public void AfterSet_TheSameValueIsReturned()
{
var instance = new Grid();
sut.SetValue(property, instance, SomeValue);
var actual = sut.GetValue(property, instance);
Assert.Equal(SomeValue, actual);
}
public void SetValue(AttachedProperty property, object instance, object value)
{
attachedEngine.SetValue(property, instance, value);
}