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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 {@link \mod_quiz\local\structure\slot_random} class.
 *
 * @package    mod_quiz
 * @category   test
 * @copyright  2018 Shamim Rezaie <shamim@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

/**
 * Class mod_quiz_local_structure_slot_random_test
 * Class for tests related to the {@link \mod_quiz\local\structure\slot_random} class.
 *
 * @copyright  2018 Shamim Rezaie <shamim@moodle.com>
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class mod_quiz_local_structure_slot_random_test extends advanced_testcase {
    /**
     * Constructor test.
     */
    public function test_constructor() {
        global $SITE;

$this->resetAfterTest();
        $this->setAdminUser();

// Create a quiz.
        $quizgenerator = $this->getDataGenerator()->get_plugin_generator('mod_quiz');
        $quiz = $quizgenerator->create_instance(array('course' => $SITE->id, 'questionsperpage' => 3, 'grade' => 100.0));

// Create a question category in the system context.
        $questiongenerator = $this->getDataGenerator()->get_plugin_generator('core_question');
        $category = $questiongenerator->create_question_category();

// Create a random question without adding it to a quiz.
        // We don't want to use quiz_add_random_questions because that itself, instantiates an object from the slot_random class.
        $form = new stdClass();
        $form->category = $category->id . ',' . $category->contextid;
        $form->includesubcategories = true;
        $form->fromtags = [];
        $form->defaultmark = 1;
        $form->hidden = 1;
        $form->stamp = make_unique_id_code();
        $question = new stdClass();
        $question->qtype = 'random';
        $question = question_bank::get_qtype('random')->save_question($question, $form);

$randomslotdata = new stdClass();
        $randomslotdata->quizid = $quiz->id;
        $randomslotdata->questionid = $question->id;
        $randomslotdata->questioncategoryid = $category->id;
        $randomslotdata->includingsubcategories = 1;
        $randomslotdata->maxmark = 1;

$randomslot = new \mod_quiz\local\structure\slot_random($randomslotdata);

$rc = new ReflectionClass('\mod_quiz\local\structure\slot_random');
        $rcp = $rc->getProperty('record');
        $rcp->setAccessible(true);
        $record = $rcp->getValue($randomslot);

$this->assertEquals($quiz->id, $record->quizid);
        $this->assertEquals($question->id, $record->questionid);
        $this->assertEquals($category->id, $record->questioncategoryid);
        $this->assertEquals(1, $record->includingsubcategories);
        $this->assertEquals(1, $record->maxmark);
    }

public function test_get_quiz_quiz() {
        global $SITE, $DB;

$this->resetAfterTest();
        $this->setAdminUser();

quiz_add_random_questions($quiz, 0, $category->id, 1, false);

// Get the random question's id. It is at the first slot.
        $questionid = $DB->get_field('quiz_slots', 'questionid', array('quizid' => $quiz->id, 'slot' => 1));

$randomslotdata = new stdClass();
        $randomslotdata->quizid = $quiz->id;
        $randomslotdata->questionid = $questionid;
        $randomslotdata->questioncategoryid = $category->id;
        $randomslotdata->includingsubcategories = 1;
        $randomslotdata->maxmark = 1;

$randomslot = new \mod_quiz\local\structure\slot_random($randomslotdata);

// The create_instance had injected an additional cmid propery to the quiz. Let's remove that.
        unset($quiz->cmid);

$this->assertEquals($quiz, $randomslot->get_quiz());
    }

public function test_set_quiz() {
        global $SITE, $DB;

$this->resetAfterTest();
        $this->setAdminUser();

quiz_add_random_questions($quiz, 0, $category->id, 1, false);

// Get the random question's id. It is at the first slot.
        $questionid = $DB->get_field('quiz_slots', 'questionid', array('quizid' => $quiz->id, 'slot' => 1));

$randomslot = new \mod_quiz\local\structure\slot_random($randomslotdata);

// The create_instance had injected an additional cmid propery to the quiz. Let's remove that.
        unset($quiz->cmid);

$randomslot->set_quiz($quiz);

$rc = new ReflectionClass('\mod_quiz\local\structure\slot_random');
        $rcp = $rc->getProperty('quiz');
        $rcp->setAccessible(true);
        $quizpropery = $rcp->getValue($randomslot);

$this->assertEquals($quiz, $quizpropery);
    }

private function setup_for_test_tags($tagnames) {
        global $SITE, $DB;

quiz_add_random_questions($quiz, 0, $category->id, 1, false);

// Get the random question's id. It is at the first slot.
        $questionid = $DB->get_field('quiz_slots', 'questionid', array('quizid' => $quiz->id, 'slot' => 1));

$randomslot = new \mod_quiz\local\structure\slot_random($randomslotdata);

// Create tags.
        foreach ($tagnames as $tagname) {
            $tagrecord = array(
                'isstandard' => 1,
                'flag' => 0,
                'rawname' => $tagname,
                'description' => $tagname . ' desc'
            );
            $tags[$tagname] = $this->getDataGenerator()->create_tag($tagrecord);
        }

return array($randomslot, $tags);
    }

public function test_set_tags() {
        $this->resetAfterTest();
        $this->setAdminUser();

list($randomslot, $tags) = $this->setup_for_test_tags(['foo', 'bar']);
        $randomslot->set_tags([$tags['foo'], $tags['bar']]);