE([progressIndicator isIndeterminate]);
 583   EXPECT_EQ(0.0, [progressIndicator doubleValue]);
 584
 585   // Updating the progress in the model should update the progress bar.
 586   item_model->SetPercentDownloaded(50);
 587   EXPECT_EQ(50.0, [progressIndicator doubleValue]);
 588
 589   // Two things can be installing simultaneously. When one starts or completes
 590   // the model builder will ask for the item to be highlighted.
 591   const int kAlternateTestItemIndex = 0;
 592   model()->HighlightItemAt(kAlternateTestItemIndex);
 593   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 594
 595   // Update the first item (page doesn't change on updates).
 596   item_model->SetPercentDownloaded(100);
 597   EXPECT_EQ(100.0, [progressIndicator doubleValue]);
 598   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 599
 600   // A percent of -1 indicates the download is complete and the unpack/install
 601   // process has started.
 602   item_model->SetPercentDownloaded(-1);
 603   EXPECT_TRUE([progressIndicator isIndeterminate]);
 604
 605   // Completing install removes the progress bar, and restores the title.
 606   // ExtensionAppModelBuilder will reload the ExtensionAppItem, which also
 607   // highlights. Do the same here.
 608   model()->HighlightItemAt(kTestItemIndex);
 609   item_model->SetIsInstalling(false);
 610   EXPECT_EQ(1u, [[containerView subviews] count]);
 611   EXPECT_NSEQ(@"Item 16", [button title]);
 612   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 613
 614   // Things should cleanup OK with |alternate_item_model| left installing.
 615 }
 616
 617 // Test mouseover selection.
 618 TEST_F(AppsGridControllerTest, MouseoverSelects) {
 619   model()->PopulateApps(2);
 620   EXPECT_EQ(nil, GetSelectedView());
 621
 622   // Test entering and exiting the first item.
 623   SimulateMouseEnterItemAt(0);
 624   EXPECT_EQ(GetItemViewAt(0), GetSelectedView());
 625   SimulateMouseExitItemAt(0);
 626   EXPECT_EQ(nil, GetSelectedView());
 627
 628   // AppKit doesn't guarantee the order, so test moving between items.
 629   SimulateMouseEnterItemAt(0);
 630   EXPECT_EQ(GetItemViewAt(0), GetSelectedView());
 631   SimulateMouseEnterItemAt(1);
 632   EXPECT_EQ(GetItemViewAt(1), GetSelectedView());
 633   SimulateMouseExitItemAt(0);
 634   EXPECT_EQ(GetItemViewAt(1), GetSelectedView());
 635   SimulateMouseExitItemAt(1);
 636   EXPECT_EQ(nil, GetSelectedView());
 637 }
 638
 639 // Test AppsGridPaginationObserver totalPagesChanged().
 640 TEST_F(AppsGridControllerTest, PaginationObserverPagesChanged) {
 641   base::scoped_nsobject<TestPaginationObserver> observer(
 642       [[TestPaginationObserver alloc] init]);
 643   [apps_grid_controller_ setPaginationObserver:observer];
 644
 645   // Test totalPagesChanged.
 646   model()->PopulateApps(kItemsPerPage);
 647   EXPECT_EQ(0, [observer totalPagesChangedCount]);
 648   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 649   model()->PopulateApps(1);
 650   EXPECT_EQ(1, [observer totalPagesChangedCount]);
 651   EXPECT_EQ(2u, [apps_grid_controller_ pageCount]);
 652   ReplaceTestModel(0);
 653   EXPECT_EQ(2, [observer totalPagesChangedCount]);
 654   EXPECT_EQ(1u, [apps_grid_controller_ pageCount]);
 655   ReplaceTestModel(kItemsPerPage * 3 + 1);
 656   EXPECT_EQ(3, [observer totalPagesChangedCount]);
 657   EXPECT_EQ(4u, [apps_grid_controller_ pageCount]);
 658
 659   EXPECT_FALSE([observer readVisibilityDidChange]);
 660   EXPECT_EQ(0, [observer selectedPageChangedCount]);
 661
 662   [apps_grid_controller_ setPaginationObserver:nil];
 663 }
 664
 665 // Test AppsGridPaginationObserver selectedPageChanged().
 666 TEST_F(AppsGridControllerTest, PaginationObserverSelectedPageChanged) {
 667   base::scoped_nsobject<TestPaginationObserver> observer(
 668       [[TestPaginationObserver alloc] init]);
 669   [apps_grid_controller_ setPaginationObserver:observer];
 670   EXPECT_EQ(0, [[NSAnimationContext currentContext] duration]);
 671
 672   ReplaceTestModel(kItemsPerPage * 3 + 1);
 673   EXPECT_EQ(1, [observer totalPagesChangedCount]);
 674   EXPECT_EQ(4u, [apps_grid_controller_ pageCount]);
 675
 676   EXPECT_FALSE([observer readVisibilityDidChange]);
 677   EXPECT_EQ(0, [observer selectedPageChangedCount]);
 678
 679   [apps_grid_controller_ scrollToPage:1];
 680   EXPECT_EQ(1, [observer selectedPageChangedCount]);
 681   EXPECT_EQ(1, [observer lastNewSelectedPage]);
 682   EXPECT_TRUE([observer readVisibilityDidChange]);
 683   EXPECT_FALSE([observer readVisibilityDidChange]);  // Testing test behaviour.
 684   EXPECT_EQ(0.0, [apps_grid_controller_ visiblePortionOfPage:0]);
 685   EXPECT_EQ(1.0, [apps_grid_controller_ visiblePortionOfPage:1]);
 686   EXPECT_EQ(0.0, [apps_grid_controller_ visiblePortionOfPage:2]);
 687   EXPECT_EQ(0.0, [apps_grid_controller_ visiblePortionOfPage:3]);
 688
 689   [apps_grid_controller_ scrollToPage:0];
 690   EXPECT_EQ(2, [observer selectedPageChangedCount]);
 691   EXPECT_EQ(0, [observer lastNewSelectedPage]);
 692   EXPECT_TRUE([observer readVisibilityDidChange]);
 693   EXPECT_EQ(1.0, [apps_grid_controller_ visiblePortionOfPage:0]);
 694   EXPECT_EQ(0.0, [apps_grid_controller_ visiblePortionOfPage:1]);
 695
 696   [apps_grid_controller_ scrollToPage:3];
 697   // Note: with no animations, there is only a single page change. However, with
 698   // animations we expect multiple updates depending on the rate that the scroll
 699   // view updates and sends out NSViewBoundsDidChangeNotification.
 700   EXPECT_EQ(3, [observer selectedPageChangedCount]);
 701   EXPECT_EQ(3, [observer lastNewSelectedPage]);
 702   EXPECT_TRUE([observer readVisibilityDidChange]);
 703   EXPECT_EQ(0.0, [apps_grid_controller_ visiblePortionOfPage:0]);
 704   EXPECT_EQ(1.0, [apps_grid_controller_ visiblePortionOfPage:3]);
 705
 706   [apps_grid_controller_ setPaginationObserver:nil];
 707 }
 708
 709 // Test basic item moves with two items; swapping them around, dragging outside
 710 // of the view bounds, and dragging on the background.
 711 TEST_F(AppsGridControllerTest, DragAndDropSimple) {
 712   model()->PopulateApps(2);
 713   NSCollectionView* page = [apps_grid_controller_ collectionViewAtPageIndex:0];
 714   NSEvent* mouse_at_cell_0 = MouseEventInCell(page, 0);
 715   NSEvent* mouse_at_cell_1 = MouseEventInCell(page, 1);
 716   NSEvent* mouse_at_page_centre = MouseEventInCell(page, 6);
 717   NSEvent* mouse_off_page = MouseEventInCell(page, kItemsPerPage * 2);
 718
 719   const std::string kOrdered = "Item 0,Item 1";
 720   const std::string kSwapped = "Item 1,Item 0";
 721   const std::string kOrderedView = "|Item 0,Item 1|";
 722   const std::string kSwappedView = "|Item 1,Item 0|";
 723
 724   EXPECT_EQ(kOrdered, model()->GetModelContent());
 725   EXPECT_EQ(kOrderedView, GetViewContent());
 726   AppsCollectionViewDragManager* drag_manager =
 727       [apps_grid_controller_ dragManager];
 728
 729   // Drag first item over the second item and release.
 730   [drag_manager onMouseDownInPage:page
 731                         withEvent:mouse_at_cell_0];
 732   [drag_manager onMouseDragged:mouse_at_cell_1];
 733   EXPECT_EQ(kOrdered, model()->GetModelContent());
 734   EXPECT_EQ(kSwappedView, GetViewContent());  // View swaps first.
 735   [drag_manager onMouseUp:mouse_at_cell_1];
 736   EXPECT_EQ(kSwapped, model()->GetModelContent());
 737   EXPECT_EQ(kSwappedView, GetViewContent());
 738
 739   // Drag item back.
 740   [drag_manager onMouseDownInPage:page
 741                         withEvent:mouse_at_cell_1];
 742   [drag_manager onMouseDragged:mouse_at_cell_0];
 743   EXPECT_EQ(kSwapped, model()->GetModelContent());
 744   EXPECT_EQ(kOrderedView, GetViewContent());
 745   [drag_manager onMouseUp:mouse_at_cell_0];
 746   EXPECT_EQ(kOrdered, model()->GetModelContent());
 747   EXPECT_EQ(kOrderedView, GetViewContent());
 748
 749   // Drag first item to centre of view (should put in last place).
 750   [drag_manager onMouseDownInPage:page
 751                         withEvent:mouse_at_cell_0];
 752   [drag_manager onMouseDragged:mouse_at_page_centre];
 753   EXPECT_EQ(kOrdered, model()->GetModelContent());
 754   EXPECT_EQ(kSwappedView, GetViewContent());
 755   [drag_manager onMouseUp:mouse_at_page_centre];
 756   EXPECT_EQ(kSwapped, model()->GetModelContent());
 757   EXPECT_EQ(kSwappedView, GetViewContent());
 758
 759   // Drag item to centre again (should leave it in the last place).
 760   [drag_manager onMouseDownInPage:page
 761                         withEvent:mouse_at_cell_1];
 762   [drag_manager onMouseDragged:mouse_at_page_centre];
 763   EXPECT_EQ(kSwapped, model()->GetModelContent());
 764   EXPECT_EQ(kSwappedView, GetViewContent());
 765   [drag_manager onMouseUp:mouse_at_page_centre];
 766   EXPECT_EQ(kSwapped, model()->GetModelContent());
 767   EXPECT_EQ(kSwappedView, GetViewContent());
 768
 769   // Drag starting in the centre of the view, should do nothing.
 770   [drag_manager onMouseDownInPage:page
 771                         withEvent:mouse_at_page_centre];
 772   [drag_manager onMouseDragged:mouse_at_cell_0];
 773   EXPECT_EQ(kSwapped, model()->GetModelContent());
 774   EXPECT_EQ(kSwappedView, GetViewContent());
 775   [drag_manager onMouseUp:mouse_at_cell_0];
 776   EXPECT_EQ(kSwapped, model()->GetModelContent());
 777   EXPECT_EQ(kSwappedView, GetViewContent());
 778
 779   // Click off page.
 780   [drag_manager onMouseDownInPage:page
 781                         withEvent:mouse_off_page];
 782   [drag_manager onMouseDragged:mouse_at_cell_0];
 783   EXPECT_EQ(kSwapped, model()->GetModelContent());
 784   EXPECT_EQ(kSwappedView, GetViewContent());
 785   [drag_manager onMouseUp:mouse_at_cell_0];
 786   EXPECT_EQ(kSwapped, model()->GetModelContent());
 787   EXPECT_EQ(kSwappedView, GetViewContent());
 788
 789   // Drag to first over second item, then off page.
 790   [drag_manager onMouseDownInPage:page
 791                         withEvent:mouse_at_cell_0];
 792   [drag_manager onMouseDragged:mouse_at_cell_1];
 793   EXPECT_EQ(kSwapped, model()->GetModelContent());
 794   EXPECT_EQ(kOrderedView, GetViewContent());
 795   [drag_manager onMouseDragged:mouse_off_page];
 796   EXPECT_EQ(kSwapped, model()->GetModelContent());
 797   EXPECT_EQ(kOrderedView, GetViewContent());
 798   [drag_manager onMouseUp:mouse_off_page];
 799   EXPECT_EQ(kOrdered, model()->GetModelContent());
 800   EXPECT_EQ(kOrderedView, GetViewContent());
 801
 802   // Replace with an empty model, and ensure we do not break.
 803   ReplaceTestModel(0);
 804   EXPECT_EQ(std::string(), model()->GetModelContent());
 805   EXPECT_EQ(std::string("||"), GetViewContent());
 806   [drag_manager onMouseDownInPage:page
 807                         withEvent:mouse_at_cell_0];
 808   [drag_manager onMouseDragged:mouse_at_cell_1];
 809   [drag_manager onMouseUp:mouse_at_cell_1];
 810   EXPECT_EQ(std::string(), model()->GetModelContent());
 811   EXPECT_EQ(std::string("||"), GetViewContent());
 812 }
 813
 814 // Test item moves between pages.
 815 TEST_F(AppsGridControllerTest, DragAndDropMultiPage) {
 816   const size_t kPagesToTest = 3;
 817   // Put one item on the last page to hit more edge cases.
 818   ReplaceTestModel(kItemsPerPage * (kPagesToTest - 1) + 1);
 819   NSCollectionView* page[kPagesToTest];
 820   for (size_t i = 0; i < kPagesToTest; ++i)
 821     page[i] = [apps_grid_controller_ collectionViewAtPageIndex:i];
 822
 823   const std::string kSecondItemMovedToSecondPage =
 824       "|Item 0,Item 2,Item 3,Item 4,Item 5,Item 6,Item 7,Item 8,"
 825       "Item 9,Item 10,Item 11,Item 12,Item 13,Item 14,Item 15,Item 16|"
 826       "|Item 17,Item 1,Item 18,Item 19,Item 20,Item 21,Item 22,Item 23,"
 827       "Item 24,Item 25,Item 26,Item 27,Item 28,Item 29,Item 30,Item 31|"
 828       "|Item 32|";
 829
 830   NSEvent* mouse_at_cell_0 = MouseEventInCell(page[0], 0);
 831   NSEvent* mouse_at_cell_1 = MouseEventInCell(page[0], 1);
 832   AppsCollectionViewDragManager* drag_manager =
 833       [apps_grid_controller_ dragManager];
 834   [drag_manager onMouseDownInPage:page[0]
 835                         withEvent:mouse_at_cell_1];
 836
 837   // Initiate dragging before changing pages.
 838   [drag_manager onMouseDragged:mouse_at_cell_0];
 839
 840   // Scroll to the second page.
 841   [apps_grid_controller_ scrollToPage:1];
 842   [drag_manager onMouseDragged:mouse_at_cell_1];
 843
 844   // Do one exhaustive check, and then spot-check corner cases.
 845   EXPECT_EQ(kSecondItemMovedToSecondPage, GetViewContent());
 846   EXPECT_EQ(0u, GetPageIndexForItem(0));
 847   EXPECT_EQ(1u, GetPageIndexForItem(1));
 848   EXPECT_EQ(0u, GetPageIndexForItem(2));
 849   EXPECT_EQ(0u, GetPageIndexForItem(16));
 850   EXPECT_EQ(1u, GetPageIndexForItem(17));
 851   EXPECT_EQ(1u, GetPageIndexForItem(31));
 852   EXPECT_EQ(2u, GetPageIndexForItem(32));
 853
 854   // Scroll to the third page and drag some more.
 855   [apps_grid_controller_ scrollToPage:2];
 856   [drag_manager onMouseDragged:mouse_at_cell_1];
 857   EXPECT_EQ(2u, GetPageIndexForItem(1));
 858   EXPECT_EQ(1u, GetPageIndexForItem(31));
 859   EXPECT_EQ(1u, GetPageIndexForItem(32));
 860
 861   // Scroll backwards.
 862   [apps_grid_controller_ scrollToPage:1];
 863   [drag_manager onMouseDragged:mouse_at_cell_1];
 864   EXPECT_EQ(kSecondItemMovedToSecondPage, GetViewContent());
 865   EXPECT_EQ(1u, GetPageIndexForItem(1));
 866   EXPECT_EQ(1u, GetPageIndexForItem(31));
 867   EXPECT_EQ(2u, GetPageIndexForItem(32));
 868
 869   // Simulate installing an item while dragging (or have it appear during sync).
 870   model()->PopulateAppWithId(33);
 871   // Item should go back to its position before the drag.
 872   EXPECT_EQ(0u, GetPageIndexForItem(1));
 873   EXPECT_EQ(1u, GetPageIndexForItem(31));
 874   EXPECT_EQ(2u, GetPageIndexForItem(32));
 875   // New item should appear at end.
 876   EXPECT_EQ(2u, GetPageIndexForItem(33));
 877
 878   // Scroll to end again, and keep dragging (should be ignored).
 879   [apps_grid_controller_ scrollToPage:2];
 880   [drag_manager onMouseDragged:mouse_at_cell_0];
 881   EXPECT_EQ(0u, GetPageIndexForItem(1));
 882   [drag_manager onMouseUp:mouse_at_cell_0];
 883   EXPECT_EQ(0u, GetPageIndexForItem(1));
 884 }
 885
 886 // Test scrolling when dragging past edge or over the pager.
 887 TEST_F(AppsGridControllerTest, ScrollingWhileDragging) {
 888   base::scoped_nsobject<TestPaginationObserver> observer(
 889       [[TestPaginationObserver alloc] init]);
 890   [apps_grid_controller_ setPaginationObserver:observer];
 891
 892   ReplaceTestModel(kItemsPerPage * 3);
 893   // Start on the middle page.
 894   [apps_grid_controller_ scrollToPage:1];
 895   NSCollectionView* page = [apps_grid_controller_ collectionViewAtPageIndex:1];
 896   NSEvent* mouse_at_cell_0 = MouseEventInCell(page, 0);
 897
 898   NSEvent* at_center = MouseEventForScroll([apps_grid_controller_ view], 0.0);
 899   NSEvent* at_left = MouseEventForScroll([apps_grid_controller_ view], -1.1);
 900   NSEvent* at_right = MouseEventForScroll([apps_grid_controller_ view], 1.1);
 901
 902   AppsCollectionViewDragManager* drag_manager =
 903       [apps_grid_controller_ dragManager];
 904   [drag_manager onMouseDownInPage:page
 905                         withEvent:mouse_at_cell_0];
 906   [drag_manager onMouseDragged:at_center];
 907
 908   // Nothing should be scheduled: target page is visible page.
 909   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 910   EXPECT_EQ(1u, [apps_grid_controller_ scheduledScrollPage]);
 911
 912   // Drag to the left, should go to first page and no further.
 913   [drag_manager onMouseDragged:at_left];
 914   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 915   EXPECT_EQ(0u, [apps_grid_controller_ scheduledScrollPage]);
 916   [apps_grid_controller_ scrollToPage:0];  // Commit without timer for testing.
 917   [drag_manager onMouseDragged:at_left];
 918   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 919   EXPECT_EQ(0u, [apps_grid_controller_ scheduledScrollPage]);
 920
 921   // Drag to the right, should go to last page and no futher.
 922   [drag_manager onMouseDragged:at_right];
 923   EXPECT_EQ(0u, [apps_grid_controller_ visiblePage]);
 924   EXPECT_EQ(1u, [apps_grid_controller_ scheduledScrollPage]);
 925   [apps_grid_controller_ scrollToPage:1];
 926   [drag_manager onMouseDragged:at_right];
 927   EXPECT_EQ(1u, [apps_grid_controller_ visiblePage]);
 928   EXPECT_EQ(2u, [apps_grid_controller_ scheduledScrollPage]);
 929   [apps_grid_controller_ scrollToPage:2];
 930   [drag_manager onMouseDragged:at_right];
 931   EXPECT_EQ(2u, [apps_grid_controller_ visiblePage]);
 932   EXPECT_EQ(2u, [apps_grid_controller_ scheduledScrollPage]);
 933
 934   // Simulate a hover over the first pager segment.
 935   [observer setHoveredSegmentForTest:0];
 936   [drag_manager onMouseDragged:at_center];
 937   EXPECT_EQ(2u, [apps_grid_controller_ visiblePage]);
 938   EXPECT_EQ(0u, [apps_grid_controller_ scheduledScrollPage]);
 939
 940   // Drag it back, should cancel schedule.
 941   [observer setHoveredSegmentForTest:-1];
 942   [drag_manager onMouseDragged:at_center];
 943   EXPECT_EQ(2u, [apps_grid_controller_ visiblePage]);
 944   EXPECT_EQ(2u, [apps_grid_controller_ scheduledScrollPage]);
 945
 946   // Hover again, now over middle segment, and ensure a release also cancels.
 947   [observer setHoveredSegmentForTest:1];
 948   [drag_manager onMouseDragged:at_center];
 949   EXPECT_EQ(2u, [apps_grid_controller_ visiblePage]);
 950   EXPECT_EQ(1u, [apps_grid_controller_ scheduledScrollPage]);
 951   [drag_manager onMouseUp:at_center];
 952   EXPECT_EQ(2u, [apps_grid_controller_ visiblePage]);
 953   EXPECT_EQ(2u, [apps_grid_controller_ scheduledScrollPage]);
 954
 955   [apps_grid_controller_ setPaginationObserver:nil];
 956 }
 957
 958 TEST_F(AppsGridControllerTest, ContextMenus) {
 959   AppListItemWithMenu* item_two_model = new AppListItemWithMenu("Item Two");
 960   model()->AddItem(new AppListItemWithMenu("Item One"));
 961   model()->AddItem(item_two_model);
 962   EXPECT_EQ(2u, [apps_grid_controller_ itemCount]);
 963
 964   NSCollectionView* page = [apps_grid_controller_ collectionViewAtPageIndex:0];
 965   NSEvent* mouse_at_cell_0 = MouseEventInCell(page, 0);
 966   NSEvent* mouse_at_cell_1 = MouseEventInCell(page, 1);
 967
 968   NSMenu* menu = [page menuForEvent:mouse_at_cell_0];
 969   EXPECT_EQ(1, [menu numberOfItems]);
 970   EXPECT_NSEQ(@"Menu For: Item One", [[menu itemAtIndex:0] title]);
 971
 972   // Test a context menu request while the item is still installing.
 973   item_two_model->SetMenuReadyForTesting(false);
 974   menu = [page menuForEvent:mouse_at_cell_1];
 975   EXPECT_EQ(nil, menu);
 976
 977   item_two_model->SetMenuReadyForTesting(true);
 978   menu = [page menuForEvent:mouse_at_cell_1];
 979   EXPECT_EQ(1, [menu numberOfItems]);
 980   EXPECT_NSEQ(@"Menu For: Item Two", [[menu itemAtIndex:0] title]);
 981
 982   // Test that a button being held down with the left button does not also show
 983   // a context menu.
 984   [GetItemViewAt(0) highlight:YES];
 985   EXPECT_FALSE([page menuForEvent:mouse_at_cell_0]);
 986   [GetItemViewAt(0) highlight:NO];
 987   EXPECT_TRUE([page menuForEvent:mouse_at_cell_0]);
 988 }
 989
 990 }  // namespace test
 991 }  // namespace app_list