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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/>.

/**
 * Skype icons filter phpunit tests
 *
 * @package    filter_emoticon
 * @category   test
 * @copyright  2013 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

global $CFG;
require_once($CFG->dirroot . '/filter/emoticon/filter.php'); // Include the code to test.

/**
 * Skype icons filter testcase.
 */
class filter_emoticon_testcase extends advanced_testcase {

/**
     * Tests the filter doesn't affect nolink classes.
     *
     * @dataProvider filter_emoticon_provider
     */
    public function test_filter_emoticon($input, $format, $expected) {
        $this->resetAfterTest();

$filter = new testable_filter_emoticon();
        $this->assertEquals($expected, $filter->filter($input, [
                'originalformat' => $format,
            ]));
    }

/**
 * The data provider for filter emoticon tests.
 *
 * @return array
 */
 public function filter_emoticon_provider() {
 $grr = '(grr)';
 return [
 'FORMAT_MOODLE is not filtered' => [
 'input' => $grr,
 'format' => FORMAT_MOODLE,
 'expected' => $grr,
 ],
 'FORMAT_MARKDOWN is not filtered' => [
 'input' => $grr,
 'format' => FORMAT_MARKDOWN,
 'expected' => $grr,
 ],
 'FORMAT_PLAIN is not filtered' => [
 'input' => $grr,
 'format' => FORMAT_PLAIN,
 'expected' => $grr,
 ],
 'FORMAT_HTML is filtered' => [
 'input' => $grr,
 'format' => FORMAT_HTML,
 'expected' => $this->get_converted_content_for_emoticon($grr),
 ],
 'Script tag should not be processed' => [
 'input' => "<script language='javascript'>alert('{$grr}');</script>",
 'format' => FORMAT_HTML,
 'expected' => "<script language='javascript'>alert('{$grr}');</script>",
 ],
 'Basic nolink should not be processed' => [
 'input' => '(n)',
 'format' => FORMAT_HTML,
 'expected' => '(n)',
 ],
 'Nested nolink should not be processed' => [
 'input' => '(n)(n)',
 'format' => FORMAT_HTML,
 'expected' => '(n)(n)',
 ],
 'Nested nolink should not be processed but following emoticon' => [
 'input' => '(n)(n)(n)',
 'format' => FORMAT_HTML,
 'expected' => '(n)(n)' . $this->get_converted_content_for_emoticon('(n)'),
 ],
 'Basic pre should not be processed' => [
 'input' => '<pre>(n)</pre>',
 'format' => FORMAT_HTML,
 'expected' => '<pre>(n)</pre>',
 ],
 'Nested pre should not be processed' => [
 'input' => '<pre><pre>(n)</pre>(n)</pre>',
 'format' => FORMAT_HTML,
 'expected' => '<pre><pre>(n)</pre>(n)</pre>',
 ],
 'Nested pre should not be processed but following emoticon' => [
 'input' => '<pre><pre>(n)</pre>(n)</pre>(n)',
 'format' => FORMAT_HTML,
 'expected' => '<pre><pre>(n)</pre>(n)</pre>' . $this->get_converted_content_for_emoticon('(n)'),
 ],
 ];
 }

/**
     * Translate the text for a single emoticon into the rendered value.
     *
     * @param   string  $text The text to translate.
     * @return  string
     */
    public function get_converted_content_for_emoticon($text) {
        global $OUTPUT;
        $manager = get_emoticon_manager();
        $emoticons = $manager->get_emoticons();
        foreach ($emoticons as $emoticon) {
            if ($emoticon->text == $text) {
                return $OUTPUT->render($manager->prepare_renderable_emoticon($emoticon));
            }
        }

return $text;
    }

/**
     * Tests the filter doesn't break anything if activated but invalid format passed.
     *
     */
    public function test_filter_invalidformat() {
        global $PAGE;
        $this->resetAfterTest();

$filter = new testable_filter_emoticon();
        $input = '(grr)';
        $expected = '(grr)';

$this->assertEquals($expected, $filter->filter($input, [
            'originalformat' => 'ILLEGALFORMAT',
        ]));
    }

/**
     * Tests the filter doesn't break anything if activated but no emoticons available.
     *
     */
    public function test_filter_emptyemoticons() {
        global $CFG;
        $this->resetAfterTest();
        // Empty the emoticons array.
        $CFG->emoticons = null;

$filter = new filter_emoticon(context_system::instance(), array('originalformat' => FORMAT_HTML));

$input = '(grr)';
        $expected = '(grr)';

$this->assertEquals($expected, $filter->filter($input, [
            'originalformat' => FORMAT_HTML,
        ]));
    }
}

/**
 * Subclass for easier testing.
 */
class testable_filter_emoticon extends filter_emoticon {
    public function __construct() {
        // Reset static emoticon caches.
        parent::$emoticontexts = array();
        parent::$emoticonimgs = array();
        // Use this context for filtering.
        $this->context = context_system::instance();
        // Define FORMAT_HTML as only one filtering in DB.
        set_config('formats', implode(',', array(FORMAT_HTML)), 'filter_emoticon');
    }
}