Move test to existing test case.

tests/Avalonia.Controls.UnitTests/Selection/InternalSelectionModelTests.cs

@@ -232,39 +232,6 @@ namespace Avalonia.Controls.UnitTests.Selection
             Assert.Contains(nameof(target.SelectedItem), changed);
         }
 
-        [Fact]
-        public void Raises_Selection_Changed_On_Item_Move()
-        {
-            var items = new AvaloniaList<string>(new[] { "foo", "bar", "baz" });
-            var target = CreateTarget(source: items);
-
-            target.SelectedIndex = 1;
-
-            var changed = new List<string>();
-
-            target.PropertyChanged += (s, e) => changed.Add(e.PropertyName);
-
-            var oldSelectedIndex = target.SelectedIndex;
-            var oldSelectedItem = target.SelectedItem;
-
-
-            var sel = items[1];
-            var other = items[2];
-
-            items[2] = sel;
-            items[1] = other;
-
-            Assert.NotEqual(oldSelectedIndex, target.SelectedIndex);
-            Assert.NotEqual(oldSelectedItem, target.SelectedItem);
-
-            Assert.Equal(-1, target.SelectedIndex);
-            Assert.Equal(null, target.SelectedItem);
-
-            Assert.Contains(nameof(target.SelectedIndex), changed);
-            Assert.Contains(nameof(target.SelectedItem), changed);
-        }
-
-
         [Fact]
         public void Preserves_SelectedItem_On_Items_Reset()
         {

tests/Avalonia.Controls.UnitTests/Selection/SelectionModelTests_Multiple.cs

@@ -1216,6 +1216,7 @@ namespace Avalonia.Controls.UnitTests.Selection
                 var data = (AvaloniaList<string>)target.Source!;
                 var selectionChangedRaised = 0;
                 var selectedIndexRaised = 0;
+                var selectedItemRaised = 0;
                 var indexesChangedRaised = 0;
 
                 target.Source = data;
@@ -1227,6 +1228,11 @@ namespace Avalonia.Controls.UnitTests.Selection
                     {
                         ++selectedIndexRaised;
                     }
+
+                    if (e.PropertyName == nameof(target.SelectedItem))
+                    {
+                        ++selectedItemRaised;
+                    }
                 };
 
                 target.IndexesChanged += (s, e) => ++indexesChangedRaised;
@@ -1249,6 +1255,7 @@ namespace Avalonia.Controls.UnitTests.Selection
                 Assert.Equal(2, target.AnchorIndex);
                 Assert.Equal(1, selectionChangedRaised);
                 Assert.Equal(1, selectedIndexRaised);
+                Assert.Equal(1, selectedItemRaised);
                 Assert.Equal(0, indexesChangedRaised);
             }
 

tests/Avalonia.Controls.UnitTests/Selection/SelectionModelTests_Single.cs

@@ -1040,6 +1040,7 @@ namespace Avalonia.Controls.UnitTests.Selection
                 var data = (AvaloniaList<string>)target.Source!;
                 var selectionChangedRaised = 0;
                 var selectedIndexRaised = 0;
+                var selectedItemRaised = 0;
 
                 target.Source = data;
                 target.Select(1);
@@ -1050,6 +1051,11 @@ namespace Avalonia.Controls.UnitTests.Selection
                     {
                         ++selectedIndexRaised;
                     }
+
+                    if (e.PropertyName == nameof(target.SelectedItem))
+                    {
+                        ++selectedItemRaised;
+                    }
                 };
 
                 target.SelectionChanged += (s, e) =>
@@ -1070,6 +1076,7 @@ namespace Avalonia.Controls.UnitTests.Selection
                 Assert.Equal(-1, target.AnchorIndex);
                 Assert.Equal(1, selectionChangedRaised);
                 Assert.Equal(1, selectedIndexRaised);
+                Assert.Equal(1, selectedItemRaised);
             }
 
             [Fact]