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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/>.

/**
 * Unit tests for config only library functions-
 *
 * @package    core
 * @category   phpunit
 * @copyright  2012 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

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

// Global $CFG not used here intentionally to make sure it is not required inside the lib.
require_once(__DIR__ . '/../configonlylib.php');

/**
 * Unit tests for config only library functions.
 *
 * @package    core
 * @category   phpunit
 * @copyright  2012 Petr Skoda {@link http://skodak.org}
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class core_configonlylib_testcase extends advanced_testcase {

/**
     * Test cleaning of invalid utf-8 entities.
     */
    public function test_min_fix_utf8() {
        $this->assertSame('abc', min_fix_utf8('abc'));
        $this->assertSame("žlutý koníček přeskočil potůček \n\t\r", min_fix_utf8("žlutý koníček přeskočil potůček \n\t\r\0"));
        $this->assertSame('aš', min_fix_utf8('a'.chr(130).'š'), 'This fails with buggy iconv() when mbstring extenstion is not available as fallback.');
    }

/**
     * Test minimalistic parameter cleaning.
     */
    public function test_min_clean_param() {
        $this->assertSame('foo', min_clean_param('foo', 'RAW'));
        $this->assertSame('aš', min_clean_param('a'.chr(130).'š', 'RAW'));

$this->assertSame(1, min_clean_param('1', 'INT'));
        $this->assertSame(1, min_clean_param('1aa', 'INT'));

$this->assertSame('1abc-d_f', min_clean_param('/.1ačž"b?;c-d{}\\_f.', 'SAFEDIR'));
        $this->assertSame(1, min_clean_param('1aa', 'INT'));

$this->assertSame('/a/b/./c5', min_clean_param('/a*?$//b/.../c5', 'SAFEPATH'));
        $this->assertSame(1, min_clean_param('1aa', 'INT'));
    }

/**
     * Test minimalistic getting of page parameters.
     */
    public function test_min_optional_param() {
        $this->resetAfterTest();

$_GET['foo'] = 'bar';
        $_GET['num'] = '1';
        $_GET['xnum'] = '1aa';

$_POST['foo'] = 'rebar';
        $_POST['oof'] = 'rab';

$this->assertSame('bar', min_optional_param('foo', null, 'RAW'));
        $this->assertSame(null, min_optional_param('foo2', null, 'RAW'));
        $this->assertSame('rab', min_optional_param('oof', null, 'RAW'));

$this->assertSame(1, min_optional_param('num', null, 'INT'));
        $this->assertSame(1, min_optional_param('xnum', null, 'INT'));
    }

/**
     * Test fail-safe minimalistic slashargument processing.
     */
    public function test_min_get_slash_argument() {
        global $CFG;

$this->resetAfterTest();
        $this->assertEquals('https://www.example.com/moodle', $CFG->wwwroot);

$_SERVER = array();
        $_SERVER['SERVER_SOFTWARE'] = 'Apache/2.2.22 (Unix)';
        $_SERVER['QUERY_STRING'] = 'theme=standard&component=core&rev=5&image=u/f1';
        $_SERVER['REQUEST_URI'] = '/moodle/theme/image.php?theme=standard&component=core&rev=5&image=u/f1';
        $_SERVER['SCRIPT_NAME'] = '/moodle/theme/image.php';
        $this->assertSame('', min_get_slash_argument());

$_SERVER = array();
        $_SERVER['SERVER_SOFTWARE'] = 'Apache/2.2.22 (Unix)';
        $_SERVER['QUERY_STRING'] = '';
        $_SERVER['REQUEST_URI'] = '/moodle/theme/image.php/standard/core/5/u/f1';
        $_SERVER['PATH_INFO'] = '/standard/core/5/u/f1';
        $_SERVER['SCRIPT_NAME'] = '/moodle/theme/image.php';
        $_GET = array();
        $this->assertSame('/standard/core/5/u/f1', min_get_slash_argument());

// IIS no url rewriting.
        $_SERVER = array();
        $_SERVER['SERVER_SOFTWARE'] = 'Microsoft-IIS/7.0';
        $_SERVER['QUERY_STRING'] = '';
        $_SERVER['REQUEST_URI'] = '/moodle/theme/image.php/standard/core/5/u/f1';
        $_SERVER['PATH_INFO'] = '/standard/core/5/u/f1';
        $_SERVER['SCRIPT_NAME'] = '/moodle/theme/image.php';
        $_GET = array();
        $this->assertSame('/standard/core/5/u/f1', min_get_slash_argument());

// IIS with url rewriting.
        $_SERVER = array();
        $_SERVER['SERVER_SOFTWARE'] = 'Microsoft-IIS/7.0';
        $_SERVER['QUERY_STRING'] = 'file=/standard/core/5/u/f1';
        $_SERVER['REQUEST_URI'] = '/moodle/theme/image.php/standard/core/5/u/f1';
        $_SERVER['PATH_INFO'] = '/';
        $_SERVER['SCRIPT_NAME'] = '/moodle/theme/image.php';
        $_GET = array();
        $_GET['file'] = '/standard/core/5/u/f1';
        $this->assertSame('/standard/core/5/u/f1', min_get_slash_argument());

$_SERVER = array();
        $_SERVER['SERVER_SOFTWARE'] = 'Weird server';
        $_SERVER['QUERY_STRING'] = '';
        $_SERVER['REQUEST_URI'] = '/moodle/theme/image.php/standard/core/5/u/f1';
        $_SERVER['PATH_INFO'] = '/moodle/theme/image.php/standard/core/5/u/f1';
        $_SERVER['SCRIPT_NAME'] = '/moodle/theme/image.php';
        $_GET = array();
        $this->assertSame('/standard/core/5/u/f1', min_get_slash_argument());

$_SERVER = array();
        $_SERVER['SERVER_SOFTWARE'] = 'Hacker server';
        $_SERVER['QUERY_STRING'] = '';
        $_SERVER['REQUEST_URI'] = '/moodle/theme/image.php/standard/core/5/u/f1';
        $_SERVER['PATH_INFO'] = '/moodle/theme/image.php/standard\\core/..\\../5/u/f1';
        $_SERVER['SCRIPT_NAME'] = '/moodle/theme/image.php';
        $_GET = array();
        // Windows dir separators are removed, multiple ... gets collapsed to one .
        $this->assertSame('/standardcore/./5/u/f1', min_get_slash_argument());
    }
}