public void ToggleExtent_Backward()
{
var collection = new VirtualCollection(10);
var selection = new AsyncDataGridRowSelection(collection);
selection.ToggleSingle(5);
selection.ToggleSingle(3, true);
int selectionChanged = 0;
selection.SelectionChanged += (s, e) => ++ selectionChanged;
selection.ToggleExtent(1);
Assert.Equal(R(1, 4), selection.GetSnapshot());
Assert.Equal(1, collection.FocusIndex);
Assert.Equal(1, selectionChanged);
}
public void ToggleSingle_Extend()
{
var collection = new VirtualCollection(10);
var selection = new AsyncDataGridRowSelection(collection);
selection.Select(5);
int selectionChanged = 0;
selection.SelectionChanged += (s, e) => ++ selectionChanged;
selection.ToggleSingle(2, true);
selection.ToggleSingle(3, true);
Assert.Equal(R(2, 4, 5, 6), selection.GetSnapshot());
Assert.Equal(3, collection.FocusIndex);
Assert.Equal(2, selectionChanged);
}