Test 7

import org.junit.Assert;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;

public class TestCeil4_shouldWorkCorrectly {

 @Test
    public void testCeil4_shouldWorkCorrectly() {
        BinarySearchTree<Integer> bst = new BinarySearchTree<>();
        Integer ceil = bst.ceil(9);
        Assert.assertNull(ceil);
        bst.insert(9);
        Assert.assertEquals(1, bst.count());
    }
}