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