public void insert_before_on_a_node()
{
var chain = new BehaviorChain();
var wrapper = new Wrapper(typeof (ObjectDefInstanceTester.FakeJsonBehavior));
chain.Append(wrapper);
var wrapper2 = new Wrapper(typeof (ObjectDefInstanceTester.FakeJsonBehavior));
wrapper.InsertDirectlyBefore(wrapper2);
chain.Top.ShouldBeTheSameAs(wrapper2);
wrapper2.Next.ShouldBeTheSameAs(wrapper);
wrapper2.Previous.ShouldBeTheSameAs(chain);
wrapper.Previous.ShouldBeTheSameAs(wrapper2);
}