public void LowestCommonAncestorSteps_ValueTest(string input, int result) { var tree = Task6.GetOrbitTree(input); tree.ShouldNotBeNull(); var youNode = tree.First(a => a.Id == "YOU"); youNode.ShouldNotBeNull(); var sanNode = tree.First(a => a.Id == "SAN"); sanNode.ShouldNotBeNull(); Task6.LowestCommonAncestorSteps(youNode, sanNode).ShouldBe(result); }