@Test
public void testPrintMyTreeNode() {
MyTreeNode<String> root = new MyTreeNode<>(null, null, "root");
MyTreeNode<String> c1 = new MyTreeNode<>(root, null, "c1");
MyTreeNode<String> c2 = new MyTreeNode<>(root, null, "c2");
MyTreeNode<String> c3 = new MyTreeNode<>(root, null, "c3");
root.addChild(c1);
root.addChild(c2);
root.addChild(c3);
MyTreeNode<String> c11 = new MyTreeNode<>(null, null, "c1-1");
MyTreeNode<String> c12 = new MyTreeNode<>(null, null, "c1-2");
MyTreeNode<String> c13 = new MyTreeNode<>(null, null, "c1-3");
MyTreeNode<String> c21 = new MyTreeNode<>(null, null, "c2-1");
MyTreeNode<String> c22 = new MyTreeNode<>(null, null, "c2-2");
MyTreeNode<String> c23 = new MyTreeNode<>(null, null, "c2-3");
c1.addChild(c11);
c1.addChild(c12);
c1.addChild(c13);
c2.addChild(c21);
c2.addChild(c22);
c2.addChild(c23);
MyTreeNode<String> c231 = new MyTreeNode<>(null, null, "c2-3-1");
MyTreeNode<String> c232 = new MyTreeNode<>(null, null, "c2-3-2");
c23.addChild(c231);
c23.addChild(c232);
MyTreeNode<String> c31 = new MyTreeNode<>(null, null, "c3-1");
MyTreeNode<String> c32 = new MyTreeNode<>(null, null, "c3-2");
c3.addChild(c31);
c3.addChild(c32);
AlgUtil.printTreeNode(root);
}