public void Removing_Selected_Item_Should_Clear_Selection()
{
var items = new AvaloniaList <Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl
{
Items = items,
Template = Template(),
};
Prepare(target);
target.SelectedIndex = 1;
Assert.Equal(items[1], target.SelectedItem);
Assert.Equal(1, target.SelectedIndex);
SelectionChangedEventArgs receivedArgs = null;
target.SelectionChanged += (_, args) => receivedArgs = args;
var removed = items[1];
items.RemoveAt(1);
Assert.Null(target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
Assert.NotNull(receivedArgs);
Assert.Empty(receivedArgs.AddedItems);
Assert.Equal(new[] { removed }, receivedArgs.RemovedItems);
Assert.False(items.Single().IsSelected);
}
public void Removing_Selected_Item_Should_Clear_Selection_With_BeginInit()
{
var items = new AvaloniaList <Item>
{
new Item(),
new Item(),
};
var target = new SelectingItemsControl();
target.BeginInit();
target.Items = items;
target.Template = Template();
target.EndInit();
target.ApplyTemplate();
target.Presenter.ApplyTemplate();
target.SelectedIndex = 0;
Assert.Equal(items[0], target.SelectedItem);
Assert.Equal(0, target.SelectedIndex);
SelectionChangedEventArgs receivedArgs = null;
target.SelectionChanged += (_, args) => receivedArgs = args;
var removed = items[0];
items.RemoveAt(0);
Assert.Null(target.SelectedItem);
Assert.Equal(-1, target.SelectedIndex);
Assert.NotNull(receivedArgs);
Assert.Empty(receivedArgs.AddedItems);
Assert.Equal(new[] { removed }, receivedArgs.RemovedItems);
Assert.False(items.Single().IsSelected);
}