wordpress-develop/tests/phpunit/tests/date/getPermalink.php

<?php

/**
 * @group date
 * @group datetime
 * @group post
 * @covers ::get_permalink
 */
class Tests_Date_GetPermalink extends WP_UnitTestCase {

	function tearDown() {
		delete_option( 'permalink_structure' );
		update_option( 'timezone_string', 'UTC' );
		// phpcs:ignore WordPress.DateTime.RestrictedFunctions.timezone_change_date_default_timezone_set
		date_default_timezone_set( 'UTC' );

		parent::tearDown();
	}

	/**
	 * @ticket 48623
	 */
	public function test_should_return_correct_date_permalink_with_changed_time_zone() {
		$timezone = 'America/Chicago';
		update_option( 'timezone_string', $timezone );
		update_option( 'permalink_structure', '/%year%/%monthnum%/%day%/%hour%/%minute%/%second%' );
		// phpcs:ignore WordPress.DateTime.RestrictedFunctions.timezone_change_date_default_timezone_set
		date_default_timezone_set( 'UTC' );

		$post_id = self::factory()->post->create(
			array(
				'post_date'     => '2018-07-22 21:13:23',
				'post_date_gmt' => '2018-07-23 03:13:23',
			)
		);

		$this->assertSame( 'http://example.org/2018/07/22/21/13/23', get_permalink( $post_id ) );

		// phpcs:ignore WordPress.DateTime.RestrictedFunctions.timezone_change_date_default_timezone_set
		date_default_timezone_set( $timezone );
		$this->assertSame( 'http://example.org/2018/07/22/21/13/23', get_permalink( $post_id ) );
	}
}