public void GetCommonAncestor_V1Test() { var model = new _4_8(); var node1 = new TreeNode(12); var node2 = new TreeNode(8); var node3 = new TreeNode(2); var node4 = new TreeNode(9); var node5 = new TreeNode(15); var node6 = new TreeNode(11); node2.Parent = node1; node5.Parent = node1; node3.Parent = node2; node4.Parent = node2; node6.Parent = node4; Assert.AreEqual(9, model.GetCommonAncestor_V1(node6, node4).Data); }