<?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 (some of) mod/quiz/editlib.php.
 *
 * @package    mod_quiz
 * @category   phpunit
 * @copyright  2009 Tim Hunt
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */


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

global $CFG;
require_once($CFG->dirroot . '/mod/quiz/editlib.php');


/**
 * Unit tests for (some of) mod/quiz/editlib.php.
 *
 * @copyright  2009 Tim Hunt
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class mod_quiz_editlib_testcase extends basic_testcase {
    public function test_quiz_move_question_up() {
        $this->assertEquals(quiz_move_question_up('0', 123), '0');
        $this->assertEquals(quiz_move_question_up('1,2,0', 1), '1,2,0');
        $this->assertEquals(quiz_move_question_up('1,2,0', 0), '1,2,0');
        $this->assertEquals(quiz_move_question_up('1,2,0', 2), '2,1,0');
        $this->assertEquals(quiz_move_question_up('1,2,0,3,4,0', 3), '1,2,3,0,4,0');
        $this->assertEquals(quiz_move_question_up('1,2,3,0,4,0', 4), '1,2,3,4,0,0');
    }

    public function test_quiz_move_question_down() {
        $this->assertEquals(quiz_move_question_down('0', 123), '0');
        $this->assertEquals(quiz_move_question_down('1,2,0', 2), '1,2,0');
        $this->assertEquals(quiz_move_question_down('1,2,0', 0), '1,2,0');
        $this->assertEquals(quiz_move_question_down('1,2,0', 1), '2,1,0');
        $this->assertEquals(quiz_move_question_down('1,2,0,3,4,0', 2), '1,0,2,3,4,0');
        $this->assertEquals(quiz_move_question_down('1,0,2,3,0,4,0', 1), '0,1,2,3,0,4,0');
    }

    public function test_quiz_delete_empty_page() {
        $this->assertEquals(quiz_delete_empty_page('0', 0), '0');
        $this->assertEquals(quiz_delete_empty_page('1,2,0', 2), '1,2,0');
        $this->assertEquals(quiz_delete_empty_page('0,1,2,0', -1), '1,2,0');
        $this->assertEquals(quiz_delete_empty_page('0,1,2,0', 0), '0,1,2,0');
        $this->assertEquals(quiz_delete_empty_page('1,2,0', 3), '1,2,0');
        $this->assertEquals(quiz_delete_empty_page('1,2,0', -1), '1,2,0');
        $this->assertEquals(quiz_delete_empty_page('1,2,0,0', 2), '1,2,0');
        $this->assertEquals(quiz_delete_empty_page('1,2,0,0', 1), '1,2,0,0');
        $this->assertEquals(quiz_delete_empty_page('1,2,0,0,3,4,0', 2), '1,2,0,3,4,0');
        $this->assertEquals(quiz_delete_empty_page('0,0,1,2,0', 0), '0,1,2,0');
    }

    public function test_quiz_add_page_break_after() {
        $this->assertEquals(quiz_add_page_break_after('0', 1), '0');
        $this->assertEquals(quiz_add_page_break_after('1,2,0', 1), '1,0,2,0');
        $this->assertEquals(quiz_add_page_break_after('1,2,0', 2), '1,2,0,0');
        $this->assertEquals(quiz_add_page_break_after('1,2,0', 0), '1,2,0');
    }

    public function test_quiz_add_page_break_at() {
        $this->assertEquals(quiz_add_page_break_at('0', 0), '0,0');
        $this->assertEquals(quiz_add_page_break_at('1,2,0', 0), '0,1,2,0');
        $this->assertEquals(quiz_add_page_break_at('1,2,0', 1), '1,0,2,0');
        $this->assertEquals(quiz_add_page_break_at('1,2,0', 2), '1,2,0,0');
        $this->assertEquals(quiz_add_page_break_at('1,2,0', 3), '1,2,0');
    }

    public function test_quiz_question_tostring() {
        $question = new stdClass();
        $question->qtype = 'multichoice';
        $question->name = 'The question name';
        $question->questiontext = '<p>What sort of <b>inequality</b> is x &lt; y<img alt="?" src="..."></p>';
        $question->questiontextformat = FORMAT_HTML;

        $summary = quiz_question_tostring($question);
        $this->assertEquals('<span class="questionname">The question name</span>' .
                '<span class="questiontext">What sort of INEQUALITY is x &lt; y[?]</span>', $summary);
    }
}