SystemDateSettingsUpdateTest.php

<?php

declare (strict_types=1);
namespace Drupal\Tests\system\Functional\Update;

use Drupal\FunctionalTests\Update\UpdatePathTestBase;

/**
 * Tests system.date:country.default and system.date:timezone.default values.
 *
 * @group system
 * @covers \system_post_update_convert_empty_country_and_timezone_settings_to_null
 */
class SystemDateSettingsUpdateTest extends UpdatePathTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * {@inheritdoc}
     */
    protected function setDatabaseDumpFiles() {
        $this->databaseDumpFiles = [
            DRUPAL_ROOT . '/core/modules/system/tests/fixtures/update/drupal-9.4.0.bare.standard.php.gz',
        ];
    }
    
    /**
     * Tests update of system.date:country.default & system.date:country.default.
     */
    public function testUpdate() : void {
        // Replace the 'Australia/Sydney' time zone with an empty string, set
        // previously in \Drupal\Core\Test\FunctionalTestSetupTrait::initConfig().
        $this->config('system.date')
            ->set('timezone.default', '')
            ->save();
        $config_before = $this->config('system.date');
        $this->assertSame('', $config_before->get('country.default'));
        $this->assertSame('', $config_before->get('timezone.default'));
        $this->runUpdates();
        $config_after = $this->config('system.date');
        $this->assertNull($config_after->get('country.default'));
        $this->assertNull($config_after->get('timezone.default'));
    }

}