public void IEnumerableImplementation_ShouldBeAbleToIterateOverQueue()
{
// arrange
var expeced = new[] { "A", "B", "C" };
// act
_queue.Enqueue("A");
_queue.Enqueue("B");
_queue.Enqueue("C");
// assert
_queue.AsEnumerable().ShouldBeEqualTo(expeced);
}