public virtual void TreeViewItemPeerScroll()
{
TreeView view = new TreeView { Height = 20, ItemsSource = new int[] { 1, 2, 3, 4, 5 } };
TreeViewItem item = null;
TreeViewItemAutomationPeer peer = null;
IScrollItemProvider provider = null;
TestAsync(
5,
view,
() => item = view.ItemContainerGenerator.ContainerFromIndex(4) as TreeViewItem,
() => peer = FrameworkElementAutomationPeer.CreatePeerForElement(item) as TreeViewItemAutomationPeer,
() => provider = peer.GetPattern(PatternInterface.ScrollItem) as IScrollItemProvider,
() => provider.ScrollIntoView(),
() =>
{
foreach (DependencyObject obj in view.GetVisualChildren())
{
ScrollViewer viewer = obj as ScrollViewer;
if (viewer != null)
{
Assert.AreNotEqual(0, viewer.VerticalOffset, "ScrollHost was not scrolled!");
return;
}
}
Assert.Fail("Did not find the ScrollHost!");
});
}