/**
 * Unit test cases for the implementation of a B-Tree.
 *
 * @author  __your_name___
 */

import static org.junit.jupiter.api.Assertions.*;
import org.junit.jupiter.api.Test;

public class BTreeTest
{
	/**
	 * the tree to use for testing
	 */
	private BTree<Integer> tree;

	// returns a tree loaded with the given items
	static BTree<Integer> load(int order, Integer... items)
	{
		IntComparator compare = new IntComparator();
		BTree<Integer> tree = new BTree<Integer>(order, compare);
		for (Integer value : items) {
			tree.add(value);
		}
		return tree;
	}

	/**
	 * Test the add method with tree of order 2
	 */
	@Test
	public void test_add_2()
	{
		// testing empty of order 2
		tree = load( 2 );
		tree.add( _a_number_ );
		assertEquals( tree.toString(), "[?]" );
uncomment later	//assertEquals( tree.toStringSorted(), "[?]" );

		// testing single tree of order 2
		tree = load( 2, _a_number_ );
		tree.add( _a_number_ );
		assertEquals( tree.toString(), "[? ?]" );
uncomment later	//assertEquals( tree.toStringSorted(), "[? ?]" );

                *** one test case for single is not enough ***
                *** too many test cases for single are not needed ***

		// testing multi tree of order 2
		tree = load( 2, s,e,v,e,r,a,l,n,u,m,b,e,r,s );
		tree.add( _a_number_ );
		assertEquals( multi.toString(), "[? ? ? ... ?]" );
uncomment later	//assertEquals( multi.toStringSorted(), "[? ? ? ... ?]" );

                *** one test case for multi may not be enough ***
	}

	/**
	 * Test the add method with tree of order 4
	 */
	@Test
	public void test_add_4()
	{

	}