public void TestMethodConnectRecursive()
{
var tree = new TreeLinkNode(0);
tree.left = new TreeLinkNode(1);
tree.right = new TreeLinkNode(2);
tree.left.left = new TreeLinkNode(3);
tree.left.right = new TreeLinkNode(4);
tree.right.left = new TreeLinkNode(5);
tree.right.right = new TreeLinkNode(6);
ConnectSolution.ConnectRecursive(tree);
Assert.AreEqual("[0,#,1,2,#,3,4,5,6,#]", tree.ToString());
}
