Simple BinaryTree tester

BinaryTreeTest.java

import com.cgon.BinaryTree;
import static org.junit.Assert.*;
import org.junit.Test;

public class JUnitTest {
    
    BinaryTree node1 = new BinaryTree(2,null,null);
    BinaryTree node2 = new BinaryTree(3,null,null);
    BinaryTree node3 = new BinaryTree(4, node1, node2);
    BinaryTree node4 = new BinaryTree(5, null, null);
    BinaryTree root = new BinaryTree(6, node3, node4);
    
    @Test
    public void test_sum(){
        assertEquals(20, root.sumAll());
        System.out.println(root.toString());
    }
}