public void ShouldFindVisualAncestor()
{
var root = new Grid();
var child1a = new Border();
var child1b = new TextBlock();
var child3 = new TextBlock();
root.Children.Add(child1a);
root.Children.Add(child1b);
child1a.Child = child3;
child3.FindFirstVisualAncestor<Grid>().ShouldBe(root);
child3.FindFirstVisualAncestor<Border>().ShouldBe(child1a);
child3.FindFirstVisualAncestor<Border>().ShouldNotBe(child1b);
child3.FindFirstVisualAncestor<StackPanel>().ShouldBe(null);
}