@Test
	public void testInorder() {
		tree = new BinarySearchTree<String, String>();
		previousli = tree.inOrder(tree.returnRoot());
		String[] orderTest = {"DW-210","DW-211","DW-2100"};

		for(int i= previousli.size()-1;i>=0;i--){
			assertEquals(orderTest[i],previousli.get(i));
		}
	}