public void Added_Child_Should_Have_VisualParent_Set()
{
var target = new TestVisual();
var child = new Visual();
target.AddChild(child);
Assert.Equal(target, child.GetVisualParent());
}
public void Removed_Child_Should_Have_VisualParent_Cleared()
{
var target = new TestVisual();
var child = new Visual();
target.AddChild(child);
target.RemoveChild(child);
Assert.Null(child.GetVisualParent());
}
public void Added_Child_Should_Notify_VisualParent_Changed()
{
var target = new TestVisual();
var child = new TestVisual();
var parents = new List <IVisual>();
child.GetObservable(Visual.VisualParentProperty).Subscribe(x => parents.Add(x));
target.AddChild(child);
target.RemoveChild(child);
Assert.Equal(new IVisual[] { null, target, null }, parents);
}