InvertBinaryTreeTest.java

import org.example.helpers.TreeNode;
import org.example.problems.invert_binary_tree.Solution;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;

public class InvertBinaryTreeTest {
 @Test
 public void test() {
 TreeNode tree = new TreeNode(
 4,
 new TreeNode(
 2,
 new TreeNode(1),
 new TreeNode(3)
 ),
 new TreeNode(
 7,
 new TreeNode(6),
 new TreeNode(9)
 )
 );
 TreeNode expected = new TreeNode(
 4,
 new TreeNode(
 7,
 new TreeNode(9),
 new TreeNode(6)
 ),
 new TreeNode(
 2,
 new TreeNode(3),
 new TreeNode(1)
 )
 );
 Solution s = new Solution();
 Assertions.assertTrue(s.invertTree(tree).equals(expected));
 }
}