public void add_a_different_input_type_adds_a_second_chain()
{
theGraph.Add(concreteCall);
theGraph.Add(concreteCall2);
theGraph.Add(concreteCall4);
theGraph.Add(concreteCall3);
theGraph.ShouldHaveCount(2);
theGraph.Select(x => x.InputType())
.ShouldHaveTheSameElementsAs(typeof(Input), typeof(DifferentInput));
}