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<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**
 * Unit tests for the random question type class.
 *
 * @package    qtype
 * @subpackage random
 * @copyright  2010 The Open University
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

global $CFG;
require_once($CFG->dirroot . '/question/type/random/questiontype.php');

/**
 * Unit tests for the random question type class.
 *
 * @copyright  2010 The Open University
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class qtype_random_test extends advanced_testcase {
    protected $qtype;

protected function setUp() {
        $this->qtype = new qtype_random();
    }

protected function tearDown() {
        $this->qtype = null;
    }

public function test_name() {
        $this->assertEquals($this->qtype->name(), 'random');
    }

public function test_can_analyse_responses() {
        $this->assertFalse($this->qtype->can_analyse_responses());
    }

public function test_get_random_guess_score() {
        $this->assertNull($this->qtype->get_random_guess_score(null));
    }

public function test_get_possible_responses() {
        $this->assertEquals(array(), $this->qtype->get_possible_responses(null));
    }

public function test_question_creation() {
        $this->resetAfterTest();
        question_bank::get_qtype('random')->clear_caches_before_testing();

$generator = $this->getDataGenerator()->get_plugin_generator('core_question');
        $cat = $generator->create_question_category();
        $question1 = $generator->create_question('shortanswer', null, array('category' => $cat->id));
        $question2 = $generator->create_question('numerical', null, array('category' => $cat->id));

$randomquestion = $generator->create_question('random', null, array('category' => $cat->id));

$expectedids = array($question1->id, $question2->id);
        $actualids = question_bank::get_qtype('random')->get_available_questions_from_category($cat->id, 0);
        sort($expectedids);
        sort($actualids);
        $this->assertEquals($expectedids, $actualids);

$q = question_bank::load_question($randomquestion->id);

$this->assertContains($q->id, array($question1->id, $question2->id));
    }
}