Proyectos de Subversion Moodle

<?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/>.

/**

 * Tests core_date class.

 *

 * @package   core

 * @copyright 2015 Totara Learning Solutions Ltd {@link http://www.totaralms.com/}

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 * @author    Petr Skoda <petr.skoda@totaralms.com>

 */

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

/**

 * Tests core_date class.

 *

 * @package   core

 * @copyright 2015 Totara Learning Solutions Ltd {@link http://www.totaralms.com/}

 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

 * @author    Petr Skoda <petr.skoda@totaralms.com>

 * @covers \core_date

 * @coversDefaultClass \core_date

 */

final class date_test extends advanced_testcase {

    /**

     * @covers ::get_default_php_timezone

     */

    public function test_get_default_php_timezone(): void {

        $this->resetAfterTest();

        $origtz = core_date::get_default_php_timezone();

        $this->assertNotEmpty($origtz);

        $this->setTimezone('Pacific/Auckland', 'Europe/Prague');

        $this->assertSame('Europe/Prague', core_date::get_default_php_timezone());

        $this->setTimezone('Pacific/Auckland', 'UTC');

        $this->assertSame('UTC', core_date::get_default_php_timezone());

        $this->setTimezone('Pacific/Auckland', 'GMT');

        $this->assertSame('GMT', core_date::get_default_php_timezone());

    }

    /**

     * @covers ::normalise_timezone

     */

    public function test_normalise_timezone(): void {

        $this->resetAfterTest();

        $this->setTimezone('Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone('Pacific/Auckland'));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone('99'));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone(99));

        $this->assertSame('GMT', core_date::normalise_timezone('GMT'));

        $this->assertSame('UTC', core_date::normalise_timezone('UTC'));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone('xxxxxxxx'));

        $this->assertSame('Europe/Berlin', core_date::normalise_timezone('Central European Time'));

        $this->assertSame('Etc/GMT', core_date::normalise_timezone('0'));

        $this->assertSame('Etc/GMT', core_date::normalise_timezone('0.0'));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone(2));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone('2.0'));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone(-2));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone('-2.0'));

        $this->assertSame('Etc/GMT+4', core_date::normalise_timezone(-4));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone('UTC+2'));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone('UTC-2'));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone('GMT+2'));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone('GMT-2'));

        $this->assertSame('Etc/GMT+12', core_date::normalise_timezone(-12));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone(-13));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone(-14));

        $this->assertSame('Etc/GMT-12', core_date::normalise_timezone(12));

        $this->assertSame('Etc/GMT-13', core_date::normalise_timezone(13));

        $this->assertSame('Etc/GMT-14', core_date::normalise_timezone(14));

        $this->assertSame('Asia/Kabul', core_date::normalise_timezone(4.5));

        $this->assertSame('Asia/Kolkata', core_date::normalise_timezone(5.5));

        $this->assertSame('Asia/Rangoon', core_date::normalise_timezone(6.5));

        $this->assertSame('Australia/Darwin', core_date::normalise_timezone('9.5'));

        $this->setTimezone('99', 'Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone('Pacific/Auckland'));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone('99'));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone(99));

        $this->assertSame('GMT', core_date::normalise_timezone('GMT'));

        $this->assertSame('UTC', core_date::normalise_timezone('UTC'));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone('xxxxxxxx'));

        $this->assertSame('Europe/Berlin', core_date::normalise_timezone('Central European Time'));

        $this->assertSame('Etc/GMT', core_date::normalise_timezone('0'));

        $this->assertSame('Etc/GMT', core_date::normalise_timezone('0.0'));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone(2));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone('2.0'));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone(-2));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone('-2.0'));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone('UTC+2'));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone('UTC-2'));

        $this->assertSame('Etc/GMT-2', core_date::normalise_timezone('GMT+2'));

        $this->assertSame('Etc/GMT+2', core_date::normalise_timezone('GMT-2'));

        $this->assertSame('Etc/GMT+12', core_date::normalise_timezone(-12));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone(-13));

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone(-14));

        $this->assertSame('Etc/GMT-12', core_date::normalise_timezone(12));

        $this->assertSame('Etc/GMT-13', core_date::normalise_timezone(13));

        $this->assertSame('Etc/GMT-14', core_date::normalise_timezone(14));

        $this->setTimezone('Pacific/Auckland', 'Pacific/Auckland');

        $tz = new DateTimeZone('Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', core_date::normalise_timezone($tz));

    }

    /**

     * @covers ::normalise_timezone

     */

    public function test_windows_conversion(): void {

        $file = self::get_fixture_path('core', 'timezonewindows.xml');

        $contents = file_get_contents($file);

        preg_match_all('/<mapZone other="([^"]+)" territory="001" type="([^"]+)"\/>/', $contents, $matches, PREG_SET_ORDER);

        $this->assertCount(104, $matches); // NOTE: If the file contents change edit the core_date class and update this.

        foreach ($matches as $match) {

            $result = core_date::normalise_timezone($match[1]);

            if ($result == $match[2]) {

                $this->assertSame($match[2], $result);

            } else {

                $data = new DateTime('now', new DateTimeZone($match[2]));

                $expectedoffset = $data->getOffset();

                $data = new DateTime('now', new DateTimeZone($result));

                $resultoffset = $data->getOffset();

                $this->assertSame($expectedoffset, $resultoffset, "$match[1] is expected to be converted to $match[2] not $result");

            }

        }

    }

    /**

     * Sanity test for PHP stuff.

     */

    public function test_php_gmt_offsets(): void {

        $this->resetAfterTest();

        $this->setTimezone('Pacific/Auckland', 'Pacific/Auckland');

        for ($i = -12; $i < 0; $i++) {

            $date = new DateTime('now', new DateTimeZone("Etc/GMT{$i}"));

            $this->assertSame(- $i * 60 * 60, $date->getOffset());

            $date = new DateTime('now', new DateTimeZone(core_date::normalise_timezone("GMT{$i}")));

            $this->assertSame($i * 60 * 60, $date->getOffset());

            $date = new DateTime('now', new DateTimeZone(core_date::normalise_timezone("UTC{$i}")));

            $this->assertSame($i * 60 * 60, $date->getOffset());

        }

        $date = new DateTime('now', new DateTimeZone('Etc/GMT'));

        $this->assertSame(0, $date->getOffset());

        for ($i = 1; $i <= 12; $i++) {

            $date = new DateTime('now', new DateTimeZone("Etc/GMT+{$i}"));

            $this->assertSame(- $i * 60 * 60, $date->getOffset());

            $date = new DateTime('now', new DateTimeZone(core_date::normalise_timezone("GMT+{$i}")));

            $this->assertSame($i * 60 * 60, $date->getOffset());

            $date = new DateTime('now', new DateTimeZone(core_date::normalise_timezone("UTC+{$i}")));

            $this->assertSame($i * 60 * 60, $date->getOffset());

        }

    }

    /**

     * We are only checking lang strings existence here, not code.

     *

     * @coversNothing

     */

    public function test_timezone_all_lang_strings(): void {

        // We only run this test when PHPUNIT_LONGTEST is enabled, test_get_localised_timezone()

        // is already checking the names of a few, hopefully stable enough to be run always.

        if (!PHPUNIT_LONGTEST) {

            $this->markTestSkipped('PHPUNIT_LONGTEST is not defined');

        }

        $phpzones = DateTimeZone::listIdentifiers();

        $manager = get_string_manager();

        foreach ($phpzones as $tz) {

            $this->assertTrue($manager->string_exists(strtolower($tz), 'core_timezones'),

                    'String for timezone ' . strtolower($tz) . ' not found.');

        }

    }

    /**

     * @covers ::get_localised_timezone

     */

    public function test_get_localised_timezone(): void {

        $this->resetAfterTest();

        $this->setTimezone('Pacific/Auckland', 'Pacific/Auckland');

        $result = core_date::get_localised_timezone('Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', $result);

        $result = core_date::get_localised_timezone('Europe/Madrid');

        $this->assertSame('Europe/Madrid', $result);

        $result = core_date::get_localised_timezone('America/New_York');

        $this->assertSame('America/New_York', $result);

        $result = core_date::get_localised_timezone('99');

        $this->assertSame('Server timezone (Pacific/Auckland)', $result);

        $result = core_date::get_localised_timezone(99);

        $this->assertSame('Server timezone (Pacific/Auckland)', $result);

        $result = core_date::get_localised_timezone('Etc/GMT-1');

        $this->assertSame('UTC+1', $result);

        $result = core_date::get_localised_timezone('Etc/GMT+2');

        $this->assertSame('UTC-2', $result);

        $result = core_date::get_localised_timezone('GMT');

        $this->assertSame('UTC', $result);

        $result = core_date::get_localised_timezone('Etc/GMT');

        $this->assertSame('UTC', $result);

    }

    /**

     * @covers ::get_list_of_timezones

     */

    public function test_get_list_of_timezones(): void {

        $this->resetAfterTest();

        $this->setTimezone('Pacific/Auckland', 'Pacific/Auckland');

        $phpzones = DateTimeZone::listIdentifiers();

        $zones = core_date::get_list_of_timezones();

        $this->assertSame(count($phpzones), count($zones));

        foreach ($zones as $zone => $zonename) {

            $this->assertSame($zone, $zonename); // The same in English!

            $this->assertContains($zone, $phpzones); // No extras expected.

        }

        $this->assertSame($zones, core_date::get_list_of_timezones(null, false));

        $nnzones = core_date::get_list_of_timezones(null, true);

        $last = $nnzones['99'];

        $this->assertSame('Server timezone (Pacific/Auckland)', $last);

        unset($nnzones['99']);

        $this->assertSame($zones, $nnzones);

        $nnzones = core_date::get_list_of_timezones('99', false);

        $last = $nnzones['99'];

        $this->assertSame('Server timezone (Pacific/Auckland)', $last);

        unset($nnzones['99']);

        $this->assertSame($zones, $nnzones);

        $xxzones = core_date::get_list_of_timezones('xx', false);

        $xx = $xxzones['xx'];

        $this->assertSame('Invalid timezone "xx"', $xx);

        unset($xxzones['xx']);

        $this->assertSame($zones, $xxzones);

        $xxzones = core_date::get_list_of_timezones('1', false);

        $xx = $xxzones['1'];

        $this->assertSame('Invalid timezone "UTC+1.0"', $xx);

        unset($xxzones['1']);

        $this->assertSame($zones, $xxzones);

        $xxzones = core_date::get_list_of_timezones('-1.5', false);

        $xx = $xxzones['-1.5'];

        $this->assertSame('Invalid timezone "UTC-1.5"', $xx);

        unset($xxzones['-1.5']);

        $this->assertSame($zones, $xxzones);

    }

    /**

     * @covers ::get_server_timezone

     */

    public function test_get_server_timezone(): void {

        global $CFG;

        $this->resetAfterTest();

        $this->setTimezone('Pacific/Auckland', 'Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', core_date::get_server_timezone());

        $this->setTimezone('Pacific/Auckland', 'Europe/Prague');

        $this->assertSame('Pacific/Auckland', core_date::get_server_timezone());

        $this->setTimezone('99', 'Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', core_date::get_server_timezone());

        $this->setTimezone(99, 'Pacific/Auckland');

        $this->assertSame('Pacific/Auckland', core_date::get_server_timezone());

        $this->setTimezone('Pacific/Auckland', 'Pacific/Auckland');

        unset($CFG->timezone);

        $this->assertSame('Pacific/Auckland', core_date::get_server_timezone());

        // Admin should fix the settings.

        set_error_handler(function ($errno, $errstr): void {

            $this->assertStringContainsString('Unknown or bad timezone', $errstr);

            restore_error_handler();

        }, E_ALL);

        $this->setTimezone('xxx/zzzz', 'Europe/Prague');

        set_error_handler(function ($errno, $errstr): void {

            $this->assertStringContainsString('Unknown or bad timezone', $errstr);

            restore_error_handler();

        }, E_ALL);

        $this->assertSame('Europe/Prague', core_date::get_server_timezone());

    }

    /**

     * @covers ::get_server_timezone_object

     */

    public function test_get_server_timezone_object(): void {

        $this->resetAfterTest();

        $zones = core_date::get_list_of_timezones();

        foreach ($zones as $zone) {

            $this->setTimezone($zone, 'Pacific/Auckland');

            $tz = core_date::get_server_timezone_object();

            $this->assertInstanceOf('DateTimeZone', $tz);

            $this->assertSame($zone, $tz->getName());

        }

    }

    /**

     * @covers ::set_default_server_timezone

     */

    public function test_set_default_server_timezone(): void {

        global $CFG;

        $this->resetAfterTest();

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        unset($CFG->timezone);

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Pacific/Auckland', date_default_timezone_get());

        $this->setTimezone('', 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Pacific/Auckland', date_default_timezone_get());

        $this->setTimezone('99', 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Pacific/Auckland', date_default_timezone_get());

        $this->setTimezone(99, 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Pacific/Auckland', date_default_timezone_get());

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        $CFG->timezone = 'UTC';

        core_date::set_default_server_timezone();

        $this->assertSame('UTC', date_default_timezone_get());

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        $CFG->timezone = 'Australia/Perth';

        core_date::set_default_server_timezone();

        $this->assertSame('Australia/Perth', date_default_timezone_get());

        $this->setTimezone('0', 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Etc/GMT', date_default_timezone_get());

        $this->setTimezone('1', 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Etc/GMT-1', date_default_timezone_get());

        $this->setTimezone(1, 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Etc/GMT-1', date_default_timezone_get());

        $this->setTimezone('1.0', 'Pacific/Auckland');

        date_default_timezone_set('UTC');

        core_date::set_default_server_timezone();

        $this->assertSame('Etc/GMT-1', date_default_timezone_get());

    }

    public static function legacyUserTimezoneProvider(): array {

        return [

            ['', 'Australia/Perth'],            // Fallback on default timezone.

            ['-13.0', 'Australia/Perth'],       // Fallback on default timezone.

            ['-12.5', 'Etc/GMT+12'],

            ['-12.0', 'Etc/GMT+12'],

            ['-11.5', 'Etc/GMT+11'],

            ['-11.0', 'Etc/GMT+11'],

            ['-10.5', 'Etc/GMT+10'],

            ['-10.0', 'Etc/GMT+10'],

            ['-9.5', 'Etc/GMT+9'],

            ['-9.0', 'Etc/GMT+9'],

            ['-8.5', 'Etc/GMT+8'],

            ['-8.0', 'Etc/GMT+8'],

            ['-7.5', 'Etc/GMT+7'],

            ['-7.0', 'Etc/GMT+7'],

            ['-6.5', 'Etc/GMT+6'],

            ['-6.0', 'Etc/GMT+6'],

            ['-5.5', 'Etc/GMT+5'],

            ['-5.0', 'Etc/GMT+5'],

            ['-4.5', 'Etc/GMT+4'],

            ['-4.0', 'Etc/GMT+4'],

            ['-3.5', 'Etc/GMT+3'],

            ['-3.0', 'Etc/GMT+3'],

            ['-2.5', 'Etc/GMT+2'],

            ['-2.0', 'Etc/GMT+2'],

            ['-1.5', 'Etc/GMT+1'],

            ['-1.0', 'Etc/GMT+1'],

            ['-0.5', 'Etc/GMT'],

            ['0', 'Etc/GMT'],

            ['0.0', 'Etc/GMT'],

            ['0.5', 'Etc/GMT'],

            ['1.0', 'Etc/GMT-1'],

            ['1.5', 'Etc/GMT-1'],

            ['2.0', 'Etc/GMT-2'],

            ['2.5', 'Etc/GMT-2'],

            ['3.0', 'Etc/GMT-3'],

            ['3.5', 'Etc/GMT-3'],

            ['4.0', 'Etc/GMT-4'],

            ['4.5', 'Asia/Kabul'],

            ['5.0', 'Etc/GMT-5'],

            ['5.5', 'Asia/Kolkata'],

            ['6.0', 'Etc/GMT-6'],

            ['6.5', 'Asia/Rangoon'],

            ['7.0', 'Etc/GMT-7'],

            ['7.5', 'Etc/GMT-7'],

            ['8.0', 'Etc/GMT-8'],

            ['8.5', 'Etc/GMT-8'],

            ['9.0', 'Etc/GMT-9'],

            ['9.5', 'Australia/Darwin'],

            ['10.0', 'Etc/GMT-10'],

            ['10.5', 'Etc/GMT-10'],

            ['11.0', 'Etc/GMT-11'],

            ['11.5', 'Etc/GMT-11'],

            ['12.0', 'Etc/GMT-12'],

            ['12.5', 'Etc/GMT-12'],

            ['13.0', 'Etc/GMT-13'],

        ];

    }

    /**

     * @dataProvider legacyUserTimezoneProvider

     * @covers ::get_user_timezone

     * @param string $tz The legacy timezone.

     * @param string $expected The expected converted timezone.

     */

    public function test_get_legacy_user_timezone($tz, $expected): void {

        $this->setTimezone('Australia/Perth', 'Australia/Perth');

        $this->assertEquals($expected, core_date::get_user_timezone($tz));

    }

    /**

     * @covers ::get_user_timezone

     */

    public function test_get_user_timezone(): void {

        global $CFG, $USER;

        $this->resetAfterTest();

        // Null parameter.

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = '99';

        $this->assertSame('Pacific/Auckland', core_date::get_user_timezone(null));

        $this->assertSame('Pacific/Auckland', core_date::get_user_timezone());

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = 'Europe/Berlin';

        $this->assertSame('Europe/Berlin', core_date::get_user_timezone(null));

        $this->assertSame('Europe/Berlin', core_date::get_user_timezone());

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = 'xxx/yyy';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone(null));

        $this->assertSame('Europe/Prague', core_date::get_user_timezone());

        $this->setTimezone('Europe/Prague', 'Pacific/Auckland');

        $USER->timezone = 'abc/def';

        $CFG->forcetimezone = '99';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone(null));

        $this->assertSame('Europe/Prague', core_date::get_user_timezone());

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->setTimezone('xxx/yyy', 'Europe/London');

        $this->assertCount(1, $invokable->get_invocations());

        $USER->timezone = 'abc/def';

        $CFG->forcetimezone = 'Europe/Berlin';

        $this->assertSame('Europe/Berlin', core_date::get_user_timezone(null));

        $this->assertSame('Europe/Berlin', core_date::get_user_timezone());

        $this->assertCount(1, $invokable->get_invocations());

        restore_error_handler();

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->setTimezone('xxx/yyy', 'Europe/London');

        $this->assertCount(1, $invokable->get_invocations());

        restore_error_handler();

        $USER->timezone = 'abc/def';

        $CFG->forcetimezone = 99;

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->assertSame('Europe/London', core_date::get_user_timezone(null));

        $this->assertCount(1, $invokable->get_invocations());

        restore_error_handler();

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->assertSame('Europe/London', core_date::get_user_timezone());

        $this->assertCount(1, $invokable->get_invocations());

        restore_error_handler();

        // User object parameter.

        $admin = get_admin();

        $this->setTimezone('Europe/London');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = '99';

        $admin->timezone = 'Australia/Perth';

        $this->assertSame('Australia/Perth', core_date::get_user_timezone($admin));

        $this->setTimezone('Europe/Prague');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = '99';

        $admin->timezone = '99';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone($admin));

        $this->setTimezone('99', 'Europe/London');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = '99';

        $admin->timezone = '99';

        $this->assertSame('Europe/London', core_date::get_user_timezone($admin));

        $this->setTimezone('Europe/Prague');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = '99';

        $admin->timezone = 'xx/zz';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone($admin));

        $this->setTimezone('Europe/Prague');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = '99';

        unset($admin->timezone);

        $this->assertSame('Europe/Prague', core_date::get_user_timezone($admin));

        $this->setTimezone('Europe/Prague');

        $USER->timezone = 'Pacific/Auckland';

        $CFG->forcetimezone = 'Europe/Berlin';

        $admin->timezone = 'Australia/Perth';

        $this->assertSame('Europe/Berlin', core_date::get_user_timezone($admin));

        // Other scalar parameter.

        $this->setTimezone('Europe/Prague');

        $CFG->forcetimezone = '99';

        $USER->timezone = 'Pacific/Auckland';

        $this->assertSame('Pacific/Auckland', core_date::get_user_timezone('99'));

        $this->assertSame('Etc/GMT-1', core_date::get_user_timezone('1'));

        $this->assertSame('Etc/GMT+1', core_date::get_user_timezone(-1));

        $this->assertSame('Europe/London', core_date::get_user_timezone('Europe/London'));

        $USER->timezone = '99';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('99'));

        $this->assertSame('Europe/London', core_date::get_user_timezone('Europe/London'));

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('xxx/zzz'));

        $USER->timezone = 'xxz/zzz';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('99'));

        $this->setTimezone('99', 'Europe/Prague');

        $CFG->forcetimezone = '99';

        $USER->timezone = 'Pacific/Auckland';

        $this->assertSame('Pacific/Auckland', core_date::get_user_timezone('99'));

        $this->assertSame('Europe/London', core_date::get_user_timezone('Europe/London'));

        $USER->timezone = '99';

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('99'));

        $this->assertSame('Europe/London', core_date::get_user_timezone('Europe/London'));

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('xxx/zzz'));

        $USER->timezone = 99;

        $this->assertSame('Europe/London', core_date::get_user_timezone('Europe/London'));

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('xxx/zzz'));

        $USER->timezone = 'xxz/zzz';

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('99'));

        $this->assertCount(0, $invokable->get_invocations());

        restore_error_handler();

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->setTimezone('xxx', 'Europe/Prague');

        $this->assertCount(1, $invokable->get_invocations());

        restore_error_handler();

        $CFG->forcetimezone = '99';

        $USER->timezone = 'xxx';

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->assertSame('Europe/Prague', core_date::get_user_timezone('99'));

        $this->assertCount(1, $invokable->get_invocations());

        $this->assertSame('Europe/Prague', core_date::get_user_timezone(99));

        $this->assertCount(2, $invokable->get_invocations());

        $this->assertSame('Etc/GMT-1', core_date::get_user_timezone(1));

        $this->assertCount(2, $invokable->get_invocations());

        restore_error_handler();

        $this->setTimezone('Europe/Prague');

        $CFG->forcetimezone = 'Pacific/Auckland';

        $USER->timezone = 'Europe/London';

        $this->assertSame('Pacific/Auckland', core_date::get_user_timezone(99));

        $this->assertSame('Europe/Berlin', core_date::get_user_timezone('Europe/Berlin'));

        // TZ object param.

        $this->setTimezone('UTC');

        $USER->timezone = 'Europe/London';

        $CFG->forcetimezone = 99;

        $tz = new DateTimeZone('Pacific/Auckland');

        $invokable = self::get_invokable();

        set_error_handler($invokable, E_ALL);

        $this->assertSame('Pacific/Auckland', core_date::get_user_timezone($tz));

        $this->assertCount(0, $invokable->get_invocations());

        restore_error_handler();

    }

    /**

     * @covers ::get_user_timezone_object

     */

    public function test_get_user_timezone_object(): void {

        global $CFG, $USER;

        $this->resetAfterTest();

        $this->setTimezone('Pacific/Auckland');

        $CFG->forcetimezone = '99';

        $zones = core_date::get_list_of_timezones();

        foreach ($zones as $zone) {

            $USER->timezone = $zone;

            $tz = core_date::get_user_timezone_object();

            $this->assertInstanceOf('DateTimeZone', $tz);

            $this->assertSame($zone, $tz->getName());

        }

    }

    /**

     * Data provider for the values for test_core_strftime().

     *

     * @return array

     */

    public static function get_strftime_provider(): array {

        return [

            'string_c' => [

                "1708405742",

                "%c",

                "20 February 2024 at 1:09 pm",

            ],

            'Month Year only' => [

                "1708405742",

                "%B %Y",

                "February 2024",

            ],

            'Abbreviated Month Year only' => [

                "1708405742",

                "%b %Y",

                "Feb 2024",

            ],

            'DD Month Year' => [

                "1708405742",

                "%d %B %Y",

                "20 February 2024",

            ],

            'D Month Year' => [

                "1708405742",

                "%e %B %Y",

                "20 February 2024",

            ],

            'Abbreviated DD Month Year' => [

                "1708405742",

                "%d %b %Y",

                "20 Feb 2024",

            ],

            'Abbreviated D Month Year' => [

                "1708405742",

                "%e %b %Y",

                "20 Feb 2024",

            ],

            'numeric_c' => [

                1708405742,

                "%c",

                "20 February 2024 at 1:09 pm",

            ],

            'string_strftimedatetime' => [

                "1708405742",

                get_string("strftimedatetime", 'langconfig'),

                "20 February 2024, 01:09 PM",

            ],

            'numeric_strftimedatetime' => [

                1708405742,

                get_string("strftimedatetime", 'langconfig'),

                "20 February 2024, 01:09 PM",

            ],

            'string_strftimedatetimeshortaccurate' => [

                "1708405742",

                get_string("strftimedatetimeshortaccurate", 'langconfig'),

                "20/02/24, 13:09:02",

            ],

            'numeric_strftimedatetimeshortaccurate' => [

                1708405742,

                get_string("strftimedatetimeshortaccurate", 'langconfig'),

                "20/02/24, 13:09:02",

            ],

        ];

    }

    /**

     * Test \core_date::strftime function.

     *

     * @dataProvider get_strftime_provider

     * @param mixed $input Input passed to strftime

     * @param string $format The date format to pass to strftime, falls back to '%c' if null

     * @param string $expected The output generated by strftime

     */

    public function test_strftime(mixed $input, string $format, string $expected): void {

        $this->assertEqualsIgnoringWhitespace($expected, core_date::strftime($format, $input));

    }

    /**

     * Data provider for ::test_strftime_locale.

     *

     * @return array[]

     */

    public static function get_strftime_locale_provider(): array {

        return [

            'Month Year only' => [

                "1728487000",

                'ru_RU.UTF-8',

                "%B %Y",

                "октябрь 2024",

            ],

            'DD Month Year' => [

                "1728487000",

                'ru_RU.UTF-8',

                "%d %B %Y",

                "09 октября 2024",

            ],

            'D Month Year' => [

                "1728487000",

                'ru_RU.UTF-8',

                "%e %B %Y",

                " 9 октября 2024",

            ],

            'Abbreviated Month Year only' => [

                "1728487000",

                'ru_RU.UTF-8',

                "%b %Y",

                "окт. 2024",

            ],

            'Abbreviated DD Month Year' => [

                "1728487000",

                'ru_RU.UTF-8',

                "%d %b %Y",

                "09 окт. 2024",

            ],

            'Abbreviated D Month Year' => [

                "1728487000",

                'ru_RU.UTF-8',

                "%e %b %Y",

                " 9 окт. 2024",

            ],

            'Invalid locale' => [

                1728487000,

                'xx',

                '%B %Y',

                'October 2024',

            ],

        ];

    }

    /**

     * Test \core_date::strftime function with alternate languages.

     *

     * @dataProvider get_strftime_locale_provider

     * @param mixed $input Input passed to strftime

     * @param string $locale The locale

     * @param string $format The date format to pass to strftime, falls back to '%c' if null

     * @param string $expected The output generated by strftime

     */

    public function test_strftime_locale(

        mixed $input,

        string $locale,

        string $format,

        string $expected,

    ): void {

        $this->assertEqualsIgnoringWhitespace(

            $expected,

            core_date::strftime($format, $input, $locale));

    }

}