public void BindingExtensionRelativeSourceTemplatedParentTest()
{
string text = @"
<ControlTemplate xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' x:Name='root'>
<FrameworkElement x:Name='child' Width='{Binding Height, RelativeSource={RelativeSource TemplatedParent}}'/>
</ControlTemplate>";
ControlTemplate template = XamlLoader.Load(XamlParser.Parse(text)) as ControlTemplate;
Control control = new Control();
control.Template = template;
control.ApplyTemplate();
FrameworkElement child = NameScope.GetTemplateNameScope(control).FindName("child") as FrameworkElement;
Assert.AreEqual(control, child.TemplatedParent);
control.Height = 100;
Assert.AreEqual(100, child.Width);
control.ClearValue(FrameworkElement.HeightProperty);
child.SetValue(FrameworkElement.WidthProperty, 200.0, BaseValueSource.ParentTemplate);
Assert.AreEqual(200, control.Height);
}