TextFormatTest.php

<?php
/*
 * text_format_test.php - unit tests for the TextFormat class
 *
 * This program 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 2 of
 * the License, or (at your option) any later version.
 *
 * @author      Elmar Ludwig
 * @license     http://www.gnu.org/licenses/gpl-2.0.html GPL version 2
 * @category    Stud.IP
 */

function markupLine($markup, $matches)
{
    return '<hr>';
}

function markupHeading($markup, $matches)
{
    $level = max(1, 5 - mb_strlen($matches[1]));

    return sprintf('<h%d class="content">%s</h%d>', $level, $markup->format($matches[2]), $level);
}

function markupText($markup, $matches, $contents)
{
    static $tag = [
        '**' => 'b',
        '%%' => 'i',
        '__' => 'u',
        '##' => 'tt',
        '++' => 'big',
        '--' => 'small',
        '>>' => 'sup',
        '<<' => 'sub',
        '{-' => 'strike'
    ];

    $key = $matches[0];

    return sprintf('<%s>%s</%s>', $tag[$key], $contents, $tag[$key]);
}

function markupSimple($markup, $matches)
{
    static $tag = [
        '*' => 'b',
        '%' => 'i',
        '_' => 'u',
        '#' => 'tt',
        '+' => 'big',
        '-' => 'small',
        '>' => 'sup',
        '<' => 'sub'
    ];

    $key = $matches[0][0];
    $text = str_replace($key, ' ', $matches[1]);

    return sprintf('<%s>%s</%s>', $tag[$key], $markup->quote($text), $tag[$key]);
}

function markupImage($markup, $matches)
{
    if (mb_strlen($matches[1]) > 1) {
        $title = $markup->format(mb_substr($matches[1], 1));
    } else {
        $title = '';