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 #if NET_2_0
 330                 [Test]
 331                 public void TopItem ()
 332                 {
 333                         ListView lvw = CreateListView (View.List);
 334
 335                         lvw.TopItem = null;
 336                         Assert.AreEqual (lvw.Items [0], lvw.TopItem, "#A1");
 337
 338                         lvw.TopItem = new ListViewItem ();
 339                         Assert.AreEqual (lvw.Items [0], lvw.TopItem, "#A2");
 340                 }
 341
 342                 [Test]
 343                 public void TopItem_Exceptions ()
 344                 {
 345                         ListView lvw = CreateListView (View.LargeIcon);
 346                         ListViewItem item = null;
 347
 348                         try {
 349                                 lvw.TopItem = lvw.Items [2];
 350                                 Assert.Fail ("#A1");
 351                         } catch (InvalidOperationException) {
 352                         }
 353
 354                         try {
 355                                 item = lvw.TopItem;
 356                                 Assert.Fail ("#A2");
 357                         } catch (InvalidOperationException) {
 358                         }
 359
 360                         lvw.View = View.SmallIcon;
 361                         try {
 362                                 lvw.TopItem = lvw.Items [2];
 363                                 Assert.Fail ("#A3");
 364                         } catch (InvalidOperationException) {
 365                         }
 366
 367                         try {
 368                                 item = lvw.TopItem;
 369                                 Assert.Fail ("#A4");
 370                         } catch (InvalidOperationException) {
 371                         }
 372
 373                         lvw.View = View.Tile;
 374                         try {
 375                                 lvw.TopItem = lvw.Items [2];
 376                                 Assert.Fail ("#A5");
 377                         } catch (InvalidOperationException) {
 378                         }
 379
 380                         try {
 381                                 item = lvw.TopItem;
 382                                 Assert.Fail ("#A6");
 383                         } catch (InvalidOperationException) {
 384                         }
 385                 }
 386 #endif
 387
 388                 [Test]
 389                 public void Selected ()
 390                 {
 391                         Form form = new Form ();
 392                         form.ShowInTaskbar = false;
 393                         ListView lvw = CreateListView (View.Details);
 394                         form.Controls.Add (lvw);
 395                         lvw.MultiSelect = true;
 396                         lvw.Items [0].Selected = true;
 397                         lvw.Items [2].Selected = true;
 398
 399                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#A1");
 400                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#A2");
 401
 402                         form.Show ();
 403
 404                         Assert.AreEqual (2, lvw.SelectedItems.Count, "#C1");
 405                         Assert.AreEqual ("B", lvw.SelectedItems [0].Text, "#C2");
 406                         Assert.AreEqual ("C", lvw.SelectedItems [1].Text, "#C3");
 407                         Assert.AreEqual (2, lvw.SelectedIndices.Count, "#C4");
 408                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#C5");
 409                         Assert.AreEqual (2, lvw.SelectedIndices [1], "#C6");
 410                         form.Dispose ();
 411                 }
 412
 413 #if NET_2_0
 414                 [Test]
 415                 public void FindItemWithText ()
 416                 {
 417                         ListView lvw = new ListView();
 418                         ListViewItem lvi1 = new ListViewItem (String.Empty);
 419                         ListViewItem lvi2 = new ListViewItem ("angle bracket");
 420                         ListViewItem lvi3 = new ListViewItem ("bracket holder");
 421                         ListViewItem lvi4 = new ListViewItem ("bracket");
 422                         lvw.Items.AddRange (new ListViewItem [] { lvi1, lvi2, lvi3, lvi4 });
 423
 424                         Assert.AreEqual (lvi1, lvw.FindItemWithText (String.Empty), "#A1");
 425                         Assert.AreEqual (lvi3, lvw.FindItemWithText ("bracket"), "#A2");
 426                         Assert.AreEqual (lvi3, lvw.FindItemWithText ("BrackeT"), "#A3");
 427                         Assert.IsNull (lvw.FindItemWithText ("holder"), "#A5");
 428
 429                         Assert.AreEqual (lvw.Items [3], lvw.FindItemWithText ("bracket", true, 3), "#B1");
 430
 431                         Assert.AreEqual (lvw.Items [2], lvw.FindItemWithText ("bracket", true, 0, true), "#C1");
 432                         Assert.AreEqual (lvw.Items [3], lvw.FindItemWithText ("bracket", true, 0, false), "#C2");
 433                         Assert.AreEqual(lvw.Items [3], lvw.FindItemWithText("BrackeT", true, 0, false), "#C3");
 434                         Assert.IsNull (lvw.FindItemWithText ("brack", true, 0, false), "#C4");
 435
 436                         // Sub item search tests
 437                         lvw.Items.Clear ();
 438
 439                         lvi1.Text = "A";
 440                         lvi1.SubItems.Add ("car bracket");
 441                         lvi1.SubItems.Add ("C");
 442
 443                         lvi2.Text = "B";
 444                         lvi2.SubItems.Add ("car");
 445
 446                         lvi3.Text = "C";
 447
 448                         lvw.Items.AddRange (new ListViewItem [] { lvi1, lvi2, lvi3 });
 449
 450                         Assert.AreEqual (lvi1, lvw.FindItemWithText ("car", true, 0), "#D1");
 451                         Assert.AreEqual (lvi3, lvw.FindItemWithText ("C", true, 0), "#D2");
 452                         Assert.AreEqual (lvi2, lvw.FindItemWithText ("car", true, 1), "#D3");
 453                         Assert.IsNull (lvw.FindItemWithText ("car", false, 0), "#D4");
 454
 455                         Assert.AreEqual (lvi1, lvw.FindItemWithText ("car", true, 0, true), "#E1");
 456                         Assert.AreEqual (lvi2, lvw.FindItemWithText ("car", true, 0, false), "#E2");
 457                         Assert.AreEqual (lvi2, lvw.FindItemWithText ("CaR", true, 0, false), "#E3");
 458                 }
 459
 460                 [Test]
 461                 public void FindItemWithText_Exceptions ()
 462                 {
 463                         ListView lvw = new ListView ();
 464
 465                         // Shouldn't throw any exception
 466                         lvw.FindItemWithText (null);
 467
 468                         try {
 469                                 lvw.FindItemWithText (null, false, 0);
 470                                 Assert.Fail ("#A1");
 471                         } catch (ArgumentOutOfRangeException) {
 472                         }
 473
 474                         try {
 475                                 lvw.FindItemWithText (null, false, lvw.Items.Count);
 476                                 Assert.Fail ("#A2");
 477                         } catch (ArgumentOutOfRangeException) {
 478                         }
 479
 480                         // Add a single item
 481                         lvw.Items.Add ("bracket");
 482
 483                         try {
 484                                 lvw.FindItemWithText (null);
 485                                 Assert.Fail ("#A3");
 486                         } catch (ArgumentNullException) {
 487                         }
 488
 489                         try {
 490                                 lvw.FindItemWithText ("bracket", false, -1);
 491                                 Assert.Fail ("#A4");
 492                         } catch (ArgumentOutOfRangeException) {
 493                         }
 494
 495                         try {
 496                                 lvw.FindItemWithText ("bracket", false, lvw.Items.Count);
 497                                 Assert.Fail ("#A5");
 498                         } catch (ArgumentOutOfRangeException) {
 499                         }
 500                 }
 501
 502                 [Test]
 503                 public void HotTracking ()
 504                 {
 505                         ListView lvw = new ListView ();
 506
 507                         lvw.HotTracking = true;
 508                         Assert.AreEqual (true, lvw.HotTracking, "#A1");
 509                         Assert.AreEqual (true, lvw.HoverSelection, "#A2");
 510                         Assert.AreEqual (ItemActivation.OneClick, lvw.Activation, "#A3");
 511
 512                         // HoverSelection and Activation keep the previous value
 513                         lvw.HotTracking = false;
 514                         Assert.AreEqual (false, lvw.HotTracking, "#B1");
 515                         Assert.AreEqual (true, lvw.HoverSelection, "#B2");
 516                         Assert.AreEqual (ItemActivation.OneClick, lvw.Activation, "#B3");
 517
 518                         lvw.HotTracking = true;
 519                         try {
 520                                 lvw.HoverSelection = false;
 521                                 Assert.Fail ("#C1");
 522                         } catch (ArgumentException) {
 523                         }
 524
 525                         try {
 526                                 lvw.Activation = ItemActivation.Standard;
 527                                 Assert.Fail ("#C2");
 528                         } catch (ArgumentException) {
 529                         }
 530                 }
 531
 532                 [Test]
 533                 public void RedrawItems_Exceptions ()
 534                 {
 535                         ListView lvw = new ListView ();
 536                         lvw.Items.Add ("A");
 537                         lvw.Items.Add ("B");
 538
 539                         try {
 540                                 lvw.RedrawItems (-1, 1, true);
 541                                 Assert.Fail ("#A1");
 542                         } catch (ArgumentOutOfRangeException) {
 543                         }
 544
 545                         try {
 546                                 lvw.RedrawItems (0, -1, true);
 547                                 Assert.Fail ("#A2");
 548                         } catch (ArgumentOutOfRangeException) {
 549                         }
 550
 551                         try {
 552                                 lvw.RedrawItems (lvw.Items.Count, 1, true);
 553                                 Assert.Fail ("#A3");
 554                         } catch (ArgumentOutOfRangeException) {
 555                         }
 556
 557                         try {
 558                                 lvw.RedrawItems (0, lvw.Items.Count, true);
 559                                 Assert.Fail ("#A4");
 560                         } catch (ArgumentOutOfRangeException) {
 561                         }
 562
 563                         try {
 564                                 lvw.RedrawItems (1, 0, true);
 565                                 Assert.Fail ("#A5");
 566                         } catch (ArgumentException) {
 567                         }
 568                 }
 569
 570                 const int item_count = 3;
 571                 ListViewItem [] items = new ListViewItem [item_count];
 572
 573                 [Test]
 574                 public void VirtualMode ()
 575                 {
 576                         ListView lvw = new ListView ();
 577                         lvw.VirtualListSize = item_count;
 578                         lvw.RetrieveVirtualItem += ListViewRetrieveVirtualItemHandler;
 579                         lvw.VirtualMode = true;
 580
 581                         CreateListViewItems (item_count);
 582
 583                         Assert.AreEqual (item_count, lvw.Items.Count, "#A1");
 584                         Assert.AreEqual (true, lvw.VirtualMode, "#A2");
 585
 586                         Assert.AreEqual (items [0], lvw.Items [0], "#B1");
 587                         Assert.AreEqual (items [1], lvw.Items [1], "#B2");
 588                         Assert.AreEqual (items [2], lvw.Items [2], "#B3");
 589                         Assert.AreEqual (0, lvw.Items [0].Index, "#B4");
 590                         Assert.AreEqual (1, lvw.Items [1].Index, "#B5");
 591                         Assert.AreEqual (2, lvw.Items [2].Index, "#B6");
 592                         Assert.AreEqual (lvw, lvw.Items [0].ListView, "#B7");
 593                         Assert.AreEqual (lvw, lvw.Items [1].ListView, "#B8");
 594                         Assert.AreEqual (lvw, lvw.Items [2].ListView, "#B9");
 595
 596                         // force to re-create the items, because we need a blank state
 597                         // for our items
 598                         CreateListViewItems (item_count);
 599                         items [0].Name = "A";
 600                         items [1].Name = "B";
 601                         items [2].Name = "C";
 602
 603                         Assert.AreEqual (items [0], lvw.Items ["A"], "#C1");
 604                         Assert.AreEqual (items [1], lvw.Items ["B"], "#C2");
 605                         Assert.AreEqual (items [2], lvw.Items ["C"], "#C3");
 606                         Assert.AreEqual (0, lvw.Items ["A"].Index, "#C4");
 607                         Assert.AreEqual (1, lvw.Items ["B"].Index, "#C5");
 608                         Assert.AreEqual (2, lvw.Items ["C"].Index, "#C6");
 609                         Assert.AreEqual (lvw, lvw.Items ["A"].ListView, "#C7");
 610                         Assert.AreEqual (lvw, lvw.Items ["B"].ListView, "#C8");
 611                         Assert.AreEqual (lvw, lvw.Items ["C"].ListView, "#C9");
 612                         Assert.IsNull (lvw.Items ["Invalid key"], "#C10");
 613                         Assert.IsNull (lvw.Items [String.Empty], "#C11");
 614
 615                         Assert.AreEqual (false, lvw.Items.ContainsKey (String.Empty), "#D1");
 616                         Assert.AreEqual (false, lvw.Items.ContainsKey (null), "#D2");
 617                         Assert.AreEqual (true, lvw.Items.ContainsKey ("A"), "#D3");
 618                         Assert.AreEqual (true, lvw.Items.ContainsKey ("a"), "#D4");
 619                         Assert.AreEqual (true, lvw.Items.ContainsKey ("B"), "#D5");
 620                 }
 621
 622                 void ListViewRetrieveVirtualItemHandler (object o, RetrieveVirtualItemEventArgs args)
 623                 {
 624                         args.Item = items [args.ItemIndex];
 625                 }
 626
 627                 void CreateListViewItems(int count)
 628                 {
 629                         items = new ListViewItem [count];
 630
 631                         for (int i = 0; i < count; i++)
 632                                 items [i] = new ListViewItem (String.Empty);
 633                 }
 634
 635                 [Test]
 636                 public void VirtualMode_Exceptions()
 637                 {
 638                         ListView lvw = new ListView ();
 639
 640                         lvw.Items.Add ("Simple item");
 641                         try {
 642                                 lvw.VirtualMode = true;
 643                                 Assert.Fail ("#A1");
 644                         } catch (InvalidOperationException) {
 645                         }
 646
 647                         lvw.Items.Clear();
 648                         lvw.VirtualMode = true;
 649                         lvw.VirtualListSize = 1;
 650
 651                         lvw.RetrieveVirtualItem += ListViewRetrieveVirtualItemHandler;
 652                         CreateListViewItems (1);
 653
 654                         try {
 655                                 lvw.Sort ();
 656                                 Assert.Fail ("#A3");
 657                         } catch (InvalidOperationException) {
 658                         }
 659                 }
 660
 661                 [Test]
 662                 public void VirtualListSize ()
 663                 {
 664                         ListView lvw = new ListView ();
 665
 666                         lvw.VirtualListSize = item_count;
 667                         Assert.AreEqual (item_count, lvw.VirtualListSize, "#A1");
 668                         Assert.AreEqual (0, lvw.Items.Count, "#A2");
 669
 670                         lvw.VirtualMode = true;
 671                         Assert.AreEqual (item_count, lvw.VirtualListSize, "#B1");
 672                         Assert.AreEqual (item_count, lvw.Items.Count, "#B2");
 673
 674                         lvw.VirtualMode = false;
 675                         Assert.AreEqual (item_count, lvw.VirtualListSize, "#C1");
 676                         Assert.AreEqual (0, lvw.Items.Count, "#C2");
 677                 }
 678
 679                 [Test]
 680                 public void VirtualListSize_Exceptions ()
 681                 {
 682                         ListView lvw = new ListView ();
 683                         try {
 684                                 lvw.VirtualListSize = -1;
 685                                 Assert.Fail ("#A1");
 686                         } catch (ArgumentException) {
 687                         }
 688                 }
 689 #endif
 690
 691                 [Test]
 692                 public void Sort_Details_Checked ()
 693                 {
 694                         AssertSort_Checked (View.Details);
 695                 }
 696
 697                 [Test]
 698                 public void Sort_Details_Created ()
 699                 {
 700                         AssertSortNoIcon_Created (View.Details);
 701                 }
 702
 703                 [Test]
 704                 public void Sort_Details_NotCreated ()
 705                 {
 706                         AssertSortNoIcon_NotCreated (View.Details);
 707                 }
 708
 709                 [Test]
 710                 public void Sort_Details_Selected ()
 711                 {
 712                         AssertSort_Selected (View.Details);
 713                 }
 714
 715                 [Test]
 716                 public void Sort_LargeIcon_Checked ()
 717                 {
 718                         AssertSort_Checked (View.LargeIcon);
 719                 }
 720
 721                 [Test]
 722                 public void Sort_LargeIcon_Created ()
 723                 {
 724                         AssertSortIcon_Created (View.LargeIcon);
 725                 }
 726
 727                 [Test]
 728                 public void Sort_LargeIcon_NotCreated ()
 729                 {
 730                         AssertSortIcon_NotCreated (View.LargeIcon);
 731                 }
 732
 733                 [Test]
 734                 public void Sort_LargeIcon_Selected ()
 735                 {
 736                         AssertSort_Selected (View.LargeIcon);
 737                 }
 738
 739                 [Test]
 740                 public void Sort_List_Checked ()
 741                 {
 742                         AssertSort_Checked (View.List);
 743                 }
 744
 745                 [Test]
 746                 public void Sort_List_Created ()
 747                 {
 748                         AssertSortNoIcon_Created (View.List);
 749                 }
 750
 751                 [Test]
 752                 public void Sort_List_NotCreated ()
 753                 {
 754                         AssertSortNoIcon_NotCreated (View.List);
 755                 }
 756
 757                 [Test]
 758                 public void Sort_List_Selection ()
 759                 {
 760                         AssertSort_Selected (View.List);
 761                 }
 762
 763                 [Test]
 764                 public void Sort_SmallIcon_Checked ()
 765                 {
 766                         AssertSort_Checked (View.SmallIcon);
 767                 }
 768
 769                 [Test]
 770                 public void Sort_SmallIcon_Created ()
 771                 {
 772                         AssertSortIcon_Created (View.SmallIcon);
 773                 }
 774
 775                 [Test]
 776                 public void Sort_SmallIcon_NotCreated ()
 777                 {
 778                         AssertSortIcon_NotCreated (View.SmallIcon);
 779                 }
 780
 781                 [Test]
 782                 public void Sort_SmallIcon_Selection ()
 783                 {
 784                         AssertSort_Selected (View.SmallIcon);
 785                 }
 786
 787 #if NET_2_0
 788                 [Test]
 789                 [ExpectedException (typeof (NotSupportedException))]
 790                 public void Sort_Tile_Checked ()
 791                 {
 792                         AssertSort_Checked (View.Tile);
 793                 }
 794
 795                 [Test]
 796                 public void Sort_Tile_Created ()
 797                 {
 798                         AssertSortNoIcon_Created (View.Tile);
 799                 }
 800
 801                 [Test]
 802                 public void Sort_Tile_NotCreated ()
 803                 {
 804                         AssertSortNoIcon_NotCreated (View.Tile);
 805                 }
 806
 807                 [Test]
 808                 public void Sort_Tile_Selection ()
 809                 {
 810                         AssertSort_Selected (View.Tile);
 811                 }
 812 #endif
 813
 814                 private void AssertSortIcon_Created (View view)
 815                 {
 816                         int compareCount = 0;
 817
 818                         Form form = new Form ();
 819                         form.ShowInTaskbar = false;
 820                         ListView lvw = CreateListView (view);
 821                         form.Controls.Add (lvw);
 822                         Assert.IsNull (lvw.ListViewItemSorter, "#A");
 823
 824                         form.Show ();
 825
 826                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
 827                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
 828                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
 829                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
 830
 831                         lvw.Sorting = SortOrder.None;
 832                         Assert.IsNull (lvw.ListViewItemSorter, "#C1");
 833                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
 834                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
 835                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
 836
 837                         lvw.Sorting = SortOrder.Descending;
 838                         Assert.IsNotNull (lvw.ListViewItemSorter, "#D1");
 839                         Assert.AreEqual ("C", lvw.Items [0].Text, "#D2");
 840                         Assert.AreEqual ("B", lvw.Items [1].Text, "#D3");
 841                         Assert.AreEqual ("A", lvw.Items [2].Text, "#D4");
 842
 843                         lvw.Sorting = SortOrder.Ascending;
 844                         Assert.IsNotNull (lvw.ListViewItemSorter, "#E1");
 845 #if NET_2_0
 846                         Assert.AreEqual ("A", lvw.Items [0].Text, "#E2");
 847                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
 848                         Assert.AreEqual ("C", lvw.Items [2].Text, "#E4");
 849 #else
 850                         // in .NET 1.1, changing Sorting does not have any effect for
 851                         // SmallIcon and LargeIcon view if no custom comparer is used
 852                         Assert.AreEqual ("C", lvw.Items [0].Text, "#E2");
 853                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
 854                         Assert.AreEqual ("A", lvw.Items [2].Text, "#E4");
 855 #endif
 856
 857                         lvw.Sorting = SortOrder.None;
 858                         Assert.IsNotNull (lvw.ListViewItemSorter, "#F1");
 859 #if NET_2_0
 860                         Assert.AreEqual ("A", lvw.Items [0].Text, "#F2");
 861                         Assert.AreEqual ("B", lvw.Items [1].Text, "#F3");
 862                         Assert.AreEqual ("C", lvw.Items [2].Text, "#F4");
 863 #else
 864                         // in .NET 1.1, changing Sorting does not have any effect for
 865                         // SmallIcon and LargeIcon view if no custom comparer is used
 866                         Assert.AreEqual ("C", lvw.Items [0].Text, "#E2");
 867                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
 868                         Assert.AreEqual ("A", lvw.Items [2].Text, "#E4");
 869 #endif
 870
 871                         lvw.Sorting = SortOrder.Ascending;
 872                         Assert.IsNotNull (lvw.ListViewItemSorter, "#G1");
 873 #if NET_2_0
 874                         Assert.AreEqual ("A", lvw.Items [0].Text, "#G2");
 875                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
 876                         Assert.AreEqual ("C", lvw.Items [2].Text, "#G4");
 877 #else
 878                         // in .NET 1.1, changing Sorting does not have any effect for
 879                         // SmallIcon and LargeIcon view if no custom comparer is used
 880                         Assert.AreEqual ("C", lvw.Items [0].Text, "#G2");
 881                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
 882                         Assert.AreEqual ("A", lvw.Items [2].Text, "#G4");
 883 #endif
 884
 885                         lvw.Sorting = SortOrder.Descending;
 886                         Assert.IsNotNull (lvw.ListViewItemSorter, "#G1");
 887                         Assert.AreEqual ("C", lvw.Items [0].Text, "#G2");
 888                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
 889                         Assert.AreEqual ("A", lvw.Items [2].Text, "#G4");
 890
 891                         lvw.Sorting = SortOrder.None;
 892                         Assert.IsNotNull (lvw.ListViewItemSorter, "#H1");
 893                         Assert.AreEqual ("C", lvw.Items [0].Text, "#H2");
 894                         Assert.AreEqual ("B", lvw.Items [1].Text, "#H3");
 895                         Assert.AreEqual ("A", lvw.Items [2].Text, "#H4");
 896
 897                         // when Sorting is None and a new item is added, the collection is
 898                         // sorted using the previous Sorting value
 899                         lvw.Items.Add ("BB");
 900                         Assert.IsNotNull (lvw.ListViewItemSorter, "#I1");
 901                         Assert.AreEqual ("C", lvw.Items [0].Text, "#I2");
 902                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#I3");
 903                         Assert.AreEqual ("B", lvw.Items [2].Text, "#I4");
 904                         Assert.AreEqual ("A", lvw.Items [3].Text, "#I5");
 905
 906                         lvw.Sorting = SortOrder.Ascending;
 907                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J1");
 908 #if NET_2_0
 909                         Assert.AreEqual ("A", lvw.Items [0].Text, "#J2");
 910                         Assert.AreEqual ("B", lvw.Items [1].Text, "#J3");
 911                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#J4");
 912                         Assert.AreEqual ("C", lvw.Items [3].Text, "#J5");
 913 #else
 914                         // in .NET 1.1, changing Sorting does not have any effect for
 915                         // SmallIcon and LargeIcon view if no custom comparer is used
 916                         Assert.AreEqual ("C", lvw.Items [0].Text, "#J2");
 917                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#J3");
 918                         Assert.AreEqual ("B", lvw.Items [2].Text, "#J4");
 919                         Assert.AreEqual ("A", lvw.Items [3].Text, "#J5");
 920 #endif
 921
 922                         // when Sorting is not None and a new item is added, the
 923                         // collection is re-sorted automatically
 924                         lvw.Items.Add ("BA");
 925                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K1");
 926 #if NET_2_0
 927                         Assert.AreEqual ("A", lvw.Items [0].Text, "#K2");
 928                         Assert.AreEqual ("B", lvw.Items [1].Text, "#K3");
 929                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#K4");
 930                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K5");
 931                         Assert.AreEqual ("C", lvw.Items [4].Text, "#K6");
 932 #else
 933                         // in .NET 1.1, changing Sorting does not have any effect for
 934                         // SmallIcon and LargeIcon view if no custom comparer is used
 935                         Assert.AreEqual ("C", lvw.Items [0].Text, "#K2");
 936                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#K3");
 937                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#K4");
 938                         Assert.AreEqual ("B", lvw.Items [3].Text, "#K5");
 939                         Assert.AreEqual ("A", lvw.Items [4].Text, "#K6");
 940 #endif
 941
 942                         // assign a custom comparer
 943                         MockComparer mc = new MockComparer (false);
 944                         lvw.ListViewItemSorter = mc;
 945
 946                         // when a custom IComparer is assigned, the collection is immediately
 947                         // re-sorted
 948                         Assert.IsTrue (mc.CompareCount > compareCount, "#L1");
 949                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2");
 950                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L3");
 951                         Assert.AreEqual ("C", lvw.Items [0].Text, "#L4");
 952                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#L5");
 953                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#L6");
 954                         Assert.AreEqual ("B", lvw.Items [3].Text, "#L7");
 955                         Assert.AreEqual ("A", lvw.Items [4].Text, "#L8");
 956
 957                         // record compare count
 958                         compareCount = mc.CompareCount;
 959
 960                         // modifying Sorting results in re-sort
 961                         lvw.Sorting = SortOrder.Descending;
 962                         Assert.IsTrue (mc.CompareCount > compareCount, "#M1");
 963                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2");
 964                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M3");
 965                         Assert.AreEqual ("A", lvw.Items [0].Text, "#M4");
 966                         Assert.AreEqual ("B", lvw.Items [1].Text, "#M5");
 967                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#M6");
 968                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#M7");
 969                         Assert.AreEqual ("C", lvw.Items [4].Text, "#M8");
 970
 971                         // record compare count
 972                         compareCount = mc.CompareCount;
 973
 974                         // setting Sorting to the same value does not result in a sort
 975                         // operation
 976                         lvw.Sorting = SortOrder.Descending;
 977                         Assert.AreEqual (compareCount, mc.CompareCount, "#N1");
 978                         Assert.IsNotNull (lvw.ListViewItemSorter, "#N2");
 979                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#N3");
 980                         Assert.AreEqual ("A", lvw.Items [0].Text, "#N4");
 981                         Assert.AreEqual ("B", lvw.Items [1].Text, "#N5");
 982                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#N6");
 983                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#N7");
 984                         Assert.AreEqual ("C", lvw.Items [4].Text, "#N8");
 985
 986                         // modifying Sorting results in re-sort
 987                         lvw.Sorting = SortOrder.Ascending;
 988                         Assert.IsTrue (mc.CompareCount > compareCount, "#O1");
 989                         Assert.IsNotNull (lvw.ListViewItemSorter, "#O2");
 990                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#O3");
 991                         Assert.AreEqual ("C", lvw.Items [0].Text, "#O4");
 992                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#O5");
 993                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#O6");
 994                         Assert.AreEqual ("B", lvw.Items [3].Text, "#O7");
 995                         Assert.AreEqual ("A", lvw.Items [4].Text, "#O8");
 996
 997                         // record compare count
 998                         compareCount = mc.CompareCount;
 999
1000                         // adding an item when Sorting is not None causes re-sort
1001                         lvw.Items.Add ("BC");
1002                         Assert.IsTrue (mc.CompareCount > compareCount, "#P1");
1003                         Assert.IsNotNull (lvw.ListViewItemSorter, "#P2");
1004                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#P3");
1005                         Assert.AreEqual ("C", lvw.Items [0].Text, "#P4");
1006                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#P5");
1007                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#P6");
1008                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#P7");
1009                         Assert.AreEqual ("B", lvw.Items [4].Text, "#P8");
1010                         Assert.AreEqual ("A", lvw.Items [5].Text, "#P9");
1011
1012                         // record compare count
1013                         compareCount = mc.CompareCount;
1014
1015                         // assigning the same custom IComparer again does not result in a
1016                         // re-sort
1017                         lvw.ListViewItemSorter = mc;
1018                         Assert.AreEqual (compareCount, mc.CompareCount, "#Q1");
1019                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1020                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1021                         Assert.AreEqual ("C", lvw.Items [0].Text, "#Q4");
1022                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#Q5");
1023                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#Q6");
1024                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#Q7");
1025                         Assert.AreEqual ("B", lvw.Items [4].Text, "#Q8");
1026                         Assert.AreEqual ("A", lvw.Items [5].Text, "#Q9");
1027
1028                         // setting Sorting to None does not perform a sort
1029                         lvw.Sorting = SortOrder.None;
1030                         Assert.AreEqual (compareCount, mc.CompareCount, "#R1");
1031                         Assert.IsNotNull (lvw.ListViewItemSorter, "#R2");
1032                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#R3");
1033                         Assert.AreEqual ("C", lvw.Items [0].Text, "#R4");
1034                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#R5");
1035                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#R6");
1036                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#R7");
1037                         Assert.AreEqual ("B", lvw.Items [4].Text, "#R8");
1038                         Assert.AreEqual ("A", lvw.Items [5].Text, "#R9");
1039
1040                         // assigning the custom IComparer again does not result in a
1041                         // re-sort
1042                         lvw.ListViewItemSorter = mc;
1043                         Assert.AreEqual (compareCount, mc.CompareCount, "#S1");
1044                         Assert.IsNotNull (lvw.ListViewItemSorter, "#S2");
1045                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#S3");
1046                         Assert.AreEqual ("C", lvw.Items [0].Text, "#S4");
1047                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#S5");
1048                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#S6");
1049                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#S7");
1050                         Assert.AreEqual ("B", lvw.Items [4].Text, "#S8");
1051                         Assert.AreEqual ("A", lvw.Items [5].Text, "#S9");
1052
1053                         // set Sorting to Ascending again
1054                         lvw.Sorting = SortOrder.Ascending;
1055                         Assert.IsTrue (mc.CompareCount > compareCount, "#T1");
1056                         Assert.IsNotNull (lvw.ListViewItemSorter, "#T2");
1057                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#T3");
1058                         Assert.AreEqual ("C", lvw.Items [0].Text, "#T4");
1059                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#T5");
1060                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#T6");
1061                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#T7");
1062                         Assert.AreEqual ("B", lvw.Items [4].Text, "#T8");
1063                         Assert.AreEqual ("A", lvw.Items [5].Text, "#T9");
1064
1065                         // record compare count
1066                         compareCount = mc.CompareCount;
1067
1068                         // explicitly calling Sort results in a sort operation
1069                         lvw.Sort ();
1070                         Assert.IsTrue (mc.CompareCount > compareCount, "#U1");
1071                         Assert.IsNotNull (lvw.ListViewItemSorter, "#U2");
1072                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#U3");
1073                         Assert.AreEqual ("C", lvw.Items [0].Text, "#U4");
1074                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#U5");
1075                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#U6");
1076                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#U7");
1077                         Assert.AreEqual ("B", lvw.Items [4].Text, "#U8");
1078                         Assert.AreEqual ("A", lvw.Items [5].Text, "#U9");
1079                         lvw.Sorting = SortOrder.None;
1080
1081                         // record compare count
1082                         compareCount = mc.CompareCount;
1083
1084                         // adding an item when Sorting is None causes re-sort
1085                         lvw.Items.Add ("BD");
1086                         Assert.IsTrue (mc.CompareCount > compareCount, "#V1");
1087                         Assert.IsNotNull (lvw.ListViewItemSorter, "#V2");
1088                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#V3");
1089                         Assert.AreEqual ("A", lvw.Items [0].Text, "#V4");
1090                         Assert.AreEqual ("B", lvw.Items [1].Text, "#V5");
1091                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#V6");
1092                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#V7");
1093                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#V8");
1094                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#V9");
1095                         Assert.AreEqual ("C", lvw.Items [6].Text, "#V10");
1096
1097                         // record compare count
1098                         compareCount = mc.CompareCount;
1099
1100                         // explicitly calling Sort when Sorting is None causes a re-sort
1101                         lvw.Sort ();
1102                         Assert.IsTrue (mc.CompareCount > compareCount, "#W1");
1103                         Assert.IsNotNull (lvw.ListViewItemSorter, "#W2");
1104                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#W3");
1105                         Assert.AreEqual ("A", lvw.Items [0].Text, "#W4");
1106                         Assert.AreEqual ("B", lvw.Items [1].Text, "#W5");
1107                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#W6");
1108                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#W7");
1109                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#W8");
1110                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#W9");
1111                         Assert.AreEqual ("C", lvw.Items [6].Text, "#W10");
1112
1113                         // record compare count
1114                         compareCount = mc.CompareCount;
1115                         form.Dispose ();
1116                 }
1117
1118                 private void AssertSortIcon_NotCreated (View view)
1119                 {
1120                         Form form = new Form ();
1121                         form.ShowInTaskbar = false;
1122                         ListView lvw = CreateListView (view);
1123                         form.Controls.Add (lvw);
1124
1125                         Assert.IsNull (lvw.ListViewItemSorter, "#A1");
1126                         Assert.AreEqual ("B", lvw.Items [0].Text, "#A2");
1127                         Assert.AreEqual ("A", lvw.Items [1].Text, "#A3");
1128                         Assert.AreEqual ("C", lvw.Items [2].Text, "#A4");
1129
1130                         lvw.Sorting = SortOrder.None;
1131                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
1132                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
1133                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
1134                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
1135
1136                         lvw.Sorting = SortOrder.Descending;
1137                         Assert.IsNotNull (lvw.ListViewItemSorter, "#C1");
1138                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
1139                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
1140                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
1141
1142                         lvw.Sorting = SortOrder.Ascending;
1143                         Assert.IsNotNull (lvw.ListViewItemSorter, "#D1");
1144                         Assert.AreEqual ("B", lvw.Items [0].Text, "#D2");
1145                         Assert.AreEqual ("A", lvw.Items [1].Text, "#D3");
1146                         Assert.AreEqual ("C", lvw.Items [2].Text, "#D4");
1147
1148                         // when the handle is not created and a new item is added, the new
1149                         // item is just appended to the collection
1150                         lvw.Items.Add ("BB");
1151                         Assert.IsNotNull (lvw.ListViewItemSorter, "#E1");
1152                         Assert.AreEqual ("B", lvw.Items [0].Text, "#E2");
1153                         Assert.AreEqual ("A", lvw.Items [1].Text, "#E3");
1154                         Assert.AreEqual ("C", lvw.Items [2].Text, "#E4");
1155                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#E5");
1156
1157                         // assign a custom comparer
1158                         MockComparer mc = new MockComparer (false);
1159                         lvw.ListViewItemSorter = mc;
1160
1161                         // assigning a custom IComparer has no effect
1162                         Assert.AreEqual (0, mc.CompareCount, "#F1");
1163                         Assert.IsNotNull (lvw.ListViewItemSorter, "#F2");
1164                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#F3");
1165                         Assert.AreEqual ("B", lvw.Items [0].Text, "#F4");
1166                         Assert.AreEqual ("A", lvw.Items [1].Text, "#F5");
1167                         Assert.AreEqual ("C", lvw.Items [2].Text, "#F6");
1168                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#F7");
1169
1170                         // modifying Sorting does not result in sort operation
1171                         lvw.Sorting = SortOrder.Descending;
1172                         Assert.AreEqual (0, mc.CompareCount, "#G1");
1173                         Assert.IsNotNull (lvw.ListViewItemSorter, "#G2");
1174                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#G3");
1175                         Assert.AreEqual ("B", lvw.Items [0].Text, "#G4");
1176                         Assert.AreEqual ("A", lvw.Items [1].Text, "#G5");
1177                         Assert.AreEqual ("C", lvw.Items [2].Text, "#G6");
1178                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#G7");
1179
1180                         // setting Sorting to the same value does not result in a sort
1181                         // operation
1182                         lvw.Sorting = SortOrder.Descending;
1183                         Assert.AreEqual (0, mc.CompareCount, "#H1");
1184                         Assert.IsNotNull (lvw.ListViewItemSorter, "#H2");
1185                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#H3");
1186                         Assert.AreEqual ("B", lvw.Items [0].Text, "#H4");
1187                         Assert.AreEqual ("A", lvw.Items [1].Text, "#H5");
1188                         Assert.AreEqual ("C", lvw.Items [2].Text, "#H6");
1189                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#H7");
1190
1191                         // setting Sorting to None does not result in a sort operation
1192                         lvw.Sorting = SortOrder.None;
1193                         Assert.AreEqual (0, mc.CompareCount, "#I1");
1194                         Assert.IsNotNull (lvw.ListViewItemSorter, "#I2");
1195                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#I3");
1196                         Assert.AreEqual ("B", lvw.Items [0].Text, "#I4");
1197                         Assert.AreEqual ("A", lvw.Items [1].Text, "#I5");
1198                         Assert.AreEqual ("C", lvw.Items [2].Text, "#I6");
1199                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#I7");
1200
1201                         // explicitly calling Sort when Sorting is None does not result
1202                         // in a sort operation
1203                         lvw.Sort ();
1204                         Assert.AreEqual (0, mc.CompareCount, "#J1");
1205                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J2");
1206                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#J3");
1207                         Assert.AreEqual ("B", lvw.Items [0].Text, "#J4");
1208                         Assert.AreEqual ("A", lvw.Items [1].Text, "#J5");
1209                         Assert.AreEqual ("C", lvw.Items [2].Text, "#J6");
1210                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#J7");
1211
1212                         // setting Sorting again does not result in a sort operation
1213                         lvw.Sorting = SortOrder.Ascending;
1214                         Assert.AreEqual (0, mc.CompareCount, "#K1");
1215                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K2");
1216                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#K3");
1217                         Assert.AreEqual ("B", lvw.Items [0].Text, "#K4");
1218                         Assert.AreEqual ("A", lvw.Items [1].Text, "#K5");
1219                         Assert.AreEqual ("C", lvw.Items [2].Text, "#K6");
1220                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K7");
1221
1222                         // explicitly calling Sort when Sorting is Ascending does not
1223                         // result in a sort operation
1224                         lvw.Sort ();
1225                         Assert.AreEqual (0, mc.CompareCount, "#L1");
1226                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2");
1227                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L3");
1228                         Assert.AreEqual ("B", lvw.Items [0].Text, "#L4");
1229                         Assert.AreEqual ("A", lvw.Items [1].Text, "#L5");
1230                         Assert.AreEqual ("C", lvw.Items [2].Text, "#L6");
1231                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#L7");
1232
1233                         // show the form to create the handle
1234                         form.Show ();
1235
1236                         // when the handle is created, the items are immediately sorted
1237                         Assert.IsTrue (mc.CompareCount > 0, "#L1");
1238                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2");
1239                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M3");
1240                         Assert.AreEqual ("C", lvw.Items [0].Text, "#M4");
1241                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#M5");
1242                         Assert.AreEqual ("B", lvw.Items [2].Text, "#M6");
1243                         Assert.AreEqual ("A", lvw.Items [3].Text, "#M7");
1244
1245                         // setting ListViewItemSorter to null does not result in sort
1246                         // operation
1247                         lvw.ListViewItemSorter = null;
1248                         Assert.IsNull (lvw.ListViewItemSorter, "#N1");
1249                         Assert.AreEqual ("C", lvw.Items [0].Text, "#N2");
1250                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#N3");
1251                         Assert.AreEqual ("B", lvw.Items [2].Text, "#N4");
1252                         Assert.AreEqual ("A", lvw.Items [3].Text, "#N5");
1253
1254                         // explicitly calling sort does not result in sort operation
1255                         lvw.Sort ();
1256                         Assert.IsNull (lvw.ListViewItemSorter, "#O1");
1257                         Assert.AreEqual ("C", lvw.Items [0].Text, "#O2");
1258                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#O3");
1259                         Assert.AreEqual ("B", lvw.Items [2].Text, "#O4");
1260                         Assert.AreEqual ("A", lvw.Items [3].Text, "#O5");
1261
1262                         form.Dispose ();
1263                 }
1264
1265                 private void AssertSortNoIcon_Created (View view)
1266                 {
1267                         int compareCount = 0;
1268
1269                         Form form = new Form ();
1270                         form.ShowInTaskbar = false;
1271                         ListView lvw = CreateListView (view);
1272                         form.Controls.Add (lvw);
1273                         Assert.IsNull (lvw.ListViewItemSorter, "#A");
1274
1275                         form.Show ();
1276
1277                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
1278                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
1279                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
1280                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
1281
1282                         lvw.Sorting = SortOrder.None;
1283                         Assert.IsNull (lvw.ListViewItemSorter, "#C1");
1284                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
1285                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
1286                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
1287
1288                         lvw.Sorting = SortOrder.Ascending;
1289                         Assert.IsNull (lvw.ListViewItemSorter, "#D1");
1290                         Assert.AreEqual ("A", lvw.Items [0].Text, "#D2");
1291                         Assert.AreEqual ("B", lvw.Items [1].Text, "#D3");
1292                         Assert.AreEqual ("C", lvw.Items [2].Text, "#D4");
1293
1294                         lvw.Sorting = SortOrder.Descending;
1295                         Assert.IsNull (lvw.ListViewItemSorter, "#E1");
1296                         Assert.AreEqual ("C", lvw.Items [0].Text, "#E2");
1297                         Assert.AreEqual ("B", lvw.Items [1].Text, "#E3");
1298                         Assert.AreEqual ("A", lvw.Items [2].Text, "#E4");
1299
1300                         lvw.Sorting = SortOrder.None;
1301                         Assert.IsNull (lvw.ListViewItemSorter, "#F1");
1302                         Assert.AreEqual ("C", lvw.Items [0].Text, "#F2");
1303                         Assert.AreEqual ("B", lvw.Items [1].Text, "#F3");
1304                         Assert.AreEqual ("A", lvw.Items [2].Text, "#F4");
1305
1306                         // when Sorting is None and a new item is added, the item is
1307                         // appended to the collection
1308                         lvw.Items.Add ("BB");
1309                         Assert.IsNull (lvw.ListViewItemSorter, "#G1");
1310                         Assert.AreEqual ("C", lvw.Items [0].Text, "#G2");
1311                         Assert.AreEqual ("B", lvw.Items [1].Text, "#G3");
1312                         Assert.AreEqual ("A", lvw.Items [2].Text, "#G4");
1313                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#G5");
1314
1315                         lvw.Sorting = SortOrder.Ascending;
1316                         Assert.IsNull (lvw.ListViewItemSorter, "#H1");
1317                         Assert.AreEqual ("A", lvw.Items [0].Text, "#H2");
1318                         Assert.AreEqual ("B", lvw.Items [1].Text, "#H3");
1319                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#H4");
1320                         Assert.AreEqual ("C", lvw.Items [3].Text, "#H5");
1321
1322                         // when Sorting is not None and a new item is added, the
1323                         // collection is re-sorted automatically
1324                         lvw.Items.Add ("BA");
1325                         Assert.IsNull (lvw.ListViewItemSorter, "#I1");
1326                         Assert.AreEqual ("A", lvw.Items [0].Text, "#I2");
1327                         Assert.AreEqual ("B", lvw.Items [1].Text, "#I3");
1328                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#I4");
1329                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#I5");
1330                         Assert.AreEqual ("C", lvw.Items [4].Text, "#I6");
1331
1332                         // assign a custom comparer
1333                         MockComparer mc = new MockComparer (false);
1334                         lvw.ListViewItemSorter = mc;
1335
1336                         // when a custom IComparer is assigned, the collection is immediately
1337                         // re-sorted
1338                         Assert.IsTrue (mc.CompareCount > compareCount, "#J1");
1339                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J2");
1340                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#J3");
1341                         Assert.AreEqual ("C", lvw.Items [0].Text, "#J4");
1342                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#J5");
1343                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#J6");
1344                         Assert.AreEqual ("B", lvw.Items [3].Text, "#J7");
1345                         Assert.AreEqual ("A", lvw.Items [4].Text, "#J8");
1346
1347                         // record compare count
1348                         compareCount = mc.CompareCount;
1349
1350                         // modifying the sort order results in a sort
1351                         lvw.Sorting = SortOrder.Descending;
1352                         Assert.IsTrue (mc.CompareCount > compareCount, "#L1");
1353                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K2");
1354                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#K3");
1355                         Assert.AreEqual ("A", lvw.Items [0].Text, "#K4");
1356                         Assert.AreEqual ("B", lvw.Items [1].Text, "#K5");
1357                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#K6");
1358                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K7");
1359                         Assert.AreEqual ("C", lvw.Items [4].Text, "#K8");
1360
1361                         // record compare count
1362                         compareCount = mc.CompareCount;
1363
1364                         // set the sort order to the same value does not result in a sort
1365                         // operation
1366                         lvw.Sorting = SortOrder.Descending;
1367                         Assert.AreEqual (compareCount, mc.CompareCount, "#L1");
1368                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2");
1369                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L3");
1370                         Assert.AreEqual ("A", lvw.Items [0].Text, "#L4");
1371                         Assert.AreEqual ("B", lvw.Items [1].Text, "#L5");
1372                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#L6");
1373                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#L7");
1374                         Assert.AreEqual ("C", lvw.Items [4].Text, "#L8");
1375
1376                         // modifying the sort order results in a sort
1377                         lvw.Sorting = SortOrder.Ascending;
1378                         Assert.IsTrue (mc.CompareCount > compareCount, "#M1");
1379                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2");
1380                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M3");
1381                         Assert.AreEqual ("C", lvw.Items [0].Text, "#M4");
1382                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#M5");
1383                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#M6");
1384                         Assert.AreEqual ("B", lvw.Items [3].Text, "#M7");
1385                         Assert.AreEqual ("A", lvw.Items [4].Text, "#M8");
1386
1387                         // record compare count
1388                         compareCount = mc.CompareCount;
1389
1390                         // adding an item when Sorting is not None caused a re-sort
1391                         lvw.Items.Add ("BC");
1392                         Assert.IsTrue (mc.CompareCount > compareCount, "#N1");
1393                         Assert.IsNotNull (lvw.ListViewItemSorter, "#N2");
1394                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#N3");
1395                         Assert.AreEqual ("C", lvw.Items [0].Text, "#N4");
1396                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#N5");
1397                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#N6");
1398                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#N7");
1399                         Assert.AreEqual ("B", lvw.Items [4].Text, "#N8");
1400                         Assert.AreEqual ("A", lvw.Items [5].Text, "#N9");
1401
1402                         // record compare count
1403                         compareCount = mc.CompareCount;
1404
1405                         // assigning the same custom IComparer again does not result in a
1406                         // re-sort
1407                         lvw.ListViewItemSorter = mc;
1408                         Assert.AreEqual (compareCount, mc.CompareCount, "#O1");
1409                         Assert.IsNotNull (lvw.ListViewItemSorter, "#O2");
1410                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#O3");
1411                         Assert.AreEqual ("C", lvw.Items [0].Text, "#O4");
1412                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#O5");
1413                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#O6");
1414                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#O7");
1415                         Assert.AreEqual ("B", lvw.Items [4].Text, "#O8");
1416                         Assert.AreEqual ("A", lvw.Items [5].Text, "#O9");
1417
1418                         // setting sort order to None does not perform a sort and resets
1419                         // the ListViewItemSorter
1420                         lvw.Sorting = SortOrder.None;
1421                         Assert.AreEqual (compareCount, mc.CompareCount, "#P1");
1422 #if NET_2_0
1423                         Assert.IsNull (lvw.ListViewItemSorter, "#P2");
1424 #else
1425                         Assert.IsNotNull (lvw.ListViewItemSorter, "#P2a");
1426                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#P2b");
1427 #endif
1428                         Assert.AreEqual ("C", lvw.Items [0].Text, "#P3");
1429                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#P4");
1430                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#P5");
1431                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#P6");
1432                         Assert.AreEqual ("B", lvw.Items [4].Text, "#P7");
1433                         Assert.AreEqual ("A", lvw.Items [5].Text, "#P8");
1434
1435
1436                         lvw.ListViewItemSorter = mc;
1437 #if NET_2_0
1438                         // assigning the previous custom IComparer again results in a
1439                         // re-sort
1440                         Assert.IsTrue (mc.CompareCount > compareCount, "#Q1");
1441                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1442                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1443                         Assert.AreEqual ("A", lvw.Items [0].Text, "#Q4");
1444                         Assert.AreEqual ("B", lvw.Items [1].Text, "#Q5");
1445                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#Q6");
1446                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#Q7");
1447                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#Q8");
1448                         Assert.AreEqual ("C", lvw.Items [5].Text, "#Q9");
1449 #else
1450                         Assert.AreEqual (compareCount, mc.CompareCount, "#Q1");
1451                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1452                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1453                         Assert.AreEqual ("C", lvw.Items [0].Text, "#Q4");
1454                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#Q5");
1455                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#Q6");
1456                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#Q7");
1457                         Assert.AreEqual ("B", lvw.Items [4].Text, "#Q8");
1458                         Assert.AreEqual ("A", lvw.Items [5].Text, "#Q9");
1459 #endif
1460
1461                         // record compare count
1462                         compareCount = mc.CompareCount;
1463
1464                         // set Sorting to Ascending again to verify that the internal
1465                         // IComparer is not used when we reset Sorting to None
1466                         // (as the items would then be sorted alfabetically)
1467                         lvw.Sorting = SortOrder.Ascending;
1468                         Assert.IsTrue (mc.CompareCount > compareCount, "#R1");
1469                         Assert.IsNotNull (lvw.ListViewItemSorter, "#R2");
1470                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#R3");
1471                         Assert.AreEqual ("C", lvw.Items [0].Text, "#R4");
1472                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#R5");
1473                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#R6");
1474                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#R7");
1475                         Assert.AreEqual ("B", lvw.Items [4].Text, "#R8");
1476                         Assert.AreEqual ("A", lvw.Items [5].Text, "#R9");
1477
1478                         // record compare count
1479                         compareCount = mc.CompareCount;
1480
1481                         lvw.Sorting = SortOrder.None;
1482                         Assert.AreEqual (compareCount, mc.CompareCount, "#S1");
1483 #if NET_2_0
1484                         Assert.IsNull (lvw.ListViewItemSorter, "#S2");
1485 #else
1486                         Assert.IsNotNull (lvw.ListViewItemSorter, "#S2a");
1487                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#S2b");
1488 #endif
1489                         Assert.AreEqual ("C", lvw.Items [0].Text, "#S3");
1490                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#S4");
1491                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#S5");
1492                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#S6");
1493                         Assert.AreEqual ("B", lvw.Items [4].Text, "#S7");
1494                         Assert.AreEqual ("A", lvw.Items [5].Text, "#S8");
1495
1496                         // record compare count
1497                         compareCount = mc.CompareCount;
1498
1499                         lvw.Items.Add ("BD");
1500 #if NET_2_0
1501                         // adding an item when Sorting is None does not cause a re-sort
1502                         Assert.AreEqual (compareCount, mc.CompareCount, "#T1");
1503                         Assert.IsNull (lvw.ListViewItemSorter, "#T2");
1504                         Assert.AreEqual ("C", lvw.Items [0].Text, "#T3");
1505                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#T4");
1506                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#T5");
1507                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#T6");
1508                         Assert.AreEqual ("B", lvw.Items [4].Text, "#T7");
1509                         Assert.AreEqual ("A", lvw.Items [5].Text, "#T8");
1510                         Assert.AreEqual ("BD", lvw.Items [6].Text, "#T9");
1511 #else
1512                         // adding an item when Sorting is None results in a re-sort
1513                         Assert.IsTrue (mc.CompareCount > compareCount, "#T1");
1514                         Assert.IsNotNull (lvw.ListViewItemSorter, "#T2");
1515                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#T3");
1516                         Assert.AreEqual ("A", lvw.Items [0].Text, "#T4");
1517                         Assert.AreEqual ("B", lvw.Items [1].Text, "#T5");
1518                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#T6");
1519                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#T7");
1520                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#T8");
1521                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#T9");
1522                         Assert.AreEqual ("C", lvw.Items [6].Text, "#T10");
1523 #endif
1524
1525                         // record compare count
1526                         compareCount = mc.CompareCount;
1527
1528                         lvw.Sort ();
1529 #if NET_2_0
1530                         // explicitly calling Sort when Sorting is None does nothing
1531                         Assert.AreEqual (compareCount, mc.CompareCount, "#U1");
1532                         Assert.IsNull (lvw.ListViewItemSorter, "#U2");
1533                         Assert.AreEqual ("C", lvw.Items [0].Text, "#U3");
1534                         Assert.AreEqual ("BC", lvw.Items [1].Text, "#U4");
1535                         Assert.AreEqual ("BB", lvw.Items [2].Text, "#U5");
1536                         Assert.AreEqual ("BA", lvw.Items [3].Text, "#U6");
1537                         Assert.AreEqual ("B", lvw.Items [4].Text, "#U7");
1538                         Assert.AreEqual ("A", lvw.Items [5].Text, "#U8");
1539                         Assert.AreEqual ("BD", lvw.Items [6].Text, "#U9");
1540 #else
1541                         // explicitly calling Sort when Sorting is None results in a re-sort
1542                         Assert.IsTrue (mc.CompareCount > compareCount, "#U1");
1543                         Assert.IsNotNull (lvw.ListViewItemSorter, "#U2");
1544                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#U3");
1545                         Assert.AreEqual ("A", lvw.Items [0].Text, "#U4");
1546                         Assert.AreEqual ("B", lvw.Items [1].Text, "#U5");
1547                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#U6");
1548                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#U7");
1549                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#U8");
1550                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#U9");
1551                         Assert.AreEqual ("C", lvw.Items [6].Text, "#U10");
1552 #endif
1553
1554                         // record compare count
1555                         compareCount = mc.CompareCount;
1556
1557                         lvw.Sorting = SortOrder.Ascending;
1558 #if NET_2_0
1559                         // setting Sorting again, does not reinstate the custom IComparer
1560                         // but sorting is actually performed using an internal non-visible
1561                         // comparer
1562                         Assert.AreEqual (compareCount, mc.CompareCount, "#V1");
1563                         Assert.IsNull (lvw.ListViewItemSorter, "#V2");
1564                         Assert.AreEqual ("A", lvw.Items [0].Text, "#V3");
1565                         Assert.AreEqual ("B", lvw.Items [1].Text, "#V4");
1566                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#V5");
1567                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#V6");
1568                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#V7");
1569                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#V8");
1570                         Assert.AreEqual ("C", lvw.Items [6].Text, "#V9");
1571 #else
1572                         // setting Sorting again, uses the custom IComparer to sort the items
1573                         Assert.IsTrue (mc.CompareCount > compareCount, "#V1");
1574                         Assert.IsNotNull (lvw.ListViewItemSorter, "#V2");
1575                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#V3");
1576                         Assert.AreEqual ("C", lvw.Items [0].Text, "#V4");
1577                         Assert.AreEqual ("BD", lvw.Items [1].Text, "#V5");
1578                         Assert.AreEqual ("BC", lvw.Items [2].Text, "#V6");
1579                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#V7");
1580                         Assert.AreEqual ("BA", lvw.Items [4].Text, "#V8");
1581                         Assert.AreEqual ("B", lvw.Items [5].Text, "#V9");
1582                         Assert.AreEqual ("A", lvw.Items [6].Text, "#V10");
1583 #endif
1584
1585                         // record compare count
1586                         compareCount = mc.CompareCount;
1587
1588                         lvw.Sort ();
1589 #if NET_2_0
1590                         // explicitly calling Sort, does not reinstate the custom IComparer
1591                         // but sorting is actually performed using an internal non-visible
1592                         // comparer
1593                         Assert.AreEqual (compareCount, mc.CompareCount, "#W1");
1594                         Assert.IsNull (lvw.ListViewItemSorter, "#W2");
1595                         Assert.AreEqual ("A", lvw.Items [0].Text, "#W3");
1596                         Assert.AreEqual ("B", lvw.Items [1].Text, "#W4");
1597                         Assert.AreEqual ("BA", lvw.Items [2].Text, "#W5");
1598                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#W6");
1599                         Assert.AreEqual ("BC", lvw.Items [4].Text, "#W7");
1600                         Assert.AreEqual ("BD", lvw.Items [5].Text, "#W8");
1601                         Assert.AreEqual ("C", lvw.Items [6].Text, "#W9");
1602 #else
1603                         // setting Sorting again, uses the custom IComparer to sort the items
1604                         Assert.IsTrue (mc.CompareCount > compareCount, "#W1");
1605                         Assert.IsNotNull (lvw.ListViewItemSorter, "#W2");
1606                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#W3");
1607                         Assert.AreEqual ("C", lvw.Items [0].Text, "#W4");
1608                         Assert.AreEqual ("BD", lvw.Items [1].Text, "#W5");
1609                         Assert.AreEqual ("BC", lvw.Items [2].Text, "#W6");
1610                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#W7");
1611                         Assert.AreEqual ("BA", lvw.Items [4].Text, "#W8");
1612                         Assert.AreEqual ("B", lvw.Items [5].Text, "#W9");
1613                         Assert.AreEqual ("A", lvw.Items [6].Text, "#W10");
1614 #endif
1615
1616                         // record compare count
1617                         compareCount = mc.CompareCount;
1618
1619                         form.Dispose ();
1620                 }
1621
1622                 private void AssertSortNoIcon_NotCreated (View view)
1623                 {
1624                         Form form = new Form ();
1625                         form.ShowInTaskbar = false;
1626                         ListView lvw = CreateListView (view);
1627                         form.Controls.Add (lvw);
1628
1629                         Assert.IsNull (lvw.ListViewItemSorter, "#A1");
1630                         Assert.AreEqual ("B", lvw.Items [0].Text, "#A2");
1631                         Assert.AreEqual ("A", lvw.Items [1].Text, "#A3");
1632                         Assert.AreEqual ("C", lvw.Items [2].Text, "#A4");
1633
1634                         lvw.Sorting = SortOrder.None;
1635                         Assert.IsNull (lvw.ListViewItemSorter, "#B1");
1636                         Assert.AreEqual ("B", lvw.Items [0].Text, "#B2");
1637                         Assert.AreEqual ("A", lvw.Items [1].Text, "#B3");
1638                         Assert.AreEqual ("C", lvw.Items [2].Text, "#B4");
1639
1640                         lvw.Sorting = SortOrder.Ascending;
1641                         Assert.IsNull (lvw.ListViewItemSorter, "#C1");
1642                         Assert.AreEqual ("B", lvw.Items [0].Text, "#C2");
1643                         Assert.AreEqual ("A", lvw.Items [1].Text, "#C3");
1644                         Assert.AreEqual ("C", lvw.Items [2].Text, "#C4");
1645
1646                         lvw.Sorting = SortOrder.Descending;
1647                         Assert.IsNull (lvw.ListViewItemSorter, "#D1");
1648                         Assert.AreEqual ("B", lvw.Items [0].Text, "#D2");
1649                         Assert.AreEqual ("A", lvw.Items [1].Text, "#D3");
1650                         Assert.AreEqual ("C", lvw.Items [2].Text, "#D4");
1651
1652                         lvw.Sorting = SortOrder.None;
1653                         Assert.IsNull (lvw.ListViewItemSorter, "#E1");
1654                         Assert.AreEqual ("B", lvw.Items [0].Text, "#E2");
1655                         Assert.AreEqual ("A", lvw.Items [1].Text, "#E3");
1656                         Assert.AreEqual ("C", lvw.Items [2].Text, "#E4");
1657
1658                         lvw.Sorting = SortOrder.Ascending;
1659                         Assert.IsNull (lvw.ListViewItemSorter, "#F1");
1660                         Assert.AreEqual ("B", lvw.Items [0].Text, "#F2");
1661                         Assert.AreEqual ("A", lvw.Items [1].Text, "#F3");
1662                         Assert.AreEqual ("C", lvw.Items [2].Text, "#F4");
1663
1664                         // when the handle is not created and a new item is added, the new
1665                         // item is just appended to the collection
1666                         lvw.Items.Add ("BB");
1667                         Assert.IsNull (lvw.ListViewItemSorter, "#G1");
1668                         Assert.AreEqual ("B", lvw.Items [0].Text, "#G2");
1669                         Assert.AreEqual ("A", lvw.Items [1].Text, "#G3");
1670                         Assert.AreEqual ("C", lvw.Items [2].Text, "#G4");
1671                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#G5");
1672
1673                         // assign a custom comparer
1674                         MockComparer mc = new MockComparer (false);
1675                         lvw.ListViewItemSorter = mc;
1676
1677                         // assigning a custom IComparer has no effect
1678                         Assert.AreEqual (0, mc.CompareCount, "#H1");
1679                         Assert.IsNotNull (lvw.ListViewItemSorter, "#H2");
1680                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#H3");
1681                         Assert.AreEqual ("B", lvw.Items [0].Text, "#H4");
1682                         Assert.AreEqual ("A", lvw.Items [1].Text, "#H5");
1683                         Assert.AreEqual ("C", lvw.Items [2].Text, "#H6");
1684                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#H7");
1685
1686                         // modifying Sorting has no effect
1687                         lvw.Sorting = SortOrder.Descending;
1688                         Assert.AreEqual (0, mc.CompareCount, "#I1");
1689                         Assert.IsNotNull (lvw.ListViewItemSorter, "#I2");
1690                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#I3");
1691                         Assert.AreEqual ("B", lvw.Items [0].Text, "#I4");
1692                         Assert.AreEqual ("A", lvw.Items [1].Text, "#I5");
1693                         Assert.AreEqual ("C", lvw.Items [2].Text, "#I6");
1694                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#I7");
1695
1696                         // setting Sorting to the same value does not result in a sort
1697                         // operation
1698                         lvw.Sorting = SortOrder.Descending;
1699                         Assert.AreEqual (0, mc.CompareCount, "#J1");
1700                         Assert.IsNotNull (lvw.ListViewItemSorter, "#J2");
1701                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#J3");
1702                         Assert.AreEqual ("B", lvw.Items [0].Text, "#J4");
1703                         Assert.AreEqual ("A", lvw.Items [1].Text, "#J5");
1704                         Assert.AreEqual ("C", lvw.Items [2].Text, "#J6");
1705                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#J7");
1706
1707                         // setting Sorting to another value does not result in a sort
1708                         // operation
1709                         lvw.Sorting = SortOrder.Ascending;
1710                         Assert.AreEqual (0, mc.CompareCount, "#K1");
1711                         Assert.IsNotNull (lvw.ListViewItemSorter, "#K2");
1712                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#K3");
1713                         Assert.AreEqual ("B", lvw.Items [0].Text, "#K4");
1714                         Assert.AreEqual ("A", lvw.Items [1].Text, "#K5");
1715                         Assert.AreEqual ("C", lvw.Items [2].Text, "#K6");
1716                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#K7");
1717
1718                         lvw.Sorting = SortOrder.None;
1719                         Assert.AreEqual (0, mc.CompareCount, "#L1");
1720 #if NET_2_0
1721                         // setting Sorting to None does not perform a sort and resets the
1722                         // ListViewItemSorter
1723                         Assert.IsNull (lvw.ListViewItemSorter, "#L2");
1724 #else
1725                         // setting Sorting to None does not perform a sort
1726                         Assert.IsNotNull (lvw.ListViewItemSorter, "#L2a");
1727                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#L2b");
1728 #endif
1729                         Assert.AreEqual ("B", lvw.Items [0].Text, "#L3");
1730                         Assert.AreEqual ("A", lvw.Items [1].Text, "#L4");
1731                         Assert.AreEqual ("C", lvw.Items [2].Text, "#L5");
1732                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#L6");
1733
1734                         // explicitly calling Sort when Sorting is None does nothing
1735                         lvw.Sort ();
1736                         Assert.AreEqual (0, mc.CompareCount, "#M1");
1737 #if NET_2_0
1738                         Assert.IsNull (lvw.ListViewItemSorter, "#M2");
1739 #else
1740                         Assert.IsNotNull (lvw.ListViewItemSorter, "#M2a");
1741                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#M2b");
1742 #endif
1743                         Assert.AreEqual ("B", lvw.Items [0].Text, "#M3");
1744                         Assert.AreEqual ("A", lvw.Items [1].Text, "#M4");
1745                         Assert.AreEqual ("C", lvw.Items [2].Text, "#M5");
1746                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#M6");
1747
1748                         lvw.Sorting = SortOrder.Ascending;
1749                         Assert.AreEqual (0, mc.CompareCount, "#N1");
1750 #if NET_2_0
1751                         Assert.IsNull (lvw.ListViewItemSorter, "#N2");
1752 #else
1753                         Assert.IsNotNull (lvw.ListViewItemSorter, "#N2a");
1754                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#N2b");
1755 #endif
1756                         Assert.AreEqual ("B", lvw.Items [0].Text, "#N3");
1757                         Assert.AreEqual ("A", lvw.Items [1].Text, "#N4");
1758                         Assert.AreEqual ("C", lvw.Items [2].Text, "#N5");
1759                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#N6");
1760
1761                         // explicitly set the custom IComparer again
1762                         lvw.ListViewItemSorter = mc;
1763                         Assert.AreEqual (0, mc.CompareCount, "#O1");
1764                         Assert.IsNotNull (lvw.ListViewItemSorter, "#O2");
1765                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#O3");
1766                         Assert.AreEqual ("B", lvw.Items [0].Text, "#O4");
1767                         Assert.AreEqual ("A", lvw.Items [1].Text, "#O5");
1768                         Assert.AreEqual ("C", lvw.Items [2].Text, "#O6");
1769                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#O7");
1770
1771                         // explicitly calling Sort when handle is not created does not
1772                         // result in sort operation
1773                         Assert.AreEqual (0, mc.CompareCount, "#P1");
1774                         Assert.IsNotNull (lvw.ListViewItemSorter, "#P2");
1775                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#P3");
1776                         Assert.AreEqual ("B", lvw.Items [0].Text, "#P4");
1777                         Assert.AreEqual ("A", lvw.Items [1].Text, "#P5");
1778                         Assert.AreEqual ("C", lvw.Items [2].Text, "#P6");
1779                         Assert.AreEqual ("BB", lvw.Items [3].Text, "#P7");
1780
1781                         // show the form to create the handle
1782                         form.Show ();
1783
1784                         // when the handle is created, the items are immediately sorted
1785                         Assert.IsTrue (mc.CompareCount > 0, "#Q1");
1786                         Assert.IsNotNull (lvw.ListViewItemSorter, "#Q2");
1787                         Assert.AreSame (mc, lvw.ListViewItemSorter, "#Q3");
1788                         Assert.AreEqual ("C", lvw.Items [0].Text, "#Q4");
1789                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#Q5");
1790                         Assert.AreEqual ("B", lvw.Items [2].Text, "#Q6");
1791                         Assert.AreEqual ("A", lvw.Items [3].Text, "#Q7");
1792
1793                         // setting ListViewItemSorter to null does not result in sort
1794                         // operation
1795                         lvw.ListViewItemSorter = null;
1796                         Assert.IsNull (lvw.ListViewItemSorter, "#R1");
1797                         Assert.AreEqual ("C", lvw.Items [0].Text, "#R2");
1798                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#R3");
1799                         Assert.AreEqual ("B", lvw.Items [2].Text, "#R4");
1800                         Assert.AreEqual ("A", lvw.Items [3].Text, "#R5");
1801
1802                         // explicitly calling sort does not result in sort operation
1803                         lvw.Sort ();
1804                         Assert.IsNull (lvw.ListViewItemSorter, "#S1");
1805                         Assert.AreEqual ("C", lvw.Items [0].Text, "#S2");
1806                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#S3");
1807                         Assert.AreEqual ("B", lvw.Items [2].Text, "#S4");
1808                         Assert.AreEqual ("A", lvw.Items [3].Text, "#S5");
1809
1810                         // modifying Sorting does not result in sort operation
1811                         lvw.Sorting = SortOrder.Ascending;
1812                         Assert.IsNull (lvw.ListViewItemSorter, "#T1");
1813                         Assert.AreEqual ("C", lvw.Items [0].Text, "#T2");
1814                         Assert.AreEqual ("BB", lvw.Items [1].Text, "#T3");
1815                         Assert.AreEqual ("B", lvw.Items [2].Text, "#T4");
1816                         Assert.AreEqual ("A", lvw.Items [3].Text, "#T5");
1817
1818                         form.Dispose ();
1819                 }
1820
1821                 private void AssertSort_Checked (View view)
1822                 {
1823                         Form form = new Form ();
1824                         form.ShowInTaskbar = false;
1825                         ListView lvw = CreateListView (view);
1826                         lvw.CheckBoxes = true;
1827                         form.Controls.Add (lvw);
1828
1829                         form.Show ();
1830
1831                         Assert.AreEqual (0, lvw.CheckedItems.Count, "#A1");
1832                         Assert.AreEqual (0, lvw.CheckedIndices.Count, "#A2");
1833
1834                         // select an item
1835                         lvw.Items [2].Checked = true;
1836                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#B1");
1837                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#B2");
1838                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#B3");
1839                         Assert.AreEqual (2, lvw.CheckedIndices [0], "#B4");
1840
1841                         // sort the items descending
1842                         lvw.Sorting = SortOrder.Descending;
1843                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#C1");
1844                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#C2");
1845                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#C3");
1846                         Assert.AreEqual (0, lvw.CheckedIndices [0], "#C4");
1847
1848                         // add an item, which ends up before the selected item after the
1849                         // sort operation
1850                         ListViewItem item = lvw.Items.Add ("D");
1851                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#D1");
1852                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#D2");
1853                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#D3");
1854                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#D4");
1855
1856                         // remove an item before the selected item
1857                         lvw.Items.Remove (item);
1858                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#E1");
1859                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#E2");
1860                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#E3");
1861                         Assert.AreEqual (0, lvw.CheckedIndices [0], "#E4");
1862
1863                         // insert an item before the selected item
1864                         lvw.Items.Insert (0, "D");
1865                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#F1");
1866                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#F2");
1867                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#F3");
1868                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#F4");
1869
1870                         // assign a custom comparer
1871                         MockComparer mc = new MockComparer (false);
1872                         lvw.ListViewItemSorter = mc;
1873
1874                         // items are re-sorted automatically
1875                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#G1");
1876                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#G2");
1877                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#G3");
1878                         Assert.AreEqual (2, lvw.CheckedIndices [0], "#G4");
1879
1880                         // modify sort order
1881                         lvw.Sorting = SortOrder.Ascending;
1882                         Assert.AreEqual (1, lvw.CheckedItems.Count, "#H1");
1883                         Assert.AreEqual (1, lvw.CheckedIndices.Count, "#H2");
1884                         Assert.AreEqual ("C", lvw.CheckedItems [0].Text, "#H3");
1885                         Assert.AreEqual (1, lvw.CheckedIndices [0], "#H4");
1886
1887                         form.Dispose ();
1888                 }
1889
1890                 private void AssertSort_Selected (View view)
1891                 {
1892                         Form form = new Form ();
1893                         form.ShowInTaskbar = false;
1894                         ListView lvw = CreateListView (view);
1895                         form.Controls.Add (lvw);
1896
1897                         form.Show ();
1898
1899                         Assert.AreEqual (0, lvw.SelectedItems.Count, "#A1");
1900                         Assert.AreEqual (0, lvw.SelectedIndices.Count, "#A2");
1901
1902                         // select an item
1903                         lvw.Items [2].Selected = true;
1904                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#B1");
1905                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#B2");
1906                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#B3");
1907                         Assert.AreEqual (2, lvw.SelectedIndices [0], "#B4");
1908
1909                         // sort the items descending
1910                         lvw.Sorting = SortOrder.Descending;
1911                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#C1");
1912                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#C2");
1913                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#C3");
1914                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#C4");
1915
1916                         // add an item, which ends up before the selected item after the
1917                         // sort operation
1918                         ListViewItem item = lvw.Items.Add ("D");
1919                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#D1");
1920                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#D2");
1921                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#D3");
1922                         Assert.AreEqual (1, lvw.SelectedIndices [0], "#D4");
1923
1924                         // remove an item before the selected item
1925                         lvw.Items.Remove (item);
1926                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#E1");
1927                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#E2");
1928                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#E3");
1929                         Assert.AreEqual (0, lvw.SelectedIndices [0], "#E4");
1930
1931                         // insert an item before the selected item
1932                         lvw.Items.Insert (0, "D");
1933                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#F1");
1934                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#F2");
1935                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#F3");
1936                         Assert.AreEqual (1, lvw.SelectedIndices [0], "#F4");
1937
1938                         // assign a custom comparer
1939                         MockComparer mc = new MockComparer (false);
1940                         lvw.ListViewItemSorter = mc;
1941
1942                         // items are re-sorted automatically
1943                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#G1");
1944                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#G2");
1945                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#G3");
1946                         Assert.AreEqual (2, lvw.SelectedIndices [0], "#G4");
1947
1948                         // modify sort order
1949                         lvw.Sorting = SortOrder.Ascending;
1950                         Assert.AreEqual (1, lvw.SelectedItems.Count, "#H1");
1951                         Assert.AreEqual (1, lvw.SelectedIndices.Count, "#H2");
1952                         Assert.AreEqual ("C", lvw.SelectedItems [0].Text, "#H3");
1953                         Assert.AreEqual (1, lvw.SelectedIndices [0], "#H4");
1954
1955                         form.Dispose ();
1956                 }
1957
1958                 private ListView CreateListView (View view)
1959                 {
1960                         ListView lvw = new ListView ();
1961                         lvw.View = view;
1962                         lvw.Items.Add ("B");
1963                         lvw.Items.Add ("A");
1964                         lvw.Items.Add ("C");
1965                         return lvw;
1966                 }
1967
1968                 private class MockComparer : IComparer
1969                 {
1970                         int _compareCount;
1971                         bool _throwException;
1972
1973                         public MockComparer (bool throwException)
1974                         {
1975                                 _throwException = throwException;
1976                         }
1977
1978                         public int CompareCount {
1979                                 get { return _compareCount; }
1980                         }
1981
1982                         public int Compare (object x, object y)
1983                         {
1984                                 _compareCount++;
1985                                 if (_throwException)
1986                                         throw new InvalidOperationException ();
1987
1988                                 ListViewItem item_x = x as ListViewItem;
1989                                 ListViewItem item_y = y as ListViewItem;
1990                                 SortOrder sortOrder = item_x.ListView.Sorting;
1991
1992                                 // we'll actually perform a reverse-sort
1993                                 if (sortOrder == SortOrder.Ascending)
1994                                         return String.Compare (item_y.Text, item_x.Text);
1995                                 else
1996                                         return String.Compare (item_x.Text, item_y.Text);
1997                         }
1998                 }
1999         }
2000 }