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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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namespace core;
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/**
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 * Tests for the standard ClockInterface implementation.
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 *
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 * @package    core
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 * @category   test
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 * @copyright  2024 Andrew Lyons <andrew@nicols.co.uk>
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 * @covers \core\system_clock
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 */
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final class system_clock_test extends \advanced_testcase {
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    /**
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     * Test that the now method returns a DateTimeImmutable object.
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     */
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    public function test_now(): void {
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        $starttime = time();
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        $clock = new system_clock();
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        $now = $clock->now();
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        $this->assertInstanceOf(\DateTimeImmutable::class, $now);
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        $this->assertGreaterThanOrEqual($starttime, $now->getTimestamp());
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    }
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    /**
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     * Test that the time method returns a timestamp.
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     */
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    public function test_time(): void {
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        $starttime = time();
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        $clock = new system_clock();
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        $time = $clock->time();
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        $this->assertGreaterThanOrEqual($starttime, $time);
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    }
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    /**
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     * Test that the now method returns a DateTimeImmutable object in the server timezone.
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     *
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     * @dataProvider timezone_provider
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     * @param string $timezone
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     */
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    public function test_now_timezone(string $timezone): void {
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        global $CFG;
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        $this->resetAfterTest();
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        $CFG->timezone = $timezone;
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        $clock = new system_clock();
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        $now = $clock->now();
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        $this->assertEquals(\core_date::normalise_timezone($CFG->timezone), $now->getTimezone()->getName());
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    }
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    /**
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     * Data provider for the test_now_timezone method.
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     *
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     * @return array
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     */
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    public static function timezone_provider(): array {
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        return [
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            ['UTC'],
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            ['Europe/London'],
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            ['America/New_York'],
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        ];
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    }
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}