public void CallFromQueue()
{
Sut.Add("Can");
Sut.Add("Sergen");
Sut.Add("Emre");
Sut.Add("Hami");
Sut.Add("Gamze");
var next1 = Sut.Call();
var next2 = Sut.Call();
Assert.AreEqual(3, Sut.GetItemCount());
Assert.AreEqual("Can", next1);
Assert.AreEqual("Sergen", next2);
}