public TreeNode[] GetMock1()
{
TreeNode node1 = new TreeNode(1);
node1.left = new TreeNode(3);
node1.left.left = new TreeNode(5);
node1.right = new TreeNode(2);
TreeNode node2 = new TreeNode(2);
node2.left = new TreeNode(1);
node2.right = new TreeNode(3);
node2.left.right = new TreeNode(4);
node2.right.right = new TreeNode(7);
TreeNode[] treeArr = new TreeNode[2];
treeArr.SetValue(node1, 0);
treeArr.SetValue(node2, 1);
return(treeArr);
}