mcs/class/Managed.Windows.Forms/Test/System.Windows.Forms/ListViewTest.cs

   1 //
   2 // ListViewTest.cs: Test cases for ListView.
   3 //
   4 // Author:
   5 //   Ritvik Mayank (mritvik@novell.com)
   6 //
   7 // (C) 2005 Novell, Inc. (http://www.novell.com)
   8 //
   9
  10 using System;
  11 using System.Collections;
  12 using System.Drawing;
  13 using System.Reflection;
  14 using System.Windows.Forms;
  15
  16 using NUnit.Framework;
  17
  18 namespace MonoTests.System.Windows.Forms
  19 {
  20         [TestFixture]
  21         public class ListViewTest
  22         {
  23                 [Test]
  24                 public void ListViewPropertyTest ()
  25                 {
  26                         ListView mylistview = new ListView ();
  27                         Assert.AreEqual (ItemActivation.Standard, mylistview.Activation, "#1");
  28                         Assert.AreEqual (ListViewAlignment.Top, mylistview.Alignment, "#2");
  29                         Assert.AreEqual (false, mylistview.AllowColumnReorder, "#3");
  30                         Assert.AreEqual (true, mylistview.AutoArrange, "#4");
  31                         Assert.AreEqual (BorderStyle.Fixed3D , mylistview.BorderStyle, "#5");
  32                         Assert.AreEqual (false, mylistview.CheckBoxes, "#6");
  33                         Assert.AreEqual (0, mylistview.CheckedIndices.Count, "#7");
  34                         Assert.AreEqual (0, mylistview.CheckedItems.Count, "#8");
  35                         Assert.AreEqual (0, mylistview.Columns.Count, "#9");
  36                         Assert.AreEqual (null, mylistview.FocusedItem, "#10");
  37                         Assert.AreEqual (false, mylistview.FullRowSelect, "#11");
  38                         Assert.AreEqual (false, mylistview.GridLines, "#12");
  39                         Assert.AreEqual (ColumnHeaderStyle.Clickable, mylistview.HeaderStyle, "#13");
  40                         Assert.AreEqual (true, mylistview.HideSelection, "#14");
  41                         Assert.AreEqual (false, mylistview.HoverSelection, "#15");
  42                         ListViewItem item1 = new ListViewItem ("A", -1);
  43                         mylistview.Items.Add (item1);
  44                         Assert.AreEqual (1, mylistview.Items.Count, "#16");
  45                         Assert.AreEqual (false, mylistview.LabelEdit, "#17");
  46                         Assert.AreEqual (true, mylistview.LabelWrap, "#18");
  47                         Assert.AreEqual (null, mylistview.LargeImageList, "#19");
  48                         Assert.AreEqual (null, mylistview.ListViewItemSorter, "#20");
  49                         Assert.AreEqual (true, mylistview.MultiSelect, "#21");
  50                         Assert.AreEqual (true, mylistview.Scrollable, "#22");
  51                         Assert.AreEqual (0, mylistview.SelectedIndices.Count, "#23");
  52                         Assert.AreEqual (0, mylistview.SelectedItems.Count, "#24");
  53                         Assert.AreEqual (null, mylistview.SmallImageList, "#25");
  54                         Assert.AreEqual (null, mylistview.LargeImageList, "#26");
  55                         Assert.AreEqual (SortOrder.None, mylistview.Sorting, "#27");
  56                         Assert.AreEqual (null, mylistview.StateImageList, "#28");
  57                         Assert.AreEqual (View.LargeIcon, mylistview.View, "#29");
  58                         mylistview.View = View.List;
  59                         Assert.AreEqual (false, mylistview.TopItem.Checked, "#30");
  60 #if NET_2_0
  61                         Assert.AreEqual (false, mylistview.ShowItemToolTips, "#31");
  62                         Assert.AreEqual (false, mylistview.HotTracking, "#31");
  63 #endif
  64                 }
  65
  66                 [Test]
  67                 public void ArrangeIconsTest ()
  68                 {
  69                         Form myform = new Form ();
  70                         myform.ShowInTaskbar = false;
  71                         ListView mylistview = new ListView ();
  72                         myform.Controls.Add (mylistview);
  73                         mylistview.Items.Add ("Item 1");
  74                         mylistview.Items.Add ("Item 2");
  75                         mylistview.View = View.LargeIcon;
  76                         mylistview.ArrangeIcons ();
  77                         myform.Dispose ();
  78                 }
  79
  80                 [Test]
  81                 public void BeginEndUpdateTest ()
  82                 {
  83                         Form myform = new Form ();
  84                         myform.ShowInTaskbar = false;
  85                         myform.Visible = true;
  86                         ListView mylistview = new ListView();
  87                         mylistview.Items.Add ("A");
  88                         mylistview.Visible = true;
  89                         myform.Controls.Add (mylistview);
  90                         mylistview.BeginUpdate ();
  91                         for(int x = 1 ; x < 5000 ; x++){
  92                                 mylistview.Items.Add ("Item " + x.ToString());
  93                         }
  94                         mylistview.EndUpdate ();
  95                         myform.Dispose ();
  96                 }
  97
  98                 [Test]
  99                 public void CheckBoxes ()
 100                 {
 101                         Form form = new Form ();
 102                         form.ShowInTaskbar = false;
 103                         ListView lvw = new ListView ();
 104                         form.Controls.Add (lvw);
 105                         lvw.Items.Add ("A");
 106                         ListViewItem itemB = lvw.Items.Add ("B");
 107                         lvw.Items.Add ("C");
 108                         itemB.Checked = true;
 109
 110                         Assert.AreEqual (0, lvw.CheckedItems.Count, "#A1");
 111                         Assert.AreEqual (0, lvw.CheckedIndices.Count, "#A2");
 112
 113                         lvw.CheckBoxes = true;
 114
 115                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#B1");
 116                         Assert.AreSame (itemB, lvw.CheckedItems [0], "#B2");
 117                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#B3");
 118                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#B4");
 119
 120                         form.Show ();
 121
 122                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#C1");
 123                         Assert.AreSame (itemB, lvw.CheckedItems [0], "#C2");
 124                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#C3");
 125                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#C4");
 126
 127                         lvw.CheckBoxes = false;
 128
 129                         Assert.AreEqual (0, lvw.CheckedItems.Count, "#D1");
 130                         Assert.AreEqual (0, lvw.CheckedIndices.Count, "#D2");
 131
 132                         lvw.CheckBoxes = true;
 133
 134                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#E1");
 135                         Assert.AreSame (itemB, lvw.CheckedItems [0], "#E2");
 136                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#E3");
 137                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#E4");
 138                         form.Dispose ();
 139                 }
 140
 141                 [Test]
 142                 public void ClearTest ()
 143                 {
 144                         Form myform = new Form ();
 145                         myform.ShowInTaskbar = false;
 146                         myform.Visible = true;
 147                         ListView mylistview = new ListView ();
 148                         ListViewItem itemA = mylistview.Items.Add ("A");
 149                         ColumnHeader colA = mylistview.Columns.Add ("Item Column", -2, HorizontalAlignment.Left);
 150                         Assert.AreSame (mylistview, itemA.ListView, "#1");
 151                         Assert.AreSame (mylistview, colA.ListView, "#2");
 152                         mylistview.Visible = true;
 153                         myform.Controls.Add (mylistview);
 154                         Assert.AreEqual (1, mylistview.Columns.Count, "#3");
 155                         Assert.AreEqual (1, mylistview.Items.Count, "#4");
 156                         mylistview.Clear ();
 157                         Assert.AreEqual (0, mylistview.Columns.Count, "#5");
 158                         Assert.AreEqual (0, mylistview.Items.Count, "#6");
 159                         Assert.IsNull (itemA.ListView, "#7");
 160                         Assert.IsNull (colA.ListView, "#8");
 161                         myform.Dispose ();
 162                 }
 163
 164                 [Test] // bug #80620
 165                 public void ClientRectangle_Borders ()
 166                 {
 167                         ListView lv = new ListView ();
 168                         lv.CreateControl ();
 169                         Assert.AreEqual (lv.ClientRectangle, new ListView ().ClientRectangle);
 170                 }
 171
 172                 [Test]
 173                 public void DisposeTest ()
 174                 {
 175                         ListView lv = new ListView ();
 176                         lv.View = View.Details;
 177
 178                         lv.LargeImageList = new ImageList ();
 179                         lv.SmallImageList = new ImageList ();
 180
 181                         ListViewItem lvi = new ListViewItem ();
 182                         lv.Items.Add (lvi);
 183
 184                         ColumnHeader col = new ColumnHeader ();
 185                         lv.Columns.Add (col);
 186
 187                         lv.Dispose ();
 188
 189                         Assert.IsNull (lvi.ListView, "#A1");
 190                         Assert.IsNull (col.ListView, "#A2");
 191
 192                         Assert.IsNull (lv.LargeImageList, "#B1");
 193                         Assert.IsNull (lv.SmallImageList, "#B2");
 194                         Assert.IsNull(lv.StateImageList, "#B3");
 195                 }
 196
 197                 [Test]
 198                 public void EnsureVisibleTest ()
 199                 {
 200                         Form myform = new Form ();
 201                         myform.ShowInTaskbar = false;
 202                         myform.Visible = true;
 203                         ListView mylistview = new ListView ();
 204                         mylistview.Items.Add ("A");
 205                         myform.Controls.Add (mylistview);
 206                         mylistview.BeginUpdate ();
 207                         for(int x = 1 ; x < 5000 ; x++) {
 208                                 mylistview.Items.Add ("Item " + x.ToString());
 209                         }
 210                         mylistview.EndUpdate ();
 211                         mylistview.EnsureVisible (4999);
 212                         myform.Dispose ();
 213                 }
 214
 215                 [Test]
 216                 public void GetItemRectTest ()
 217                 {
 218                         ListView mylistview = new ListView ();
 219                         mylistview.Items.Add ("Item 1");
 220                         mylistview.Items.Add ("Item 2");
 221                         Rectangle r = mylistview.GetItemRect (1);
 222                         Assert.AreEqual (0, r.Top, "#35a");
 223                         Assert.IsTrue (r.Bottom > 0, "#35b");
 224                         Assert.IsTrue (r.Right > 0, "#35c");
 225                         Assert.IsTrue (r.Left > 0, "#35d");
 226                         Assert.IsTrue (r.Height > 0, "#35e");
 227                         Assert.IsTrue (r.Width > 0, "#35f");
 228                 }
 229
 230                 [Test]
 231                 public void bug79076 ()
 232                 {
 233                         ListView entryList = new ListView ();
 234                         entryList.Sorting = SortOrder.Descending;
 235
 236                         entryList.BeginUpdate ();
 237                         entryList.Columns.Add ("Type", 100, HorizontalAlignment.Left);
 238
 239                         ListViewItem item = new ListViewItem (new string [] { "A" });
 240                         entryList.Items.Add (item);
 241                         item = new ListViewItem (new string [] { "B" });
 242                         entryList.Items.Add (item);
 243                 }
 244
 245                 [Test] // bug #79416
 246                 public void MultiSelect ()
 247                 {
 248                         Form form = new Form ();
 249                         form.ShowInTaskbar = false;
 250                         ListView lvw = CreateListView (View.Details);
 251                         form.Controls.Add (lvw);
 252                         lvw.MultiSelect = true;
 253                         lvw.Items [0].Selected = true;
 254                         lvw.Items [2].Selected = true;
 255
 256                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#A1");
 257                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#A2");
 258
 259                         lvw.Items [0].Selected = false;
 260
 261                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#B1");
 262                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#B2");
 263
 264                         lvw.Items [0].Selected = true;
 265
 266                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#C1");
 267                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#C2");
 268
 269                         form.Show ();
 270
 271                         Assert.AreEqual (2, lvw.SelectedItems.Count, "#D1");
 272                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#D2");
 273                         Assert.AreEqual ("C", lvw.SelectedItems [1].Text, "#D3");
 274                         Assert.AreEqual (2, lvw.SelectedIndices.Count, "#D4");
 275                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#D5");
 276                         Assert.AreEqual (2, lvw.SelectedIndices [1], "#D6");
 277
 278                         // de-select an item
 279                         lvw.Items [2].Selected = false;
 280
 281                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#E1");
 282                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#E2");
 283                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#E3");
 284                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#E4");
 285
 286                         // re-select that item
 287                         lvw.Items [2].Selected = true;
 288
 289                         Assert.AreEqual (2, lvw.SelectedItems.Count, "#F1");
 290                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#F2");
 291                         Assert.AreEqual ("C", lvw.SelectedItems [1].Text, "#F3");
 292                         Assert.AreEqual (2, lvw.SelectedIndices.Count, "#F4");
 293                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#F5");
 294                         Assert.AreEqual (2, lvw.SelectedIndices [1], "#F6");
 295
 296                         // dis-allow selection of multiple items
 297                         lvw.MultiSelect = false;
 298
 299                         // setting MultiSelect to false when multiple items have been
 300                         // selected does not deselect items
 301                         Assert.AreEqual (2, lvw.SelectedItems.Count, "#G1");
 302                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#G2");
 303                         Assert.AreEqual ("C", lvw.SelectedItems [1].Text, "#G3");
 304                         Assert.AreEqual (2, lvw.SelectedIndices.Count, "#G4");
 305                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#G5");
 306                         Assert.AreEqual (2, lvw.SelectedIndices [1], "#G6");
 307
 308                         // de-select that item again
 309                         lvw.Items [2].Selected = false;
 310
 311                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#H1");
 312                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#H2");
 313                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#H3");
 314                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#H4");
 315
 316                         // re-select that item again
 317                         lvw.Items [2].Selected = true;
 318
 319                         // when MultiSelect is false, and you attempt to select more than
 320                         // one item, then all items will first be de-selected and then
 321                         // the item in question is selected
 322                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#I1");
 323                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#I2");
 324                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#I3");
 325                         Assert.AreEqual (2, lvw.SelectedIndices [0], "#I4");
 326                         form.Dispose ();
 327                 }
 328
 329                 [Test]
 330                 public void Selected ()
 331                 {
 332                         Form form = new Form ();
 333                         form.ShowInTaskbar = false;
 334                         ListView lvw = CreateListView (View.Details);
 335                         form.Controls.Add (lvw);
 336                         lvw.MultiSelect = true;
 337                         lvw.Items [0].Selected = true;
 338                         lvw.Items [2].Selected = true;
 339
 340                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#A1");
 341                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#A2");
 342
 343                         form.Show ();
 344
 345                         Assert.AreEqual (2, lvw.SelectedItems.Count, "#C1");
 346                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#C2");
 347                         Assert.AreEqual ("C", lvw.SelectedItems [1].Text, "#C3");
 348                         Assert.AreEqual (2, lvw.SelectedIndices.Count, "#C4");
 349                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#C5");
 350                         Assert.AreEqual (2, lvw.SelectedIndices [1], "#C6");
 351                         form.Dispose ();
 352                 }
 353
 354 #if NET_2_0
 355                 [Test]
 356                 public void FindItemWithText ()
 357                 {
 358                         ListView lvw = new ListView();
 359                         ListViewItem lvi1 = new ListViewItem (String.Empty);
 360                         ListViewItem lvi2 = new ListViewItem ("angle bracket");
 361                         ListViewItem lvi3 = new ListViewItem ("bracket holder");
 362                         ListViewItem lvi4 = new ListViewItem ("bracket");
 363                         lvw.Items.AddRange (new ListViewItem [] { lvi1, lvi2, lvi3, lvi4 });
 364
 365                         Assert.AreEqual (lvi1, lvw.FindItemWithText (String.Empty), "#A1");
 366                         Assert.AreEqual (lvi3, lvw.FindItemWithText ("bracket"), "#A2");
 367                         Assert.AreEqual (lvi3, lvw.FindItemWithText ("BrackeT"), "#A3");
 368                         Assert.IsNull (lvw.FindItemWithText ("holder"), "#A5");
 369
 370                         Assert.AreEqual (lvw.Items [3], lvw.FindItemWithText ("bracket", true, 3), "#B1");
 371
 372                         Assert.AreEqual (lvw.Items [2], lvw.FindItemWithText ("bracket", true, 0, true), "#C1");
 373                         Assert.AreEqual (lvw.Items [3], lvw.FindItemWithText ("bracket", true, 0, false), "#C2");
 374                         Assert.AreEqual(lvw.Items [3], lvw.FindItemWithText("BrackeT", true, 0, false), "#C3");
 375                         Assert.IsNull (lvw.FindItemWithText ("brack", true, 0, false), "#C4");
 376
 377                         // Sub item search tests
 378                         lvw.Items.Clear ();
 379
 380                         lvi1.Text = "A";
 381                         lvi1.SubItems.Add ("car bracket");
 382                         lvi1.SubItems.Add ("C");
 383
 384                         lvi2.Text = "B";
 385                         lvi2.SubItems.Add ("car");
 386
 387                         lvi3.Text = "C";
 388
 389                         lvw.Items.AddRange (new ListViewItem [] { lvi1, lvi2, lvi3 });
 390
 391                         Assert.AreEqual (lvi1, lvw.FindItemWithText ("car", true, 0), "#D1");
 392                         Assert.AreEqual (lvi3, lvw.FindItemWithText ("C", true, 0), "#D2");
 393                         Assert.AreEqual (lvi2, lvw.FindItemWithText ("car", true, 1), "#D3");
 394                         Assert.IsNull (lvw.FindItemWithText ("car", false, 0), "#D4");
 395
 396                         Assert.AreEqual (lvi1, lvw.FindItemWithText ("car", true, 0, true), "#E1");
 397                         Assert.AreEqual (lvi2, lvw.FindItemWithText ("car", true, 0, false), "#E2");
 398                         Assert.AreEqual (lvi2, lvw.FindItemWithText ("CaR", true, 0, false), "#E3");
 399                 }
 400
 401                 [Test]
 402                 public void FindItemWithText_Exceptions ()
 403                 {
 404                         ListView lvw = new ListView ();
 405
 406                         // Shouldn't throw any exception
 407                         lvw.FindItemWithText (null);
 408
 409                         try {
 410                                 lvw.FindItemWithText (null, false, 0);
 411                                 Assert.Fail ("#A1");
 412                         } catch (ArgumentOutOfRangeException) {
 413                         }
 414
 415                         try {
 416                                 lvw.FindItemWithText (null, false, lvw.Items.Count);
 417                                 Assert.Fail ("#A2");
 418                         } catch (ArgumentOutOfRangeException) {
 419                         }
 420
 421                         // Add a single item
 422                         lvw.Items.Add ("bracket");
 423
 424                         try {
 425                                 lvw.FindItemWithText (null);
 426                                 Assert.Fail ("#A3");
 427                         } catch (ArgumentNullException) {
 428                         }
 429
 430                         try {
 431                                 lvw.FindItemWithText ("bracket", false, -1);
 432                                 Assert.Fail ("#A4");
 433                         } catch (ArgumentOutOfRangeException) {
 434                         }
 435
 436                         try {
 437                                 lvw.FindItemWithText ("bracket", false, lvw.Items.Count);
 438                                 Assert.Fail ("#A5");
 439                         } catch (ArgumentOutOfRangeException) {
 440                         }
 441                 }
 442
 443                 [Test]
 444                 public void HotTracking ()
 445                 {
 446                         ListView lvw = new ListView ();
 447
 448                         lvw.HotTracking = true;
 449                         Assert.AreEqual (true, lvw.HotTracking, "#A1");
 450                         Assert.AreEqual (true, lvw.HoverSelection, "#A2");
 451                         Assert.AreEqual (ItemActivation.OneClick, lvw.Activation, "#A3");
 452
 453                         // HoverSelection and Activation keep the previous value
 454                         lvw.HotTracking = false;
 455                         Assert.AreEqual (false, lvw.HotTracking, "#B1");
 456                         Assert.AreEqual (true, lvw.HoverSelection, "#B2");
 457                         Assert.AreEqual (ItemActivation.OneClick, lvw.Activation, "#B3");
 458
 459                         lvw.HotTracking = true;
 460                         try {
 461                                 lvw.HoverSelection = false;
 462                                 Assert.Fail ("#C1");
 463                         } catch (ArgumentException) {
 464                         }
 465
 466                         try {
 467                                 lvw.Activation = ItemActivation.Standard;
 468                                 Assert.Fail ("#C2");
 469                         } catch (ArgumentException) {
 470                         }
 471                 }
 472
 473                 [Test]
 474                 public void RedrawItems_Exceptions ()
 475                 {
 476                         ListView lvw = new ListView ();
 477                         lvw.Items.Add ("A");
 478                         lvw.Items.Add ("B");
 479
 480                         try {
 481                                 lvw.RedrawItems (-1, 1, true);
 482                                 Assert.Fail ("#A1");
 483                         } catch (ArgumentOutOfRangeException) {
 484                         }
 485
 486                         try {
 487                                 lvw.RedrawItems (0, -1, true);
 488                                 Assert.Fail ("#A2");
 489                         } catch (ArgumentOutOfRangeException) {
 490                         }
 491
 492                         try {
 493                                 lvw.RedrawItems (lvw.Items.Count, 1, true);
 494                                 Assert.Fail ("#A3");
 495                         } catch (ArgumentOutOfRangeException) {
 496                         }
 497
 498                         try {
 499                                 lvw.RedrawItems (0, lvw.Items.Count, true);
 500                                 Assert.Fail ("#A4");
 501                         } catch (ArgumentOutOfRangeException) {
 502                         }
 503
 504                         try {
 505                                 lvw.RedrawItems (1, 0, true);
 506                                 Assert.Fail ("#A5");
 507                         } catch (ArgumentException) {
 508                         }
 509                 }
 510
 511                 const int item_count = 3;
 512                 ListViewItem [] items = new ListViewItem [item_count];
 513
 514                 [Test]
 515                 public void VirtualMode ()
 516                 {
 517                         ListView lvw = new ListView ();
 518                         lvw.VirtualListSize = item_count;
 519                         lvw.RetrieveVirtualItem += ListViewRetrieveVirtualItemHandler;
 520                         lvw.VirtualMode = true;
 521
 522                         CreateListViewItems (item_count);
 523
 524                         Assert.AreEqual (item_count, lvw.Items.Count, "#A1");
 525                         Assert.AreEqual (true, lvw.VirtualMode, "#A2");
 526
 527                         Assert.AreEqual (items [0], lvw.Items [0], "#B1");
 528                         Assert.AreEqual (items [1], lvw.Items [1], "#B2");
 529                         Assert.AreEqual (items [2], lvw.Items [2], "#B3");
 530                         Assert.AreEqual (0, lvw.Items [0].Index, "#B4");
 531                         Assert.AreEqual (1, lvw.Items [1].Index, "#B5");
 532                         Assert.AreEqual (2, lvw.Items [2].Index, "#B6");
 533                         Assert.AreEqual (lvw, lvw.Items [0].ListView, "#B7");
 534                         Assert.AreEqual (lvw, lvw.Items [1].ListView, "#B8");
 535                         Assert.AreEqual (lvw, lvw.Items [2].ListView, "#B9");
 536
 537                         // force to re-create the items, because we need a blank state
 538                         // for our items
 539                         CreateListViewItems (item_count);
 540                         items [0].Name = "A";
 541                         items [1].Name = "B";
 542                         items [2].Name = "C";
 543
 544                         Assert.AreEqual (items [0], lvw.Items ["A"], "#C1");
 545                         Assert.AreEqual (items [1], lvw.Items ["B"], "#C2");
 546                         Assert.AreEqual (items [2], lvw.Items ["C"], "#C3");
 547                         Assert.AreEqual (0, lvw.Items ["A"].Index, "#C4");
 548                         Assert.AreEqual (1, lvw.Items ["B"].Index, "#C5");
 549                         Assert.AreEqual (2, lvw.Items ["C"].Index, "#C6");
 550                         Assert.AreEqual (lvw, lvw.Items ["A"].ListView, "#C7");
 551                         Assert.AreEqual (lvw, lvw.Items ["B"].ListView, "#C8");
 552                         Assert.AreEqual (lvw, lvw.Items ["C"].ListView, "#C9");
 553                         Assert.IsNull (lvw.Items ["Invalid key"], "#C10");
 554                         Assert.IsNull (lvw.Items [String.Empty], "#C11");
 555
 556                         Assert.AreEqual (false, lvw.Items.ContainsKey (String.Empty), "#D1");
 557                         Assert.AreEqual (false, lvw.Items.ContainsKey (null), "#D2");
 558                         Assert.AreEqual (true, lvw.Items.ContainsKey ("A"), "#D3");
 559                         Assert.AreEqual (true, lvw.Items.ContainsKey ("a"), "#D4");
 560                         Assert.AreEqual (true, lvw.Items.ContainsKey ("B"), "#D5");
 561                 }
 562
 563                 void ListViewRetrieveVirtualItemHandler (object o, RetrieveVirtualItemEventArgs args)
 564                 {
 565                         args.Item = items [args.ItemIndex];
 566                 }
 567
 568                 void CreateListViewItems(int count)
 569                 {
 570                         items = new ListViewItem [count];
 571
 572                         for (int i = 0; i < count; i++)
 573                                 items [i] = new ListViewItem (String.Empty);
 574                 }
 575
 576                 [Test]
 577                 public void VirtualMode_Exceptions()
 578                 {
 579                         ListView lvw = new ListView ();
 580
 581                         lvw.Items.Add ("Simple item");
 582                         try {
 583                                 lvw.VirtualMode = true;
 584                                 Assert.Fail ("#A1");
 585                         } catch (InvalidOperationException) {
 586                         }
 587
 588                         lvw.Items.Clear();
 589                         lvw.VirtualMode = true;
 590                         lvw.VirtualListSize = 1;
 591
 592                         lvw.RetrieveVirtualItem += ListViewRetrieveVirtualItemHandler;
 593                         CreateListViewItems (1);
 594
 595                         try {
 596                                 lvw.Sort ();
 597                                 Assert.Fail ("#A3");
 598                         } catch (InvalidOperationException) {
 599                         }
 600                 }
 601
 602                 [Test]
 603                 public void VirtualListSize ()
 604                 {
 605                         ListView lvw = new ListView ();
 606
 607                         lvw.VirtualListSize = item_count;
 608                         Assert.AreEqual (item_count, lvw.VirtualListSize, "#A1");
 609                         Assert.AreEqual (0, lvw.Items.Count, "#A2");
 610
 611                         lvw.VirtualMode = true;
 612                         Assert.AreEqual (item_count, lvw.VirtualListSize, "#B1");
 613                         Assert.AreEqual (item_count, lvw.Items.Count, "#B2");
 614
 615                         lvw.VirtualMode = false;
 616                         Assert.AreEqual (item_count, lvw.VirtualListSize, "#C1");
 617                         Assert.AreEqual (0, lvw.Items.Count, "#C2");
 618                 }
 619
 620                 [Test]
 621                 public void VirtualListSize_Exceptions ()
 622                 {
 623                         ListView lvw = new ListView ();
 624                         try {
 625                                 lvw.VirtualListSize = -1;
 626                                 Assert.Fail ("#A1");
 627                         } catch (ArgumentException) {
 628                         }
 629                 }
 630 #endif
 631
 632                 [Test]
 633                 public void Sort_Details_Checked ()
 634                 {
 635                         AssertSort_Checked (View.Details);
 636                 }
 637
 638                 [Test]
 639                 public void Sort_Details_Created ()
 640                 {
 641                         AssertSortNoIcon_Created (View.Details);
 642                 }
 643
 644                 [Test]
 645                 public void Sort_Details_NotCreated ()
 646                 {
 647                         AssertSortNoIcon_NotCreated (View.Details);
 648                 }
 649
 650                 [Test]
 651                 public void Sort_Details_Selected ()
 652                 {
 653                         AssertSort_Selected (View.Details);
 654                 }
 655
 656                 [Test]
 657                 public void Sort_LargeIcon_Checked ()
 658                 {
 659                         AssertSort_Checked (View.LargeIcon);
 660                 }
 661
 662                 [Test]
 663                 public void Sort_LargeIcon_Created ()
 664                 {
 665                         AssertSortIcon_Created (View.LargeIcon);
 666                 }
 667
 668                 [Test]
 669                 public void Sort_LargeIcon_NotCreated ()
 670                 {
 671                         AssertSortIcon_NotCreated (View.LargeIcon);
 672                 }
 673
 674                 [Test]
 675                 public void Sort_LargeIcon_Selected ()
 676                 {
 677                         AssertSort_Selected (View.LargeIcon);
 678                 }
 679
 680                 [Test]
 681                 public void Sort_List_Checked ()
 682                 {
 683                         AssertSort_Checked (View.List);
 684                 }
 685
 686                 [Test]
 687                 public void Sort_List_Created ()
 688                 {
 689                         AssertSortNoIcon_Created (View.List);
 690                 }
 691
 692                 [Test]
 693                 public void Sort_List_NotCreated ()
 694                 {
 695                         AssertSortNoIcon_NotCreated (View.List);
 696                 }
 697
 698                 [Test]
 699                 public void Sort_List_Selection ()
 700                 {
 701                         AssertSort_Selected (View.List);
 702                 }
 703
 704                 [Test]
 705                 public void Sort_SmallIcon_Checked ()
 706                 {
 707                         AssertSort_Checked (View.SmallIcon);
 708                 }
 709
 710                 [Test]
 711                 public void Sort_SmallIcon_Created ()
 712                 {
 713                         AssertSortIcon_Created (View.SmallIcon);
 714                 }
 715
 716                 [Test]
 717                 public void Sort_SmallIcon_NotCreated ()
 718                 {
 719                         AssertSortIcon_NotCreated (View.SmallIcon);
 720                 }
 721
 722                 [Test]
 723                 public void Sort_SmallIcon_Selection ()
 724                 {
 725                         AssertSort_Selected (View.SmallIcon);
 726                 }
 727
 728 #if NET_2_0
 729                 [Test]
 730                 [ExpectedException (typeof (NotSupportedException))]
 731                 public void Sort_Tile_Checked ()
 732                 {
 733                         AssertSort_Checked (View.Tile);
 734                 }
 735
 736                 [Test]
 737                 public void Sort_Tile_Created ()
 738                 {
 739                         AssertSortNoIcon_Created (View.Tile);
 740                 }
 741
 742                 [Test]
 743                 public void Sort_Tile_NotCreated ()
 744                 {
 745                         AssertSortNoIcon_NotCreated (View.Tile);
 746                 }
 747
 748                 [Test]
 749                 public void Sort_Tile_Selection ()
 750                 {
 751                         AssertSort_Selected (View.Tile);
 752                 }
 753 #endif
 754
 755                 private void AssertSortIcon_Created (View view)
 756                 {
 757                         int compareCount = 0;
 758
 759                         Form form = new Form ();
 760                         form.ShowInTaskbar = false;
 761                         ListView lvw = CreateListView (view);
 762                         form.Controls.Add (lvw);
 763                         Assert.IsNull (lvw.ListViewItemSorter, "#A");
 764
 765                         form.Show ();
 766
 767                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
 768                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
 769                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
 770                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
 771
 772                         lvw.Sorting = SortOrder.None;
 773                         Assert.IsNull (lvw.ListViewItemSorter, "#C1");
 774                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
 775                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
 776                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
 777
 778                         lvw.Sorting = SortOrder.Descending;
 779                         Assert.IsNotNull (lvw.ListViewItemSorter, "#D1");
 780                         Assert.AreEqual ("C", lvw.Items [0].Text, "#D2");
 781                         Assert.AreEqual ("B", lvw.Items [1].Text, "#D3");
 782                         Assert.AreEqual ("A", lvw.Items [2].Text, "#D4");
 783
 784                         lvw.Sorting = SortOrder.Ascending;
 785                         Assert.IsNotNull (lvw.ListViewItemSorter, "#E1");
 786 #if NET_2_0
 787                         Assert.AreEqual ("A", lvw.Items [0].Text, "#E2");
 788                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
 789                         Assert.AreEqual ("C", lvw.Items [2].Text, "#E4");
 790 #else
 791                         // in .NET 1.1, changing Sorting does not have any effect for
 792                         // SmallIcon and LargeIcon view if no custom comparer is used
 793                         Assert.AreEqual ("C", lvw.Items [0].Text, "#E2");
 794                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
 795                         Assert.AreEqual ("A", lvw.Items [2].Text, "#E4");
 796 #endif
 797
 798                         lvw.Sorting = SortOrder.None;
 799                         Assert.IsNotNull (lvw.ListViewItemSorter, "#F1");
 800 #if NET_2_0
 801                         Assert.AreEqual ("A", lvw.Items [0].Text, "#F2");
 802                         Assert.AreEqual ("B", lvw.Items [1].Text, "#F3");
 803                         Assert.AreEqual ("C", lvw.Items [2].Text, "#F4");
 804 #else
 805                         // in .NET 1.1, changing Sorting does not have any effect for
 806                         // SmallIcon and LargeIcon view if no custom comparer is used
 807                         Assert.AreEqual ("C", lvw.Items [0].Text, "#E2");
 808                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
 809                         Assert.AreEqual ("A", lvw.Items [2].Text, "#E4");
 810 #endif
 811
 812                         lvw.Sorting = SortOrder.Ascending;
 813                         Assert.IsNotNull (lvw.ListViewItemSorter, "#G1");
 814 #if NET_2_0
 815                         Assert.AreEqual ("A", lvw.Items [0].Text, "#G2");
 816                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
 817                         Assert.AreEqual ("C", lvw.Items [2].Text, "#G4");
 818 #else
 819                         // in .NET 1.1, changing Sorting does not have any effect for
 820                         // SmallIcon and LargeIcon view if no custom comparer is used
 821                         Assert.AreEqual ("C", lvw.Items [0].Text, "#G2");
 822                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
 823                         Assert.AreEqual ("A", lvw.Items [2].Text, "#G4");
 824 #endif
 825
 826                         lvw.Sorting = SortOrder.Descending;
 827                         Assert.IsNotNull (lvw.ListViewItemSorter, "#G1");
 828                         Assert.AreEqual ("C", lvw.Items [0].Text, "#G2");
 829                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
 830                         Assert.AreEqual ("A", lvw.Items [2].Text, "#G4");
 831
 832                         lvw.Sorting = SortOrder.None;
 833                         Assert.IsNotNull (lvw.ListViewItemSorter, "#H1");
 834                         Assert.AreEqual ("C", lvw.Items [0].Text, "#H2");
 835                         Assert.AreEqual ("B", lvw.Items [1].Text, "#H3");
 836                         Assert.AreEqual ("A", lvw.Items [2].Text, "#H4");
 837
 838                         // when Sorting is None and a new item is added, the collection is
 839                         // sorted using the previous Sorting value
 840                         lvw.Items.Add ("BB");
 841                         Assert.IsNotNull (lvw.ListViewItemSorter, "#I1");
 842                         Assert.AreEqual ("C", lvw.Items [0].Text, "#I2");
 843                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#I3");
 844                         Assert.AreEqual ("B", lvw.Items [2].Text, "#I4");
 845                         Assert.AreEqual ("A", lvw.Items [3].Text, "#I5");
 846
 847                         lvw.Sorting = SortOrder.Ascending;
 848                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J1");
 849 #if NET_2_0
 850                         Assert.AreEqual ("A", lvw.Items [0].Text, "#J2");
 851                         Assert.AreEqual ("B", lvw.Items [1].Text, "#J3");
 852                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#J4");
 853                         Assert.AreEqual ("C", lvw.Items [3].Text, "#J5");
 854 #else
 855                         // in .NET 1.1, changing Sorting does not have any effect for
 856                         // SmallIcon and LargeIcon view if no custom comparer is used
 857                         Assert.AreEqual ("C", lvw.Items [0].Text, "#J2");
 858                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#J3");
 859                         Assert.AreEqual ("B", lvw.Items [2].Text, "#J4");
 860                         Assert.AreEqual ("A", lvw.Items [3].Text, "#J5");
 861 #endif
 862
 863                         // when Sorting is not None and a new item is added, the
 864                         // collection is re-sorted automatically
 865                         lvw.Items.Add ("BA");
 866                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K1");
 867 #if NET_2_0
 868                         Assert.AreEqual ("A", lvw.Items [0].Text, "#K2");
 869                         Assert.AreEqual ("B", lvw.Items [1].Text, "#K3");
 870                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#K4");
 871                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K5");
 872                         Assert.AreEqual ("C", lvw.Items [4].Text, "#K6");
 873 #else
 874                         // in .NET 1.1, changing Sorting does not have any effect for
 875                         // SmallIcon and LargeIcon view if no custom comparer is used
 876                         Assert.AreEqual ("C", lvw.Items [0].Text, "#K2");
 877                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#K3");
 878                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#K4");
 879                         Assert.AreEqual ("B", lvw.Items [3].Text, "#K5");
 880                         Assert.AreEqual ("A", lvw.Items [4].Text, "#K6");
 881 #endif
 882
 883                         // assign a custom comparer
 884                         MockComparer mc = new MockComparer (false);
 885                         lvw.ListViewItemSorter = mc;
 886
 887                         // when a custom IComparer is assigned, the collection is immediately
 888                         // re-sorted
 889                         Assert.IsTrue (mc.CompareCount > compareCount, "#L1");
 890                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2");
 891                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L3");
 892                         Assert.AreEqual ("C", lvw.Items [0].Text, "#L4");
 893                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#L5");
 894                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#L6");
 895                         Assert.AreEqual ("B", lvw.Items [3].Text, "#L7");
 896                         Assert.AreEqual ("A", lvw.Items [4].Text, "#L8");
 897
 898                         // record compare count
 899                         compareCount = mc.CompareCount;
 900
 901                         // modifying Sorting results in re-sort
 902                         lvw.Sorting = SortOrder.Descending;
 903                         Assert.IsTrue (mc.CompareCount > compareCount, "#M1");
 904                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2");
 905                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M3");
 906                         Assert.AreEqual ("A", lvw.Items [0].Text, "#M4");
 907                         Assert.AreEqual ("B", lvw.Items [1].Text, "#M5");
 908                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#M6");
 909                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#M7");
 910                         Assert.AreEqual ("C", lvw.Items [4].Text, "#M8");
 911
 912                         // record compare count
 913                         compareCount = mc.CompareCount;
 914
 915                         // setting Sorting to the same value does not result in a sort
 916                         // operation
 917                         lvw.Sorting = SortOrder.Descending;
 918                         Assert.AreEqual (compareCount, mc.CompareCount, "#N1");
 919                         Assert.IsNotNull (lvw.ListViewItemSorter, "#N2");
 920                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#N3");
 921                         Assert.AreEqual ("A", lvw.Items [0].Text, "#N4");
 922                         Assert.AreEqual ("B", lvw.Items [1].Text, "#N5");
 923                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#N6");
 924                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#N7");
 925                         Assert.AreEqual ("C", lvw.Items [4].Text, "#N8");
 926
 927                         // modifying Sorting results in re-sort
 928                         lvw.Sorting = SortOrder.Ascending;
 929                         Assert.IsTrue (mc.CompareCount > compareCount, "#O1");
 930                         Assert.IsNotNull (lvw.ListViewItemSorter, "#O2");
 931                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#O3");
 932                         Assert.AreEqual ("C", lvw.Items [0].Text, "#O4");
 933                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#O5");
 934                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#O6");
 935                         Assert.AreEqual ("B", lvw.Items [3].Text, "#O7");
 936                         Assert.AreEqual ("A", lvw.Items [4].Text, "#O8");
 937
 938                         // record compare count
 939                         compareCount = mc.CompareCount;
 940
 941                         // adding an item when Sorting is not None causes re-sort
 942                         lvw.Items.Add ("BC");
 943                         Assert.IsTrue (mc.CompareCount > compareCount, "#P1");
 944                         Assert.IsNotNull (lvw.ListViewItemSorter, "#P2");
 945                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#P3");
 946                         Assert.AreEqual ("C", lvw.Items [0].Text, "#P4");
 947                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#P5");
 948                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#P6");
 949                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#P7");
 950                         Assert.AreEqual ("B", lvw.Items [4].Text, "#P8");
 951                         Assert.AreEqual ("A", lvw.Items [5].Text, "#P9");
 952
 953                         // record compare count
 954                         compareCount = mc.CompareCount;
 955
 956                         // assigning the same custom IComparer again does not result in a
 957                         // re-sort
 958                         lvw.ListViewItemSorter = mc;
 959                         Assert.AreEqual (compareCount, mc.CompareCount, "#Q1");
 960                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
 961                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
 962                         Assert.AreEqual ("C", lvw.Items [0].Text, "#Q4");
 963                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#Q5");
 964                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#Q6");
 965                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#Q7");
 966                         Assert.AreEqual ("B", lvw.Items [4].Text, "#Q8");
 967                         Assert.AreEqual ("A", lvw.Items [5].Text, "#Q9");
 968
 969                         // setting Sorting to None does not perform a sort
 970                         lvw.Sorting = SortOrder.None;
 971                         Assert.AreEqual (compareCount, mc.CompareCount, "#R1");
 972                         Assert.IsNotNull (lvw.ListViewItemSorter, "#R2");
 973                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#R3");
 974                         Assert.AreEqual ("C", lvw.Items [0].Text, "#R4");
 975                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#R5");
 976                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#R6");
 977                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#R7");
 978                         Assert.AreEqual ("B", lvw.Items [4].Text, "#R8");
 979                         Assert.AreEqual ("A", lvw.Items [5].Text, "#R9");
 980
 981                         // assigning the custom IComparer again does not result in a
 982                         // re-sort
 983                         lvw.ListViewItemSorter = mc;
 984                         Assert.AreEqual (compareCount, mc.CompareCount, "#S1");
 985                         Assert.IsNotNull (lvw.ListViewItemSorter, "#S2");
 986                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#S3");
 987                         Assert.AreEqual ("C", lvw.Items [0].Text, "#S4");
 988                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#S5");
 989                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#S6");
 990                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#S7");
 991                         Assert.AreEqual ("B", lvw.Items [4].Text, "#S8");
 992                         Assert.AreEqual ("A", lvw.Items [5].Text, "#S9");
 993
 994                         // set Sorting to Ascending again
 995                         lvw.Sorting = SortOrder.Ascending;
 996                         Assert.IsTrue (mc.CompareCount > compareCount, "#T1");
 997                         Assert.IsNotNull (lvw.ListViewItemSorter, "#T2");
 998                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#T3");
 999                         Assert.AreEqual ("C", lvw.Items [0].Text, "#T4");
1000                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#T5");
1001                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#T6");
1002                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#T7");
1003                         Assert.AreEqual ("B", lvw.Items [4].Text, "#T8");
1004                         Assert.AreEqual ("A", lvw.Items [5].Text, "#T9");
1005
1006                         // record compare count
1007                         compareCount = mc.CompareCount;
1008
1009                         // explicitly calling Sort results in a sort operation
1010                         lvw.Sort ();
1011                         Assert.IsTrue (mc.CompareCount > compareCount, "#U1");
1012                         Assert.IsNotNull (lvw.ListViewItemSorter, "#U2");
1013                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#U3");
1014                         Assert.AreEqual ("C", lvw.Items [0].Text, "#U4");
1015                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#U5");
1016                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#U6");
1017                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#U7");
1018                         Assert.AreEqual ("B", lvw.Items [4].Text, "#U8");
1019                         Assert.AreEqual ("A", lvw.Items [5].Text, "#U9");
1020                         lvw.Sorting = SortOrder.None;
1021
1022                         // record compare count
1023                         compareCount = mc.CompareCount;
1024
1025                         // adding an item when Sorting is None causes re-sort
1026                         lvw.Items.Add ("BD");
1027                         Assert.IsTrue (mc.CompareCount > compareCount, "#V1");
1028                         Assert.IsNotNull (lvw.ListViewItemSorter, "#V2");
1029                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#V3");
1030                         Assert.AreEqual ("A", lvw.Items [0].Text, "#V4");
1031                         Assert.AreEqual ("B", lvw.Items [1].Text, "#V5");
1032                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#V6");
1033                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#V7");
1034                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#V8");
1035                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#V9");
1036                         Assert.AreEqual ("C", lvw.Items [6].Text, "#V10");
1037
1038                         // record compare count
1039                         compareCount = mc.CompareCount;
1040
1041                         // explicitly calling Sort when Sorting is None causes a re-sort
1042                         lvw.Sort ();
1043                         Assert.IsTrue (mc.CompareCount > compareCount, "#W1");
1044                         Assert.IsNotNull (lvw.ListViewItemSorter, "#W2");
1045                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#W3");
1046                         Assert.AreEqual ("A", lvw.Items [0].Text, "#W4");
1047                         Assert.AreEqual ("B", lvw.Items [1].Text, "#W5");
1048                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#W6");
1049                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#W7");
1050                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#W8");
1051                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#W9");
1052                         Assert.AreEqual ("C", lvw.Items [6].Text, "#W10");
1053
1054                         // record compare count
1055                         compareCount = mc.CompareCount;
1056                         form.Dispose ();
1057                 }
1058
1059                 private void AssertSortIcon_NotCreated (View view)
1060                 {
1061                         Form form = new Form ();
1062                         form.ShowInTaskbar = false;
1063                         ListView lvw = CreateListView (view);
1064                         form.Controls.Add (lvw);
1065
1066                         Assert.IsNull (lvw.ListViewItemSorter, "#A1");
1067                         Assert.AreEqual ("B", lvw.Items [0].Text, "#A2");
1068                         Assert.AreEqual ("A", lvw.Items [1].Text, "#A3");
1069                         Assert.AreEqual ("C", lvw.Items [2].Text, "#A4");
1070
1071                         lvw.Sorting = SortOrder.None;
1072                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
1073                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
1074                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
1075                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
1076
1077                         lvw.Sorting = SortOrder.Descending;
1078                         Assert.IsNotNull (lvw.ListViewItemSorter, "#C1");
1079                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
1080                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
1081                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
1082
1083                         lvw.Sorting = SortOrder.Ascending;
1084                         Assert.IsNotNull (lvw.ListViewItemSorter, "#D1");
1085                         Assert.AreEqual ("B", lvw.Items [0].Text, "#D2");
1086                         Assert.AreEqual ("A", lvw.Items [1].Text, "#D3");
1087                         Assert.AreEqual ("C", lvw.Items [2].Text, "#D4");
1088
1089                         // when the handle is not created and a new item is added, the new
1090                         // item is just appended to the collection
1091                         lvw.Items.Add ("BB");
1092                         Assert.IsNotNull (lvw.ListViewItemSorter, "#E1");
1093                         Assert.AreEqual ("B", lvw.Items [0].Text, "#E2");
1094                         Assert.AreEqual ("A", lvw.Items [1].Text, "#E3");
1095                         Assert.AreEqual ("C", lvw.Items [2].Text, "#E4");
1096                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#E5");
1097
1098                         // assign a custom comparer
1099                         MockComparer mc = new MockComparer (false);
1100                         lvw.ListViewItemSorter = mc;
1101
1102                         // assigning a custom IComparer has no effect
1103                         Assert.AreEqual (0, mc.CompareCount, "#F1");
1104                         Assert.IsNotNull (lvw.ListViewItemSorter, "#F2");
1105                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#F3");
1106                         Assert.AreEqual ("B", lvw.Items [0].Text, "#F4");
1107                         Assert.AreEqual ("A", lvw.Items [1].Text, "#F5");
1108                         Assert.AreEqual ("C", lvw.Items [2].Text, "#F6");
1109                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#F7");
1110
1111                         // modifying Sorting does not result in sort operation
1112                         lvw.Sorting = SortOrder.Descending;
1113                         Assert.AreEqual (0, mc.CompareCount, "#G1");
1114                         Assert.IsNotNull (lvw.ListViewItemSorter, "#G2");
1115                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#G3");
1116                         Assert.AreEqual ("B", lvw.Items [0].Text, "#G4");
1117                         Assert.AreEqual ("A", lvw.Items [1].Text, "#G5");
1118                         Assert.AreEqual ("C", lvw.Items [2].Text, "#G6");
1119                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#G7");
1120
1121                         // setting Sorting to the same value does not result in a sort
1122                         // operation
1123                         lvw.Sorting = SortOrder.Descending;
1124                         Assert.AreEqual (0, mc.CompareCount, "#H1");
1125                         Assert.IsNotNull (lvw.ListViewItemSorter, "#H2");
1126                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#H3");
1127                         Assert.AreEqual ("B", lvw.Items [0].Text, "#H4");
1128                         Assert.AreEqual ("A", lvw.Items [1].Text, "#H5");
1129                         Assert.AreEqual ("C", lvw.Items [2].Text, "#H6");
1130                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#H7");
1131
1132                         // setting Sorting to None does not result in a sort operation
1133                         lvw.Sorting = SortOrder.None;
1134                         Assert.AreEqual (0, mc.CompareCount, "#I1");
1135                         Assert.IsNotNull (lvw.ListViewItemSorter, "#I2");
1136                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#I3");
1137                         Assert.AreEqual ("B", lvw.Items [0].Text, "#I4");
1138                         Assert.AreEqual ("A", lvw.Items [1].Text, "#I5");
1139                         Assert.AreEqual ("C", lvw.Items [2].Text, "#I6");
1140                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#I7");
1141
1142                         // explicitly calling Sort when Sorting is None does not result
1143                         // in a sort operation
1144                         lvw.Sort ();
1145                         Assert.AreEqual (0, mc.CompareCount, "#J1");
1146                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J2");
1147                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#J3");
1148                         Assert.AreEqual ("B", lvw.Items [0].Text, "#J4");
1149                         Assert.AreEqual ("A", lvw.Items [1].Text, "#J5");
1150                         Assert.AreEqual ("C", lvw.Items [2].Text, "#J6");
1151                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#J7");
1152
1153                         // setting Sorting again does not result in a sort operation
1154                         lvw.Sorting = SortOrder.Ascending;
1155                         Assert.AreEqual (0, mc.CompareCount, "#K1");
1156                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K2");
1157                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#K3");
1158                         Assert.AreEqual ("B", lvw.Items [0].Text, "#K4");
1159                         Assert.AreEqual ("A", lvw.Items [1].Text, "#K5");
1160                         Assert.AreEqual ("C", lvw.Items [2].Text, "#K6");
1161                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K7");
1162
1163                         // explicitly calling Sort when Sorting is Ascending does not
1164                         // result in a sort operation
1165                         lvw.Sort ();
1166                         Assert.AreEqual (0, mc.CompareCount, "#L1");
1167                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2");
1168                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L3");
1169                         Assert.AreEqual ("B", lvw.Items [0].Text, "#L4");
1170                         Assert.AreEqual ("A", lvw.Items [1].Text, "#L5");
1171                         Assert.AreEqual ("C", lvw.Items [2].Text, "#L6");
1172                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#L7");
1173
1174                         // show the form to create the handle
1175                         form.Show ();
1176
1177                         // when the handle is created, the items are immediately sorted
1178                         Assert.IsTrue (mc.CompareCount > 0, "#L1");
1179                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2");
1180                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M3");
1181                         Assert.AreEqual ("C", lvw.Items [0].Text, "#M4");
1182                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#M5");
1183                         Assert.AreEqual ("B", lvw.Items [2].Text, "#M6");
1184                         Assert.AreEqual ("A", lvw.Items [3].Text, "#M7");
1185
1186                         // setting ListViewItemSorter to null does not result in sort
1187                         // operation
1188                         lvw.ListViewItemSorter = null;
1189                         Assert.IsNull (lvw.ListViewItemSorter, "#N1");
1190                         Assert.AreEqual ("C", lvw.Items [0].Text, "#N2");
1191                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#N3");
1192                         Assert.AreEqual ("B", lvw.Items [2].Text, "#N4");
1193                         Assert.AreEqual ("A", lvw.Items [3].Text, "#N5");
1194
1195                         // explicitly calling sort does not result in sort operation
1196                         lvw.Sort ();
1197                         Assert.IsNull (lvw.ListViewItemSorter, "#O1");
1198                         Assert.AreEqual ("C", lvw.Items [0].Text, "#O2");
1199                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#O3");
1200                         Assert.AreEqual ("B", lvw.Items [2].Text, "#O4");
1201                         Assert.AreEqual ("A", lvw.Items [3].Text, "#O5");
1202
1203                         form.Dispose ();
1204                 }
1205
1206                 private void AssertSortNoIcon_Created (View view)
1207                 {
1208                         int compareCount = 0;
1209
1210                         Form form = new Form ();
1211                         form.ShowInTaskbar = false;
1212                         ListView lvw = CreateListView (view);
1213                         form.Controls.Add (lvw);
1214                         Assert.IsNull (lvw.ListViewItemSorter, "#A");
1215
1216                         form.Show ();
1217
1218                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
1219                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
1220                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
1221                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
1222
1223                         lvw.Sorting = SortOrder.None;
1224                         Assert.IsNull (lvw.ListViewItemSorter, "#C1");
1225                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
1226                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
1227                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
1228
1229                         lvw.Sorting = SortOrder.Ascending;
1230                         Assert.IsNull (lvw.ListViewItemSorter, "#D1");
1231                         Assert.AreEqual ("A", lvw.Items [0].Text, "#D2");
1232                         Assert.AreEqual ("B", lvw.Items [1].Text, "#D3");
1233                         Assert.AreEqual ("C", lvw.Items [2].Text, "#D4");
1234
1235                         lvw.Sorting = SortOrder.Descending;
1236                         Assert.IsNull (lvw.ListViewItemSorter, "#E1");
1237                         Assert.AreEqual ("C", lvw.Items [0].Text, "#E2");
1238                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
1239                         Assert.AreEqual ("A", lvw.Items [2].Text, "#E4");
1240
1241                         lvw.Sorting = SortOrder.None;
1242                         Assert.IsNull (lvw.ListViewItemSorter, "#F1");
1243                         Assert.AreEqual ("C", lvw.Items [0].Text, "#F2");
1244                         Assert.AreEqual ("B", lvw.Items [1].Text, "#F3");
1245                         Assert.AreEqual ("A", lvw.Items [2].Text, "#F4");
1246
1247                         // when Sorting is None and a new item is added, the item is
1248                         // appended to the collection
1249                         lvw.Items.Add ("BB");
1250                         Assert.IsNull (lvw.ListViewItemSorter, "#G1");
1251                         Assert.AreEqual ("C", lvw.Items [0].Text, "#G2");
1252                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
1253                         Assert.AreEqual ("A", lvw.Items [2].Text, "#G4");
1254                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#G5");
1255
1256                         lvw.Sorting = SortOrder.Ascending;
1257                         Assert.IsNull (lvw.ListViewItemSorter, "#H1");
1258                         Assert.AreEqual ("A", lvw.Items [0].Text, "#H2");
1259                         Assert.AreEqual ("B", lvw.Items [1].Text, "#H3");
1260                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#H4");
1261                         Assert.AreEqual ("C", lvw.Items [3].Text, "#H5");
1262
1263                         // when Sorting is not None and a new item is added, the
1264                         // collection is re-sorted automatically
1265                         lvw.Items.Add ("BA");
1266                         Assert.IsNull (lvw.ListViewItemSorter, "#I1");
1267                         Assert.AreEqual ("A", lvw.Items [0].Text, "#I2");
1268                         Assert.AreEqual ("B", lvw.Items [1].Text, "#I3");
1269                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#I4");
1270                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#I5");
1271                         Assert.AreEqual ("C", lvw.Items [4].Text, "#I6");
1272
1273                         // assign a custom comparer
1274                         MockComparer mc = new MockComparer (false);
1275                         lvw.ListViewItemSorter = mc;
1276
1277                         // when a custom IComparer is assigned, the collection is immediately
1278                         // re-sorted
1279                         Assert.IsTrue (mc.CompareCount > compareCount, "#J1");
1280                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J2");
1281                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#J3");
1282                         Assert.AreEqual ("C", lvw.Items [0].Text, "#J4");
1283                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#J5");
1284                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#J6");
1285                         Assert.AreEqual ("B", lvw.Items [3].Text, "#J7");
1286                         Assert.AreEqual ("A", lvw.Items [4].Text, "#J8");
1287
1288                         // record compare count
1289                         compareCount = mc.CompareCount;
1290
1291                         // modifying the sort order results in a sort
1292                         lvw.Sorting = SortOrder.Descending;
1293                         Assert.IsTrue (mc.CompareCount > compareCount, "#L1");
1294                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K2");
1295                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#K3");
1296                         Assert.AreEqual ("A", lvw.Items [0].Text, "#K4");
1297                         Assert.AreEqual ("B", lvw.Items [1].Text, "#K5");
1298                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#K6");
1299                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K7");
1300                         Assert.AreEqual ("C", lvw.Items [4].Text, "#K8");
1301
1302                         // record compare count
1303                         compareCount = mc.CompareCount;
1304
1305                         // set the sort order to the same value does not result in a sort
1306                         // operation
1307                         lvw.Sorting = SortOrder.Descending;
1308                         Assert.AreEqual (compareCount, mc.CompareCount, "#L1");
1309                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2");
1310                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L3");
1311                         Assert.AreEqual ("A", lvw.Items [0].Text, "#L4");
1312                         Assert.AreEqual ("B", lvw.Items [1].Text, "#L5");
1313                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#L6");
1314                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#L7");
1315                         Assert.AreEqual ("C", lvw.Items [4].Text, "#L8");
1316
1317                         // modifying the sort order results in a sort
1318                         lvw.Sorting = SortOrder.Ascending;
1319                         Assert.IsTrue (mc.CompareCount > compareCount, "#M1");
1320                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2");
1321                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M3");
1322                         Assert.AreEqual ("C", lvw.Items [0].Text, "#M4");
1323                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#M5");
1324                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#M6");
1325                         Assert.AreEqual ("B", lvw.Items [3].Text, "#M7");
1326                         Assert.AreEqual ("A", lvw.Items [4].Text, "#M8");
1327
1328                         // record compare count
1329                         compareCount = mc.CompareCount;
1330
1331                         // adding an item when Sorting is not None caused a re-sort
1332                         lvw.Items.Add ("BC");
1333                         Assert.IsTrue (mc.CompareCount > compareCount, "#N1");
1334                         Assert.IsNotNull (lvw.ListViewItemSorter, "#N2");
1335                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#N3");
1336                         Assert.AreEqual ("C", lvw.Items [0].Text, "#N4");
1337                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#N5");
1338                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#N6");
1339                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#N7");
1340                         Assert.AreEqual ("B", lvw.Items [4].Text, "#N8");
1341                         Assert.AreEqual ("A", lvw.Items [5].Text, "#N9");
1342
1343                         // record compare count
1344                         compareCount = mc.CompareCount;
1345
1346                         // assigning the same custom IComparer again does not result in a
1347                         // re-sort
1348                         lvw.ListViewItemSorter = mc;
1349                         Assert.AreEqual (compareCount, mc.CompareCount, "#O1");
1350                         Assert.IsNotNull (lvw.ListViewItemSorter, "#O2");
1351                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#O3");
1352                         Assert.AreEqual ("C", lvw.Items [0].Text, "#O4");
1353                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#O5");
1354                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#O6");
1355                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#O7");
1356                         Assert.AreEqual ("B", lvw.Items [4].Text, "#O8");
1357                         Assert.AreEqual ("A", lvw.Items [5].Text, "#O9");
1358
1359                         // setting sort order to None does not perform a sort and resets
1360                         // the ListViewItemSorter
1361                         lvw.Sorting = SortOrder.None;
1362                         Assert.AreEqual (compareCount, mc.CompareCount, "#P1");
1363 #if NET_2_0
1364                         Assert.IsNull (lvw.ListViewItemSorter, "#P2");
1365 #else
1366                         Assert.IsNotNull (lvw.ListViewItemSorter, "#P2a");
1367                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#P2b");
1368 #endif
1369                         Assert.AreEqual ("C", lvw.Items [0].Text, "#P3");
1370                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#P4");
1371                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#P5");
1372                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#P6");
1373                         Assert.AreEqual ("B", lvw.Items [4].Text, "#P7");
1374                         Assert.AreEqual ("A", lvw.Items [5].Text, "#P8");
1375
1376
1377                         lvw.ListViewItemSorter = mc;
1378 #if NET_2_0
1379                         // assigning the previous custom IComparer again results in a
1380                         // re-sort
1381                         Assert.IsTrue (mc.CompareCount > compareCount, "#Q1");
1382                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1383                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1384                         Assert.AreEqual ("A", lvw.Items [0].Text, "#Q4");
1385                         Assert.AreEqual ("B", lvw.Items [1].Text, "#Q5");
1386                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#Q6");
1387                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#Q7");
1388                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#Q8");
1389                         Assert.AreEqual ("C", lvw.Items [5].Text, "#Q9");
1390 #else
1391                         Assert.AreEqual (compareCount, mc.CompareCount, "#Q1");
1392                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1393                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1394                         Assert.AreEqual ("C", lvw.Items [0].Text, "#Q4");
1395                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#Q5");
1396                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#Q6");
1397                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#Q7");
1398                         Assert.AreEqual ("B", lvw.Items [4].Text, "#Q8");
1399                         Assert.AreEqual ("A", lvw.Items [5].Text, "#Q9");
1400 #endif
1401
1402                         // record compare count
1403                         compareCount = mc.CompareCount;
1404
1405                         // set Sorting to Ascending again to verify that the internal
1406                         // IComparer is not used when we reset Sorting to None
1407                         // (as the items would then be sorted alfabetically)
1408                         lvw.Sorting = SortOrder.Ascending;
1409                         Assert.IsTrue (mc.CompareCount > compareCount, "#R1");
1410                         Assert.IsNotNull (lvw.ListViewItemSorter, "#R2");
1411                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#R3");
1412                         Assert.AreEqual ("C", lvw.Items [0].Text, "#R4");
1413                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#R5");
1414                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#R6");
1415                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#R7");
1416                         Assert.AreEqual ("B", lvw.Items [4].Text, "#R8");
1417                         Assert.AreEqual ("A", lvw.Items [5].Text, "#R9");
1418
1419                         // record compare count
1420                         compareCount = mc.CompareCount;
1421
1422                         lvw.Sorting = SortOrder.None;
1423                         Assert.AreEqual (compareCount, mc.CompareCount, "#S1");
1424 #if NET_2_0
1425                         Assert.IsNull (lvw.ListViewItemSorter, "#S2");
1426 #else
1427                         Assert.IsNotNull (lvw.ListViewItemSorter, "#S2a");
1428                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#S2b");
1429 #endif
1430                         Assert.AreEqual ("C", lvw.Items [0].Text, "#S3");
1431                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#S4");
1432                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#S5");
1433                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#S6");
1434                         Assert.AreEqual ("B", lvw.Items [4].Text, "#S7");
1435                         Assert.AreEqual ("A", lvw.Items [5].Text, "#S8");
1436
1437                         // record compare count
1438                         compareCount = mc.CompareCount;
1439
1440                         lvw.Items.Add ("BD");
1441 #if NET_2_0
1442                         // adding an item when Sorting is None does not cause a re-sort
1443                         Assert.AreEqual (compareCount, mc.CompareCount, "#T1");
1444                         Assert.IsNull (lvw.ListViewItemSorter, "#T2");
1445                         Assert.AreEqual ("C", lvw.Items [0].Text, "#T3");
1446                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#T4");
1447                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#T5");
1448                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#T6");
1449                         Assert.AreEqual ("B", lvw.Items [4].Text, "#T7");
1450                         Assert.AreEqual ("A", lvw.Items [5].Text, "#T8");
1451                         Assert.AreEqual ("BD", lvw.Items [6].Text, "#T9");
1452 #else
1453                         // adding an item when Sorting is None results in a re-sort
1454                         Assert.IsTrue (mc.CompareCount > compareCount, "#T1");
1455                         Assert.IsNotNull (lvw.ListViewItemSorter, "#T2");
1456                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#T3");
1457                         Assert.AreEqual ("A", lvw.Items [0].Text, "#T4");
1458                         Assert.AreEqual ("B", lvw.Items [1].Text, "#T5");
1459                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#T6");
1460                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#T7");
1461                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#T8");
1462                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#T9");
1463                         Assert.AreEqual ("C", lvw.Items [6].Text, "#T10");
1464 #endif
1465
1466                         // record compare count
1467                         compareCount = mc.CompareCount;
1468
1469                         lvw.Sort ();
1470 #if NET_2_0
1471                         // explicitly calling Sort when Sorting is None does nothing
1472                         Assert.AreEqual (compareCount, mc.CompareCount, "#U1");
1473                         Assert.IsNull (lvw.ListViewItemSorter, "#U2");
1474                         Assert.AreEqual ("C", lvw.Items [0].Text, "#U3");
1475                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#U4");
1476                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#U5");
1477                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#U6");
1478                         Assert.AreEqual ("B", lvw.Items [4].Text, "#U7");
1479                         Assert.AreEqual ("A", lvw.Items [5].Text, "#U8");
1480                         Assert.AreEqual ("BD", lvw.Items [6].Text, "#U9");
1481 #else
1482                         // explicitly calling Sort when Sorting is None results in a re-sort
1483                         Assert.IsTrue (mc.CompareCount > compareCount, "#U1");
1484                         Assert.IsNotNull (lvw.ListViewItemSorter, "#U2");
1485                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#U3");
1486                         Assert.AreEqual ("A", lvw.Items [0].Text, "#U4");
1487                         Assert.AreEqual ("B", lvw.Items [1].Text, "#U5");
1488                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#U6");
1489                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#U7");
1490                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#U8");
1491                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#U9");
1492                         Assert.AreEqual ("C", lvw.Items [6].Text, "#U10");
1493 #endif
1494
1495                         // record compare count
1496                         compareCount = mc.CompareCount;
1497
1498                         lvw.Sorting = SortOrder.Ascending;
1499 #if NET_2_0
1500                         // setting Sorting again, does not reinstate the custom IComparer
1501                         // but sorting is actually performed using an internal non-visible
1502                         // comparer
1503                         Assert.AreEqual (compareCount, mc.CompareCount, "#V1");
1504                         Assert.IsNull (lvw.ListViewItemSorter, "#V2");
1505                         Assert.AreEqual ("A", lvw.Items [0].Text, "#V3");
1506                         Assert.AreEqual ("B", lvw.Items [1].Text, "#V4");
1507                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#V5");
1508                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#V6");
1509                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#V7");
1510                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#V8");
1511                         Assert.AreEqual ("C", lvw.Items [6].Text, "#V9");
1512 #else
1513                         // setting Sorting again, uses the custom IComparer to sort the items
1514                         Assert.IsTrue (mc.CompareCount > compareCount, "#V1");
1515                         Assert.IsNotNull (lvw.ListViewItemSorter, "#V2");
1516                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#V3");
1517                         Assert.AreEqual ("C", lvw.Items [0].Text, "#V4");
1518                         Assert.AreEqual ("BD", lvw.Items [1].Text, "#V5");
1519                         Assert.AreEqual ("BC", lvw.Items [2].Text, "#V6");
1520                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#V7");
1521                         Assert.AreEqual ("BA", lvw.Items [4].Text, "#V8");
1522                         Assert.AreEqual ("B", lvw.Items [5].Text, "#V9");
1523                         Assert.AreEqual ("A", lvw.Items [6].Text, "#V10");
1524 #endif
1525
1526                         // record compare count
1527                         compareCount = mc.CompareCount;
1528
1529                         lvw.Sort ();
1530 #if NET_2_0
1531                         // explicitly calling Sort, does not reinstate the custom IComparer
1532                         // but sorting is actually performed using an internal non-visible
1533                         // comparer
1534                         Assert.AreEqual (compareCount, mc.CompareCount, "#W1");
1535                         Assert.IsNull (lvw.ListViewItemSorter, "#W2");
1536                         Assert.AreEqual ("A", lvw.Items [0].Text, "#W3");
1537                         Assert.AreEqual ("B", lvw.Items [1].Text, "#W4");
1538                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#W5");
1539                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#W6");
1540                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#W7");
1541                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#W8");
1542                         Assert.AreEqual ("C", lvw.Items [6].Text, "#W9");
1543 #else
1544                         // setting Sorting again, uses the custom IComparer to sort the items
1545                         Assert.IsTrue (mc.CompareCount > compareCount, "#W1");
1546                         Assert.IsNotNull (lvw.ListViewItemSorter, "#W2");
1547                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#W3");
1548                         Assert.AreEqual ("C", lvw.Items [0].Text, "#W4");
1549                         Assert.AreEqual ("BD", lvw.Items [1].Text, "#W5");
1550                         Assert.AreEqual ("BC", lvw.Items [2].Text, "#W6");
1551                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#W7");
1552                         Assert.AreEqual ("BA", lvw.Items [4].Text, "#W8");
1553                         Assert.AreEqual ("B", lvw.Items [5].Text, "#W9");
1554                         Assert.AreEqual ("A", lvw.Items [6].Text, "#W10");
1555 #endif
1556
1557                         // record compare count
1558                         compareCount = mc.CompareCount;
1559
1560                         form.Dispose ();
1561                 }
1562
1563                 private void AssertSortNoIcon_NotCreated (View view)
1564                 {
1565                         Form form = new Form ();
1566                         form.ShowInTaskbar = false;
1567                         ListView lvw = CreateListView (view);
1568                         form.Controls.Add (lvw);
1569
1570                         Assert.IsNull (lvw.ListViewItemSorter, "#A1");
1571                         Assert.AreEqual ("B", lvw.Items [0].Text, "#A2");
1572                         Assert.AreEqual ("A", lvw.Items [1].Text, "#A3");
1573                         Assert.AreEqual ("C", lvw.Items [2].Text, "#A4");
1574
1575                         lvw.Sorting = SortOrder.None;
1576                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
1577                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
1578                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
1579                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
1580
1581                         lvw.Sorting = SortOrder.Ascending;
1582                         Assert.IsNull (lvw.ListViewItemSorter, "#C1");
1583                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
1584                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
1585                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
1586
1587                         lvw.Sorting = SortOrder.Descending;
1588                         Assert.IsNull (lvw.ListViewItemSorter, "#D1");
1589                         Assert.AreEqual ("B", lvw.Items [0].Text, "#D2");
1590                         Assert.AreEqual ("A", lvw.Items [1].Text, "#D3");
1591                         Assert.AreEqual ("C", lvw.Items [2].Text, "#D4");
1592
1593                         lvw.Sorting = SortOrder.None;
1594                         Assert.IsNull (lvw.ListViewItemSorter, "#E1");
1595                         Assert.AreEqual ("B", lvw.Items [0].Text, "#E2");
1596                         Assert.AreEqual ("A", lvw.Items [1].Text, "#E3");
1597                         Assert.AreEqual ("C", lvw.Items [2].Text, "#E4");
1598
1599                         lvw.Sorting = SortOrder.Ascending;
1600                         Assert.IsNull (lvw.ListViewItemSorter, "#F1");
1601                         Assert.AreEqual ("B", lvw.Items [0].Text, "#F2");
1602                         Assert.AreEqual ("A", lvw.Items [1].Text, "#F3");
1603                         Assert.AreEqual ("C", lvw.Items [2].Text, "#F4");
1604
1605                         // when the handle is not created and a new item is added, the new
1606                         // item is just appended to the collection
1607                         lvw.Items.Add ("BB");
1608                         Assert.IsNull (lvw.ListViewItemSorter, "#G1");
1609                         Assert.AreEqual ("B", lvw.Items [0].Text, "#G2");
1610                         Assert.AreEqual ("A", lvw.Items [1].Text, "#G3");
1611                         Assert.AreEqual ("C", lvw.Items [2].Text, "#G4");
1612                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#G5");
1613
1614                         // assign a custom comparer
1615                         MockComparer mc = new MockComparer (false);
1616                         lvw.ListViewItemSorter = mc;
1617
1618                         // assigning a custom IComparer has no effect
1619                         Assert.AreEqual (0, mc.CompareCount, "#H1");
1620                         Assert.IsNotNull (lvw.ListViewItemSorter, "#H2");
1621                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#H3");
1622                         Assert.AreEqual ("B", lvw.Items [0].Text, "#H4");
1623                         Assert.AreEqual ("A", lvw.Items [1].Text, "#H5");
1624                         Assert.AreEqual ("C", lvw.Items [2].Text, "#H6");
1625                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#H7");
1626
1627                         // modifying Sorting has no effect
1628                         lvw.Sorting = SortOrder.Descending;
1629                         Assert.AreEqual (0, mc.CompareCount, "#I1");
1630                         Assert.IsNotNull (lvw.ListViewItemSorter, "#I2");
1631                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#I3");
1632                         Assert.AreEqual ("B", lvw.Items [0].Text, "#I4");
1633                         Assert.AreEqual ("A", lvw.Items [1].Text, "#I5");
1634                         Assert.AreEqual ("C", lvw.Items [2].Text, "#I6");
1635                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#I7");
1636
1637                         // setting Sorting to the same value does not result in a sort
1638                         // operation
1639                         lvw.Sorting = SortOrder.Descending;
1640                         Assert.AreEqual (0, mc.CompareCount, "#J1");
1641                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J2");
1642                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#J3");
1643                         Assert.AreEqual ("B", lvw.Items [0].Text, "#J4");
1644                         Assert.AreEqual ("A", lvw.Items [1].Text, "#J5");
1645                         Assert.AreEqual ("C", lvw.Items [2].Text, "#J6");
1646                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#J7");
1647
1648                         // setting Sorting to another value does not result in a sort
1649                         // operation
1650                         lvw.Sorting = SortOrder.Ascending;
1651                         Assert.AreEqual (0, mc.CompareCount, "#K1");
1652                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K2");
1653                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#K3");
1654                         Assert.AreEqual ("B", lvw.Items [0].Text, "#K4");
1655                         Assert.AreEqual ("A", lvw.Items [1].Text, "#K5");
1656                         Assert.AreEqual ("C", lvw.Items [2].Text, "#K6");
1657                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K7");
1658
1659                         lvw.Sorting = SortOrder.None;
1660                         Assert.AreEqual (0, mc.CompareCount, "#L1");
1661 #if NET_2_0
1662                         // setting Sorting to None does not perform a sort and resets the
1663                         // ListViewItemSorter
1664                         Assert.IsNull (lvw.ListViewItemSorter, "#L2");
1665 #else
1666                         // setting Sorting to None does not perform a sort
1667                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2a");
1668                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L2b");
1669 #endif
1670                         Assert.AreEqual ("B", lvw.Items [0].Text, "#L3");
1671                         Assert.AreEqual ("A", lvw.Items [1].Text, "#L4");
1672                         Assert.AreEqual ("C", lvw.Items [2].Text, "#L5");
1673                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#L6");
1674
1675                         // explicitly calling Sort when Sorting is None does nothing
1676                         lvw.Sort ();
1677                         Assert.AreEqual (0, mc.CompareCount, "#M1");
1678 #if NET_2_0
1679                         Assert.IsNull (lvw.ListViewItemSorter, "#M2");
1680 #else
1681                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2a");
1682                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M2b");
1683 #endif
1684                         Assert.AreEqual ("B", lvw.Items [0].Text, "#M3");
1685                         Assert.AreEqual ("A", lvw.Items [1].Text, "#M4");
1686                         Assert.AreEqual ("C", lvw.Items [2].Text, "#M5");
1687                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#M6");
1688
1689                         lvw.Sorting = SortOrder.Ascending;
1690                         Assert.AreEqual (0, mc.CompareCount, "#N1");
1691 #if NET_2_0
1692                         Assert.IsNull (lvw.ListViewItemSorter, "#N2");
1693 #else
1694                         Assert.IsNotNull (lvw.ListViewItemSorter, "#N2a");
1695                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#N2b");
1696 #endif
1697                         Assert.AreEqual ("B", lvw.Items [0].Text, "#N3");
1698                         Assert.AreEqual ("A", lvw.Items [1].Text, "#N4");
1699                         Assert.AreEqual ("C", lvw.Items [2].Text, "#N5");
1700                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#N6");
1701
1702                         // explicitly set the custom IComparer again
1703                         lvw.ListViewItemSorter = mc;
1704                         Assert.AreEqual (0, mc.CompareCount, "#O1");
1705                         Assert.IsNotNull (lvw.ListViewItemSorter, "#O2");
1706                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#O3");
1707                         Assert.AreEqual ("B", lvw.Items [0].Text, "#O4");
1708                         Assert.AreEqual ("A", lvw.Items [1].Text, "#O5");
1709                         Assert.AreEqual ("C", lvw.Items [2].Text, "#O6");
1710                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#O7");
1711
1712                         // explicitly calling Sort when handle is not created does not
1713                         // result in sort operation
1714                         Assert.AreEqual (0, mc.CompareCount, "#P1");
1715                         Assert.IsNotNull (lvw.ListViewItemSorter, "#P2");
1716                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#P3");
1717                         Assert.AreEqual ("B", lvw.Items [0].Text, "#P4");
1718                         Assert.AreEqual ("A", lvw.Items [1].Text, "#P5");
1719                         Assert.AreEqual ("C", lvw.Items [2].Text, "#P6");
1720                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#P7");
1721
1722                         // show the form to create the handle
1723                         form.Show ();
1724
1725                         // when the handle is created, the items are immediately sorted
1726                         Assert.IsTrue (mc.CompareCount > 0, "#Q1");
1727                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1728                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1729                         Assert.AreEqual ("C", lvw.Items [0].Text, "#Q4");
1730                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#Q5");
1731                         Assert.AreEqual ("B", lvw.Items [2].Text, "#Q6");
1732                         Assert.AreEqual ("A", lvw.Items [3].Text, "#Q7");
1733
1734                         // setting ListViewItemSorter to null does not result in sort
1735                         // operation
1736                         lvw.ListViewItemSorter = null;
1737                         Assert.IsNull (lvw.ListViewItemSorter, "#R1");
1738                         Assert.AreEqual ("C", lvw.Items [0].Text, "#R2");
1739                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#R3");
1740                         Assert.AreEqual ("B", lvw.Items [2].Text, "#R4");
1741                         Assert.AreEqual ("A", lvw.Items [3].Text, "#R5");
1742
1743                         // explicitly calling sort does not result in sort operation
1744                         lvw.Sort ();
1745                         Assert.IsNull (lvw.ListViewItemSorter, "#S1");
1746                         Assert.AreEqual ("C", lvw.Items [0].Text, "#S2");
1747                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#S3");
1748                         Assert.AreEqual ("B", lvw.Items [2].Text, "#S4");
1749                         Assert.AreEqual ("A", lvw.Items [3].Text, "#S5");
1750
1751                         // modifying Sorting does not result in sort operation
1752                         lvw.Sorting = SortOrder.Ascending;
1753                         Assert.IsNull (lvw.ListViewItemSorter, "#T1");
1754                         Assert.AreEqual ("C", lvw.Items [0].Text, "#T2");
1755                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#T3");
1756                         Assert.AreEqual ("B", lvw.Items [2].Text, "#T4");
1757                         Assert.AreEqual ("A", lvw.Items [3].Text, "#T5");
1758
1759                         form.Dispose ();
1760                 }
1761
1762                 private void AssertSort_Checked (View view)
1763                 {
1764                         Form form = new Form ();
1765                         form.ShowInTaskbar = false;
1766                         ListView lvw = CreateListView (view);
1767                         lvw.CheckBoxes = true;
1768                         form.Controls.Add (lvw);
1769
1770                         form.Show ();
1771
1772                         Assert.AreEqual (0, lvw.CheckedItems.Count, "#A1");
1773                         Assert.AreEqual (0, lvw.CheckedIndices.Count, "#A2");
1774
1775                         // select an item
1776                         lvw.Items [2].Checked = true;
1777                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#B1");
1778                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#B2");
1779                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#B3");
1780                         Assert.AreEqual (2, lvw.CheckedIndices [0], "#B4");
1781
1782                         // sort the items descending
1783                         lvw.Sorting = SortOrder.Descending;
1784                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#C1");
1785                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#C2");
1786                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#C3");
1787                         Assert.AreEqual (0, lvw.CheckedIndices [0], "#C4");
1788
1789                         // add an item, which ends up before the selected item after the
1790                         // sort operation
1791                         ListViewItem item = lvw.Items.Add ("D");
1792                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#D1");
1793                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#D2");
1794                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#D3");
1795                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#D4");
1796
1797                         // remove an item before the selected item
1798                         lvw.Items.Remove (item);
1799                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#E1");
1800                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#E2");
1801                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#E3");
1802                         Assert.AreEqual (0, lvw.CheckedIndices [0], "#E4");
1803
1804                         // insert an item before the selected item
1805                         lvw.Items.Insert (0, "D");
1806                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#F1");
1807                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#F2");
1808                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#F3");
1809                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#F4");
1810
1811                         // assign a custom comparer
1812                         MockComparer mc = new MockComparer (false);
1813                         lvw.ListViewItemSorter = mc;
1814
1815                         // items are re-sorted automatically
1816                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#G1");
1817                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#G2");
1818                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#G3");
1819                         Assert.AreEqual (2, lvw.CheckedIndices [0], "#G4");
1820
1821                         // modify sort order
1822                         lvw.Sorting = SortOrder.Ascending;
1823                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#H1");
1824                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#H2");
1825                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#H3");
1826                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#H4");
1827
1828                         form.Dispose ();
1829                 }
1830
1831                 private void AssertSort_Selected (View view)
1832                 {
1833                         Form form = new Form ();
1834                         form.ShowInTaskbar = false;
1835                         ListView lvw = CreateListView (view);
1836                         form.Controls.Add (lvw);
1837
1838                         form.Show ();
1839
1840                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#A1");
1841                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#A2");
1842
1843                         // select an item
1844                         lvw.Items [2].Selected = true;
1845                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#B1");
1846                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#B2");
1847                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#B3");
1848                         Assert.AreEqual (2, lvw.SelectedIndices [0], "#B4");
1849
1850                         // sort the items descending
1851                         lvw.Sorting = SortOrder.Descending;
1852                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#C1");
1853                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#C2");
1854                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#C3");
1855                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#C4");
1856
1857                         // add an item, which ends up before the selected item after the
1858                         // sort operation
1859                         ListViewItem item = lvw.Items.Add ("D");
1860                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#D1");
1861                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#D2");
1862                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#D3");
1863                         Assert.AreEqual (1, lvw.SelectedIndices [0], "#D4");
1864
1865                         // remove an item before the selected item
1866                         lvw.Items.Remove (item);
1867                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#E1");
1868                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#E2");
1869                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#E3");
1870                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#E4");
1871
1872                         // insert an item before the selected item
1873                         lvw.Items.Insert (0, "D");
1874                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#F1");
1875                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#F2");
1876                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#F3");
1877                         Assert.AreEqual (1, lvw.SelectedIndices [0], "#F4");
1878
1879                         // assign a custom comparer
1880                         MockComparer mc = new MockComparer (false);
1881                         lvw.ListViewItemSorter = mc;
1882
1883                         // items are re-sorted automatically
1884                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#G1");
1885                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#G2");
1886                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#G3");
1887                         Assert.AreEqual (2, lvw.SelectedIndices [0], "#G4");
1888
1889                         // modify sort order
1890                         lvw.Sorting = SortOrder.Ascending;
1891                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#H1");
1892                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#H2");
1893                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#H3");
1894                         Assert.AreEqual (1, lvw.SelectedIndices [0], "#H4");
1895
1896                         form.Dispose ();
1897                 }
1898
1899                 private ListView CreateListView (View view)
1900                 {
1901                         ListView lvw = new ListView ();
1902                         lvw.View = view;
1903                         lvw.Items.Add ("B");
1904                         lvw.Items.Add ("A");
1905                         lvw.Items.Add ("C");
1906                         return lvw;
1907                 }
1908
1909                 private class MockComparer : IComparer
1910                 {
1911                         int _compareCount;
1912                         bool _throwException;
1913
1914                         public MockComparer (bool throwException)
1915                         {
1916                                 _throwException = throwException;
1917                         }
1918
1919                         public int CompareCount {
1920                                 get { return _compareCount; }
1921                         }
1922
1923                         public int Compare (object x, object y)
1924                         {
1925                                 _compareCount++;
1926                                 if (_throwException)
1927                                         throw new InvalidOperationException ();
1928
1929                                 ListViewItem item_x = x as ListViewItem;
1930                                 ListViewItem item_y = y as ListViewItem;
1931                                 SortOrder sortOrder = item_x.ListView.Sorting;
1932
1933                                 // we'll actually perform a reverse-sort
1934                                 if (sortOrder == SortOrder.Ascending)
1935                                         return String.Compare (item_y.Text, item_x.Text);
1936                                 else
1937                                         return String.Compare (item_x.Text, item_y.Text);
1938                         }
1939                 }
1940         }
1941 }