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EDITING: text_filter_test.php

<?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/>.

namespace filter_emoticon;

use core\context\system as context_system;

/**
 * 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
 * @covers \filter_emoticon\text_filter
 */
final class text_filter_test extends \advanced_testcase {
    /**
     * Test that filter ignores nolink/pre element, and processes remaining text
     *
     * @param string $input
     * @param string $expectedprefix
     *
     * @dataProvider filter_emoticon_filtered_provider
     */
    public function test_filter_emoticon_filtered(string $input, string $expectedprefix): void {
        $this->resetAfterTest();

$filteredtext = $this->get_testable_filter_emoticon()->filter($input, [
            'originalformat' => FORMAT_HTML,
        ]);

$this->assertStringStartsWith($expectedprefix, $filteredtext);
        $this->assertStringEndsWith($this->get_converted_content_for_emoticon('(n)'), $filteredtext);
    }

/**
 * Data provider for {@see test_filter_emoticon_filtered}
 *
 * @return string[]
 */
 public static function filter_emoticon_filtered_provider(): array {
 return [
 'FORMAT_HTML is filtered' => [
 'input' => 'Hello(n)',
 'expectedprefix' => 'Hello',
 ],
 'Nested nolink should not be processed, emoticon postfix should be' => [
 'input' => '(n)(n)(n)',
 'expectedprefix' => '(n)(n)',
 ],
 'Nested pre should not be processed, emoticon postfix should be' => [
 'input' => '<pre><pre>(n)</pre>(n)</pre>(n)',
 'expectedprefix' => '<pre><pre>(n)</pre>(n)</pre>',
 ],
 ];
 }

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

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

/**
 * The data provider for filter emoticon tests, containing input that is not expected to be filtered
 *
 * @return array
 */
 public static function filter_emoticon_provider(): array {
 $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' => $grr,
 ],
 'Script tag should not be processed' => [
 'input' => "<script language='javascript'>alert('{$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)',
 ],
 '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>',
 ],
 ];
 }

/**
     * 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(): void {
        global $PAGE;
        $this->resetAfterTest();

$filter = $this->get_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(): void {
        global $CFG;
        $this->resetAfterTest();
        // Empty the emoticons array.
        $CFG->emoticons = null;

$filter = new text_filter(context_system::instance(), ['originalformat' => FORMAT_HTML]);

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

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

/**
     * Get a copy of the filter configured for testing.
     *
     * @param array ...$args
     * @return \filter_emoticon\text_filter
     */
    protected function get_testable_filter_emoticon(...$args): text_filter {
        return new class extends text_filter {
            // phpcs:ignore moodle.Commenting.MissingDocblock.MissingTestcaseMethodDescription
            public function __construct(...$args) {
                // Reset static emoticon caches.
                parent::$emoticontexts = [];
                parent::$emoticonimgs = [];
                // Use this context for filtering.
                $this->context = context_system::instance();
                // Define FORMAT_HTML as only one filtering in DB.
                set_config('formats', implode(',', [FORMAT_HTML]), 'filter_emoticon');
            }
        };
    }
}

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