<?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.
 *
 * @package filter_glossary
 * @category test
 * @copyright 2013 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 . '/filter/glossary/filter.php'); // Include the code to test.

/**
 * Test case for glossary.
 */
class filter_glossary_filter_testcase extends advanced_testcase {

    /**
     * Test ampersands.
     */
    public function test_ampersands() {
        global $CFG;
        $this->resetAfterTest(true);

        // Enable glossary filter at top level.
        filter_set_global_state('glossary', TEXTFILTER_ON);
        $CFG->glossary_linkentries = 1;

        // Create a test course.
        $course = $this->getDataGenerator()->create_course();
        $context = context_course::instance($course->id);

        // Create a glossary.
        $glossary = $this->getDataGenerator()->create_module('glossary',
                array('course' => $course->id, 'mainglossary' => 1));

        // Create two entries with ampersands and one normal entry.
        $generator = $this->getDataGenerator()->get_plugin_generator('mod_glossary');
        $normal = $generator->create_content($glossary, array('concept' => 'normal'));
        $amp1 = $generator->create_content($glossary, array('concept' => 'A&B'));
        $amp2 = $generator->create_content($glossary, array('concept' => 'C&amp;D'));

        // Format text with all three entries in HTML.
        $html = '<p>A&amp;B C&amp;D normal</p>';
        $filtered = format_text($html, FORMAT_HTML, array('context' => $context));

        // Find all the glossary links in the result.
        $matches = array();
        preg_match_all('~courseid=' . $course->id . '&amp;eid=([0-9]+).*?title="(.*?)"~', $filtered, $matches);

        // There should be 3 glossary links.
        $this->assertEquals(3, count($matches[1]));
        $this->assertEquals($amp1->id, $matches[1][0]);
        $this->assertEquals($amp2->id, $matches[1][1]);
        $this->assertEquals($normal->id, $matches[1][2]);

        // Check text and escaping of title attribute.
        $this->assertEquals($glossary->name . ': A&amp;B', $matches[2][0]);
        $this->assertEquals($glossary->name . ': C&amp;D', $matches[2][1]);
        $this->assertEquals($glossary->name . ': normal', $matches[2][2]);
    }
}