Testes unitários nativos no CodeIgniter

Testes.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Testes extends CI_Controller {

	public function __construct()
	{
			parent::__construct();
			$this->load->library('unit_test');
	}

	public function UmMaisUm()
	{
		$test = 1 + 1;

		$expected_result = 2;

		$test_name = 'Um mais um';

		$str_template = 'ITEM | DESCRIÇÃO'.PHP_EOL.'{rows}{item} | {result}'.PHP_EOL.'{/rows}';

		$this->unit->set_template($str_template);

		echo $this->unit->run($test, $expected_result, $test_name);
	}
}