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analytics	[ DIR ]	drwxr-xr-x
behat	[ DIR ]	drwxr-xr-x
content	[ DIR ]	drwxr-xr-x
event	[ DIR ]	drwxr-xr-x
external	[ DIR ]	drwxr-xr-x
fixtures	[ DIR ]	drwxr-xr-x
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plugininfo	[ DIR ]	drwxr-xr-x
accesslib_has_capability_test....	29.73 KB	-rw-rw-r--
accesslib_test.php	219.29 KB	-rw-rw-r--
adhoc_task_test.php	18.44 KB	-rw-rw-r--
adminlib_test.php	4.38 KB	-rw-rw-r--
admintree_test.php	17.32 KB	-rw-r--r--
ajaxlib_test.php	4.36 KB	-rw-rw-r--
analysers_test.php	12.95 KB	-rw-r--r--
antivirus_test.php	8.69 KB	-rw-rw-r--
authlib_test.php	19.91 KB	-rw-r--r--
blocklib_test.php	35.27 KB	-rw-rw-r--
calendar_cron_task_test.php	2.69 KB	-rw-rw-r--
check_test.php	1.97 KB	-rw-r--r--
client_test.php	4.34 KB	-rw-r--r--
collator_test.php	11.99 KB	-rw-r--r--
completion_daily_task_test.php	5.24 KB	-rw-r--r--
completionlib_test.php	62.1 KB	-rw-rw-r--
component_test.php	40.17 KB	-rw-rw-r--
componentlib_test.php	6.64 KB	-rw-r--r--
configonlylib_test.php	6.15 KB	-rw-r--r--
content_test.php	4.77 KB	-rw-r--r--
core_media_player_native_test....	6.54 KB	-rw-r--r--
core_renderer_template_exploit...	17.28 KB	-rw-r--r--
coverage.php	1.93 KB	-rw-rw-r--
cronlib_test.php	6.89 KB	-rw-r--r--
csslib_test.php	1.79 KB	-rw-r--r--
csvclass_test.php	5.57 KB	-rw-r--r--
curl_security_helper_test.php	14.71 KB	-rw-r--r--
customcontext_test.php	3.79 KB	-rw-r--r--
dataformat_test.php	3.74 KB	-rw-r--r--
datalib_test.php	47.8 KB	-rw-r--r--
datalib_update_with_unique_ind...	6.31 KB	-rw-r--r--
date_legacy_test.php	13.9 KB	-rw-r--r--
date_test.php	24.48 KB	-rw-rw-r--
editorlib_test.php	2.01 KB	-rw-r--r--
encryption_test.php	8.68 KB	-rw-r--r--
environment_test.php	8.54 KB	-rw-r--r--
event_context_locked_test.php	4.11 KB	-rw-r--r--
event_course_module_instance_l...	2.7 KB	-rw-r--r--
event_course_module_viewed.php	3.33 KB	-rw-r--r--
event_deprecated_test.php	1.49 KB	-rw-r--r--
event_grade_deleted_test.php	3.25 KB	-rw-r--r--
event_profile_field_test.php	12.44 KB	-rw-r--r--
event_unknown_logged_test.php	1.92 KB	-rw-r--r--
event_user_graded_test.php	10.07 KB	-rw-r--r--
event_user_password_updated_te...	2.89 KB	-rw-r--r--
exporter_test.php	11.02 KB	-rw-r--r--
externallib_test.php	29.7 KB	-rw-r--r--
filelib_test.php	70.92 KB	-rw-rw-r--
filestorage_zip_archive_test.p...	2.75 KB	-rw-r--r--
filetypes_test.php	10.2 KB	-rw-r--r--
filter_manager_test.php	3.48 KB	-rw-r--r--
filterlib_test.php	36.72 KB	-rw-r--r--
formslib_test.php	39.6 KB	-rw-r--r--
gdlib_test.php	5.92 KB	-rw-r--r--
googlelib_test.php	1.54 KB	-rw-r--r--
gradelib_test.php	9.74 KB	-rw-r--r--
grades_externallib_test.php	24.66 KB	-rw-rw-r--
grading_externallib_test.php	26.27 KB	-rw-r--r--
grouplib_test.php	84.23 KB	-rw-rw-r--
h5p_clean_orphaned_records_tas...	3.12 KB	-rw-r--r--
h5p_get_content_types_task_tes...	2.69 KB	-rw-r--r--
html2text_test.php	7.58 KB	-rw-r--r--
html_writer_test.php	8.74 KB	-rw-rw-r--
htmlpurifier_test.php	22.67 KB	-rw-r--r--
ip_utils_test.php	14.27 KB	-rw-r--r--
jquery_test.php	1.76 KB	-rw-r--r--
ldaplib_test.php	17.72 KB	-rw-r--r--
licenselib_test.php	11.58 KB	-rw-r--r--
lock_config_test.php	3.39 KB	-rw-r--r--
lock_test.php	5.5 KB	-rw-r--r--
markdown_test.php	2.45 KB	-rw-r--r--
mathslib_test.php	11.12 KB	-rw-r--r--
medialib_test.php	20.19 KB	-rw-rw-r--
message_test.php	12.46 KB	-rw-rw-r--
messageinbound_test.php	5.89 KB	-rw-r--r--
messagelib_test.php	56.39 KB	-rw-rw-r--
minify_test.php	3.14 KB	-rw-r--r--
modinfolib_test.php	44.15 KB	-rw-rw-r--
moodle_page_test.php	29.58 KB	-rw-rw-r--
moodle_url_test.php	12.85 KB	-rw-r--r--
moodlelib_test.php	216.85 KB	-rw-rw-r--
mustache_template_finder_test....	7.4 KB	-rw-r--r--
mustache_template_source_loade...	18.06 KB	-rw-r--r--
myprofilelib_test.php	10.44 KB	-rw-r--r--
navigationlib_test.php	26.28 KB	-rw-rw-r--
notification_test.php	4.61 KB	-rw-r--r--
oauth2_test.php	17.57 KB	-rw-r--r--
output_mustache_helper_collect...	8.09 KB	-rw-r--r--
outputcomponents_test.php	29.67 KB	-rw-r--r--
outputfactories_test.php	6.8 KB	-rw-r--r--
outputrequirementslib_test.php	5.38 KB	-rw-r--r--
pdflib_test.php	1.51 KB	-rw-r--r--
persistent_test.php	19.95 KB	-rw-rw-r--
plugin_manager_test.php	27.39 KB	-rw-r--r--
portfoliolib_test.php	8.4 KB	-rw-r--r--
progress_display_test.php	3.75 KB	-rw-r--r--
progress_test.php	14.48 KB	-rw-r--r--
qrcode_test.php	1.88 KB	-rw-r--r--
questionlib_test.php	96.9 KB	-rw-rw-r--
regex_test.php	1.88 KB	-rw-r--r--
report_helper_test.php	3.68 KB	-rw-rw-r--
requirejs_test.php	3.73 KB	-rw-r--r--
rsslib_test.php	6.9 KB	-rw-r--r--
rtlcss_test.php	56.86 KB	-rw-r--r--
sample_questions.ser	141.76 KB	-rw-r--r--
sample_questions.xml	102.62 KB	-rw-r--r--
sample_questions_with_old_imag...	4.85 KB	-rw-r--r--
sample_questions_with_old_imag...	4.08 KB	-rw-r--r--
sample_questions_wrong.xml	102.57 KB	-rw-r--r--
scheduled_task_test.php	29.98 KB	-rw-rw-r--
scss_test.php	4.26 KB	-rw-r--r--
session_manager_test.php	33.96 KB	-rw-r--r--
session_redis_test.php	13.27 KB	-rw-r--r--
sessionlib_test.php	11.86 KB	-rw-r--r--
setuplib_test.php	19.63 KB	-rw-r--r--
statslib_test.php	26.75 KB	-rw-r--r--
string_manager_standard_test.p...	10.05 KB	-rw-rw-r--
tablelib_test.php	23.53 KB	-rw-r--r--
task_database_logger_test.php	20.15 KB	-rw-r--r--
task_logging_test.php	17.31 KB	-rw-r--r--
task_manager_test.php	11.2 KB	-rw-r--r--
task_running_test.php	6.58 KB	-rw-r--r--
text_test.php	21.09 KB	-rw-rw-r--
theme_config_test.php	9.81 KB	-rw-rw-r--
time_splittings_test.php	15.09 KB	-rw-r--r--
update_api_test.php	6.75 KB	-rw-r--r--
update_checker_test.php	10.86 KB	-rw-r--r--
update_code_manager_test.php	9.06 KB	-rw-r--r--
update_validator_test.php	18.44 KB	-rw-r--r--
upgrade_util_test.php	5.65 KB	-rw-r--r--
upgradelib_test.php	69.1 KB	-rw-rw-r--
user_menu_test.php	3.82 KB	-rw-rw-r--
user_test.php	32.36 KB	-rw-rw-r--
useragent_test.php	83.88 KB	-rw-rw-r--
weblib_format_text_test.php	12.11 KB	-rw-r--r--
weblib_test.php	35.1 KB	-rw-rw-r--
xhprof_test.php	3.32 KB	-rw-r--r--
xhtml_container_stack_test.php	4.16 KB	-rw-r--r--
xmlize_test.php	2.72 KB	-rw-r--r--

Code Editor : text_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/>.

/**
 * core_text unit tests.
 *
 * @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();

/**
 * Unit tests for our utf-8 aware text processing.
 *
 * @package    core
 * @category   phpunit
 * @copyright  2010 Petr Skoda (http://skodak.org)
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class core_text_testcase extends advanced_testcase {

/**
     * Tests the static parse charset method.
     */
    public function test_parse_charset() {
        $this->assertSame('windows-1250', core_text::parse_charset('Cp1250'));
        // Does typo3 work? Some encoding moodle does not use.
        $this->assertSame('windows-1252', core_text::parse_charset('ms-ansi'));
    }

/**
     * Tests the static convert method.
     */
    public function test_convert() {
        $utf8 = "Žluťoučký koníček";
        $iso2 = pack("H*", "ae6c75bb6f75e86bfd206b6f6eede8656b");
        $win  = pack("H*", "8e6c759d6f75e86bfd206b6f6eede8656b");
        $this->assertSame($iso2, core_text::convert($utf8, 'utf-8', 'iso-8859-2'));
        $this->assertSame($utf8, core_text::convert($iso2, 'iso-8859-2', 'utf-8'));
        $this->assertSame($win, core_text::convert($utf8, 'utf-8', 'win-1250'));
        $this->assertSame($utf8, core_text::convert($win, 'win-1250', 'utf-8'));
        $this->assertSame($iso2, core_text::convert($win, 'win-1250', 'iso-8859-2'));
        $this->assertSame($win, core_text::convert($iso2, 'iso-8859-2', 'win-1250'));
        $this->assertSame($iso2, core_text::convert($iso2, 'iso-8859-2', 'iso-8859-2'));
        $this->assertSame($win, core_text::convert($win, 'win-1250', 'cp1250'));
        $this->assertSame($utf8, core_text::convert($utf8, 'utf-8', 'utf-8'));

$utf8 = '言語設定';
        $str = pack("H*", "b8c0b8ecc0dfc4ea"); // EUC-JP
        $this->assertSame($str, core_text::convert($utf8, 'utf-8', 'EUC-JP'));
        $this->assertSame($utf8, core_text::convert($str, 'EUC-JP', 'utf-8'));
        $this->assertSame($utf8, core_text::convert($utf8, 'utf-8', 'utf-8'));

$str = pack("H*", "1b24423840386c405f446a1b2842"); // ISO-2022-JP
        $this->assertSame($str, core_text::convert($utf8, 'utf-8', 'ISO-2022-JP'));
        $this->assertSame($utf8, core_text::convert($str, 'ISO-2022-JP', 'utf-8'));
        $this->assertSame($utf8, core_text::convert($utf8, 'utf-8', 'utf-8'));

$str = pack("H*", "8cbe8cea90dd92e8"); // SHIFT-JIS
        $this->assertSame($str, core_text::convert($utf8, 'utf-8', 'SHIFT-JIS'));
        $this->assertSame($utf8, core_text::convert($str, 'SHIFT-JIS', 'utf-8'));
        $this->assertSame($utf8, core_text::convert($utf8, 'utf-8', 'utf-8'));

$utf8 = '简体中文';
        $str = pack("H*", "bcf2cce5d6d0cec4"); // GB2312
        $this->assertSame($str, core_text::convert($utf8, 'utf-8', 'GB2312'));
        $this->assertSame($utf8, core_text::convert($str, 'GB2312', 'utf-8'));
        $this->assertSame($utf8, core_text::convert($utf8, 'utf-8', 'utf-8'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB18030
        $this->assertSame($str, core_text::convert($utf8, 'utf-8', 'GB18030'));
        $this->assertSame($utf8, core_text::convert($str, 'GB18030', 'utf-8'));
        $this->assertSame($utf8, core_text::convert($utf8, 'utf-8', 'utf-8'));

$utf8 = "Žluťoučký koníček";
        $this->assertSame('Zlutoucky konicek', core_text::convert($utf8, 'utf-8', 'ascii'));
        $this->assertSame($utf8, core_text::convert($utf8.chr(130), 'utf-8', 'utf-8'));
        $utf8 = "Der eine stößt den Speer zum Mann";
        $this->assertSame('Der eine stoesst den Speer zum Mann', core_text::convert($utf8, 'utf-8', 'ascii'));
        $iso1 = core_text::convert($utf8, 'utf-8', 'iso-8859-1');
        $this->assertSame('Der eine stoesst den Speer zum Mann', core_text::convert($iso1, 'iso-8859-1', 'ascii'));
    }

/**
     * Tests the static sub string method.
     */
    public function test_substr() {
        $str = "Žluťoučký koníček";
        $this->assertSame($str, core_text::substr($str, 0));
        $this->assertSame('luťoučký koníček', core_text::substr($str, 1));
        $this->assertSame('luť', core_text::substr($str, 1, 3));
        $this->assertSame($str, core_text::substr($str, 0, 100));
        $this->assertSame('če', core_text::substr($str, -3, 2));

$iso2 = pack("H*", "ae6c75bb6f75e86bfd206b6f6eede8656b");
        $this->assertSame(core_text::convert('luť', 'utf-8', 'iso-8859-2'), core_text::substr($iso2, 1, 3, 'iso-8859-2'));
        $this->assertSame(core_text::convert($str, 'utf-8', 'iso-8859-2'), core_text::substr($iso2, 0, 100, 'iso-8859-2'));
        $this->assertSame(core_text::convert('če', 'utf-8', 'iso-8859-2'), core_text::substr($iso2, -3, 2, 'iso-8859-2'));

$win  = pack("H*", "8e6c759d6f75e86bfd206b6f6eede8656b");
        $this->assertSame(core_text::convert('luť', 'utf-8', 'cp1250'), core_text::substr($win, 1, 3, 'cp1250'));
        $this->assertSame(core_text::convert($str, 'utf-8', 'cp1250'), core_text::substr($win, 0, 100, 'cp1250'));
        $this->assertSame(core_text::convert('če', 'utf-8', 'cp1250'), core_text::substr($win, -3, 2, 'cp1250'));

$str = pack("H*", "b8c0b8ecc0dfc4ea"); // EUC-JP
        $s = pack("H*", "b8ec"); // EUC-JP
        $this->assertSame($s, core_text::substr($str, 1, 1, 'EUC-JP'));

$str = pack("H*", "1b24423840386c405f446a1b2842"); // ISO-2022-JP
        $s = pack("H*", "1b2442386c1b2842"); // ISO-2022-JP
        $this->assertSame($s, core_text::substr($str, 1, 1, 'ISO-2022-JP'));

$str = pack("H*", "8cbe8cea90dd92e8"); // SHIFT-JIS
        $s = pack("H*", "8cea"); // SHIFT-JIS
        $this->assertSame($s, core_text::substr($str, 1, 1, 'SHIFT-JIS'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB2312
        $s = pack("H*", "cce5"); // GB2312
        $this->assertSame($s, core_text::substr($str, 1, 1, 'GB2312'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB18030
        $s = pack("H*", "cce5"); // GB18030
        $this->assertSame($s, core_text::substr($str, 1, 1, 'GB18030'));
    }

/**
     * Tests the static string length method.
     */
    public function test_strlen() {
        $str = "Žluťoučký koníček";
        $this->assertSame(17, core_text::strlen($str));

$iso2 = pack("H*", "ae6c75bb6f75e86bfd206b6f6eede8656b");
        $this->assertSame(17, core_text::strlen($iso2, 'iso-8859-2'));

$win  = pack("H*", "8e6c759d6f75e86bfd206b6f6eede8656b");
        $this->assertSame(17, core_text::strlen($win, 'cp1250'));

$str = pack("H*", "b8ec"); // EUC-JP
        $this->assertSame(1, core_text::strlen($str, 'EUC-JP'));
        $str = pack("H*", "b8c0b8ecc0dfc4ea"); // EUC-JP
        $this->assertSame(4, core_text::strlen($str, 'EUC-JP'));

$str = pack("H*", "1b2442386c1b2842"); // ISO-2022-JP
        $this->assertSame(1, core_text::strlen($str, 'ISO-2022-JP'));
        $str = pack("H*", "1b24423840386c405f446a1b2842"); // ISO-2022-JP
        $this->assertSame(4, core_text::strlen($str, 'ISO-2022-JP'));

$str = pack("H*", "8cea"); // SHIFT-JIS
        $this->assertSame(1, core_text::strlen($str, 'SHIFT-JIS'));
        $str = pack("H*", "8cbe8cea90dd92e8"); // SHIFT-JIS
        $this->assertSame(4, core_text::strlen($str, 'SHIFT-JIS'));

$str = pack("H*", "cce5"); // GB2312
        $this->assertSame(1, core_text::strlen($str, 'GB2312'));
        $str = pack("H*", "bcf2cce5d6d0cec4"); // GB2312
        $this->assertSame(4, core_text::strlen($str, 'GB2312'));

$str = pack("H*", "cce5"); // GB18030
        $this->assertSame(1, core_text::strlen($str, 'GB18030'));
        $str = pack("H*", "bcf2cce5d6d0cec4"); // GB18030
        $this->assertSame(4, core_text::strlen($str, 'GB18030'));
    }

/**
     * Test unicode safe string truncation.
     */
    public function test_str_max_bytes() {
        // These are all 3 byte characters, so this is a 12-byte string.
        $str = '言語設定';

$this->assertEquals(12, strlen($str));

// Step back, shortening the string 1 byte at a time. Should remove in 1 char chunks.
        $conv = core_text::str_max_bytes($str, 12);
        $this->assertEquals(12, strlen($conv));
        $this->assertSame('言語設定', $conv);
        $conv = core_text::str_max_bytes($str, 11);
        $this->assertEquals(9, strlen($conv));
        $this->assertSame('言語設', $conv);
        $conv = core_text::str_max_bytes($str, 10);
        $this->assertEquals(9, strlen($conv));
        $this->assertSame('言語設', $conv);
        $conv = core_text::str_max_bytes($str, 9);
        $this->assertEquals(9, strlen($conv));
        $this->assertSame('言語設', $conv);
        $conv = core_text::str_max_bytes($str, 8);
        $this->assertEquals(6, strlen($conv));
        $this->assertSame('言語', $conv);

// Now try a mixed byte string.
        $str = '言語設a定';

$this->assertEquals(13, strlen($str));

$conv = core_text::str_max_bytes($str, 11);
        $this->assertEquals(10, strlen($conv));
        $this->assertSame('言語設a', $conv);
        $conv = core_text::str_max_bytes($str, 10);
        $this->assertEquals(10, strlen($conv));
        $this->assertSame('言語設a', $conv);
        $conv = core_text::str_max_bytes($str, 9);
        $this->assertEquals(9, strlen($conv));
        $this->assertSame('言語設', $conv);
        $conv = core_text::str_max_bytes($str, 8);
        $this->assertEquals(6, strlen($conv));
        $this->assertSame('言語', $conv);

// Test 0 byte case.
        $conv = core_text::str_max_bytes($str, 0);
        $this->assertEquals(0, strlen($conv));
        $this->assertSame('', $conv);
    }

/**
     * Tests the static strtolower method.
     */
    public function test_strtolower() {
        $str = "Žluťoučký koníček";
        $low = 'žluťoučký koníček';
        $this->assertSame($low, core_text::strtolower($str));

$iso2 = pack("H*", "ae6c75bb6f75e86bfd206b6f6eede8656b");
        $this->assertSame(core_text::convert($low, 'utf-8', 'iso-8859-2'), core_text::strtolower($iso2, 'iso-8859-2'));

$win  = pack("H*", "8e6c759d6f75e86bfd206b6f6eede8656b");
        $this->assertSame(core_text::convert($low, 'utf-8', 'cp1250'), core_text::strtolower($win, 'cp1250'));

$str = '言語設定';
        $this->assertSame($str, core_text::strtolower($str));

$str = '简体中文';
        $this->assertSame($str, core_text::strtolower($str));

$str = pack("H*", "1b24423840386c405f446a1b2842"); // ISO-2022-JP
        $this->assertSame($str, core_text::strtolower($str, 'ISO-2022-JP'));

$str = pack("H*", "8cbe8cea90dd92e8"); // SHIFT-JIS
        $this->assertSame($str, core_text::strtolower($str, 'SHIFT-JIS'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB2312
        $this->assertSame($str, core_text::strtolower($str, 'GB2312'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB18030
        $this->assertSame($str, core_text::strtolower($str, 'GB18030'));

// Typo3 has problems with integers.
        $str = 1309528800;
        $this->assertSame((string)$str, core_text::strtolower($str));
    }

/**
     * Tests the static strtoupper.
     */
    public function test_strtoupper() {
        $str = "Žluťoučký koníček";
        $up  = 'ŽLUŤOUČKÝ KONÍČEK';
        $this->assertSame($up, core_text::strtoupper($str));

$iso2 = pack("H*", "ae6c75bb6f75e86bfd206b6f6eede8656b");
        $this->assertSame(core_text::convert($up, 'utf-8', 'iso-8859-2'), core_text::strtoupper($iso2, 'iso-8859-2'));

$win  = pack("H*", "8e6c759d6f75e86bfd206b6f6eede8656b");
        $this->assertSame(core_text::convert($up, 'utf-8', 'cp1250'), core_text::strtoupper($win, 'cp1250'));

$str = '言語設定';
        $this->assertSame($str, core_text::strtoupper($str));

$str = '简体中文';
        $this->assertSame($str, core_text::strtoupper($str));

$str = pack("H*", "1b24423840386c405f446a1b2842"); // ISO-2022-JP
        $this->assertSame($str, core_text::strtoupper($str, 'ISO-2022-JP'));

$str = pack("H*", "8cbe8cea90dd92e8"); // SHIFT-JIS
        $this->assertSame($str, core_text::strtoupper($str, 'SHIFT-JIS'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB2312
        $this->assertSame($str, core_text::strtoupper($str, 'GB2312'));

$str = pack("H*", "bcf2cce5d6d0cec4"); // GB18030
        $this->assertSame($str, core_text::strtoupper($str, 'GB18030'));
    }

/**
     * Test the strrev method.
     */
    public function test_strrev() {
        $strings = array(
            "Žluťoučký koníček" => "kečínok ýkčuoťulŽ",
            'ŽLUŤOUČKÝ KONÍČEK' => "KEČÍNOK ÝKČUOŤULŽ",
            '言語設定' => '定設語言',
            '简体中文' => '文中体简',
            "Der eine stößt den Speer zum Mann" => "nnaM muz reepS ned tßöts enie reD"
        );
        foreach ($strings as $before => $after) {
            // Make sure we can reverse it both ways and that it comes out the same.
            $this->assertSame($after, core_text::strrev($before));
            $this->assertSame($before, core_text::strrev($after));
            // Reverse it twice to be doubly sure.
            $this->assertSame($after, core_text::strrev(core_text::strrev($after)));
        }
    }

/**
     * Tests the static strpos method.
     */
    public function test_strpos() {
        $str = "Žluťoučký koníček";
        $this->assertSame(10, core_text::strpos($str, 'koníč'));
    }

/**
     * Tests the static strrpos.
     */
    public function test_strrpos() {
        $str = "Žluťoučký koníček";
        $this->assertSame(11, core_text::strrpos($str, 'o'));
    }

/**
     * Tests the static specialtoascii method.
     */
    public function test_specialtoascii() {
        $str = "Žluťoučký koníček";
        $this->assertSame('Zlutoucky konicek', core_text::specialtoascii($str));
    }

/**
     * Tests the static encode_mimeheader method.
     * This also tests method moodle_phpmailer::encodeHeader that calls core_text::encode_mimeheader
     */
    public function test_encode_mimeheader() {
        global $CFG;
        require_once($CFG->libdir.'/phpmailer/moodle_phpmailer.php');
        $mailer = new moodle_phpmailer();

// Encode short string with non-latin characters.
        $str = "Žluťoučký koníček";
        $encodedstr = '=?utf-8?B?xb1sdcWlb3XEjWvDvSBrb27DrcSNZWs=?=';
        $this->assertSame($encodedstr, core_text::encode_mimeheader($str));
        $this->assertSame($encodedstr, $mailer->encodeHeader($str));
        $this->assertSame('"' . $encodedstr . '"', $mailer->encodeHeader($str, 'phrase'));

// Encode short string without non-latin characters. Make sure the quotes are escaped in quoted email headers.
        $latinstr = 'text"with quotes';
        $this->assertSame($latinstr, core_text::encode_mimeheader($latinstr));
        $this->assertSame($latinstr, $mailer->encodeHeader($latinstr));
        $this->assertSame('"text\\"with quotes"', $mailer->encodeHeader($latinstr, 'phrase'));

// Encode long string without non-latin characters.
        $longlatinstr = 'This is a very long text that still should not be split into several lines in the email headers because '.
            'it does not have any non-latin characters. The "quotes" and \\backslashes should be escaped only if it\'s a part of email address';
        $this->assertSame($longlatinstr, core_text::encode_mimeheader($longlatinstr));
        $this->assertSame($longlatinstr, $mailer->encodeHeader($longlatinstr));
        $longlatinstrwithslash = preg_replace(['/\\\\/', "/\"/"], ['\\\\\\', '\\"'], $longlatinstr);
        $this->assertSame('"' . $longlatinstrwithslash . '"', $mailer->encodeHeader($longlatinstr, 'phrase'));

// Encode long string with non-latin characters.
        $longstr = "Неопознанная ошибка в файле C:\\tmp\\: \"Не пользуйтесь виндоуз\"";
        $encodedlongstr = "=?utf-8?B?0J3QtdC+0L/QvtC30L3QsNC90L3QsNGPINC+0YjQuNCx0LrQsCDQsiDRhNCw?=
 =?utf-8?B?0LnQu9C1IEM6XHRtcFw6ICLQndC1INC/0L7Qu9GM0LfRg9C50YLQtdGB?=
 =?utf-8?B?0Ywg0LLQuNC90LTQvtGD0Lci?=";
        $this->assertSame($encodedlongstr, $mailer->encodeHeader($longstr));
        $this->assertSame('"' . $encodedlongstr . '"', $mailer->encodeHeader($longstr, 'phrase'));
    }

/**
     * Tests the static entities_to_utf8 method.
     */
    public function test_entities_to_utf8() {
        $str = "&#x17d;lu&#x165;ou&#x10d;k&#xfd; kon&iacute;&#269;ek&copy;&quot;&amp;&lt;&gt;&sect;&laquo;";
        $this->assertSame("Žluťoučký koníček©\"&<>§«", core_text::entities_to_utf8($str));
    }

/**
     * Tests the static utf8_to_entities method.
     */
    public function test_utf8_to_entities() {
        $str = "&#x17d;luťoučký kon&iacute;ček&copy;&quot;&amp;&lt;&gt;&sect;&laquo;";
        $this->assertSame("&#x17d;lu&#x165;ou&#x10d;k&#xfd; kon&iacute;&#x10d;ek&copy;&quot;&amp;&lt;&gt;&sect;&laquo;", core_text::utf8_to_entities($str));
        $this->assertSame("&#381;lu&#357;ou&#269;k&#253; kon&iacute;&#269;ek&copy;&quot;&amp;&lt;&gt;&sect;&laquo;", core_text::utf8_to_entities($str, true));

$str = "&#381;luťoučký kon&iacute;ček&copy;&quot;&amp;&lt;&gt;&sect;&laquo;";
        $this->assertSame("&#x17d;lu&#x165;ou&#x10d;k&#xfd; kon&#xed;&#x10d;ek&#xa9;\"&<>&#xa7;&#xab;", core_text::utf8_to_entities($str, false, true));
        $this->assertSame("&#381;lu&#357;ou&#269;k&#253; kon&#237;&#269;ek&#169;\"&<>&#167;&#171;", core_text::utf8_to_entities($str, true, true));
    }

/**
     * Tests the static trim_utf8_bom method.
     */
    public function test_trim_utf8_bom() {
        $bom = "\xef\xbb\xbf";
        $str = "Žluťoučký koníček";
        $this->assertSame($str.$bom, core_text::trim_utf8_bom($bom.$str.$bom));
    }

/**
     * Tests the static remove_unicode_non_characters method.
     */
    public function test_remove_unicode_non_characters() {
        // Confirm that texts which don't contain these characters are unchanged.
        $this->assertSame('Frogs!', core_text::remove_unicode_non_characters('Frogs!'));

// Even if they contain some very scary characters.
        $example = html_entity_decode('A&#xfffd;&#x1d15f;B');
        $this->assertSame($example, core_text::remove_unicode_non_characters($example));

// Non-characters are removed wherever they may be, with other characters left.
        $example = html_entity_decode('&#xfffe;A&#xffff;B&#x8fffe;C&#xfdd0;D&#xfffd;E&#xfdd5;');
        $expected = html_entity_decode('ABCD&#xfffd;E');
        $this->assertSame($expected, core_text::remove_unicode_non_characters($example));

// If you only have a non-character, you get empty string.
        $example = html_entity_decode('&#xfffe;');
        $this->assertSame('', core_text::remove_unicode_non_characters($example));
    }

/**
     * Tests the static get_encodings method.
     */
    public function test_get_encodings() {
        $encodings = core_text::get_encodings();
        $this->assertTrue(is_array($encodings));
        $this->assertTrue(count($encodings) > 1);
        $this->assertTrue(isset($encodings['UTF-8']));
    }

/**
     * Tests the static code2utf8 method.
     */
    public function test_code2utf8() {
        $this->assertSame('Ž', core_text::code2utf8(381));
    }

/**
     * Tests the static utf8ord method.
     */
    public function test_utf8ord() {
        $this->assertSame(ord(''), core_text::utf8ord(''));
        $this->assertSame(ord('f'), core_text::utf8ord('f'));
        $this->assertSame(0x03B1, core_text::utf8ord('α'));
        $this->assertSame(0x0439, core_text::utf8ord('й'));
        $this->assertSame(0x2FA1F, core_text::utf8ord('𯨟'));
        $this->assertSame(381, core_text::utf8ord('Ž'));
    }

/**
     * Tests the static strtotitle method.
     */
    public function test_strtotitle() {
        $str = "žluťoučký koníček";
        $this->assertSame("Žluťoučký Koníček", core_text::strtotitle($str));
    }

/**
     * Test strrchr.
     */
    public function test_strrchr() {
        $str = "Žluťoučký koníček";
        $this->assertSame('koníček', core_text::strrchr($str, 'koní'));
        $this->assertSame('Žluťoučký ', core_text::strrchr($str, 'koní', true));
        $this->assertFalse(core_text::strrchr($str, 'A'));
        $this->assertFalse(core_text::strrchr($str, 'ç', true));
    }
}

${this.title}

Code Editor : text_test.php