public void ReverseSort() { //Arrange List <Node> list = new List <Node> { new Node(5), new Node(1) }; SelectionSort b = new SelectionSort(list); //Act List <Node> result = b.ReverseSort().ToList(); //Assert Assert.AreEqual(1, result.ElementAt(0).Number); Assert.AreEqual(5, result.ElementAt(1).Number); }