LegacyMimeTypeTest.php

<?php

declare (strict_types=1);
namespace Drupal\KernelTests\Core\File\MimeType;

use Drupal\Core\File\MimeType\MimeTypeMapInterface;
use Drupal\KernelTests\KernelTestBase;

/**
 * Tests deprecated file features.
 *
 * @group legacy
 * @group File
 */
class LegacyMimeTypeTest extends KernelTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'system',
        'file_deprecated_test',
    ];
    
    /**
     * Tests deprecation of hook_file_mimetype_mapping_alter.
     *
     * @group legacy
     */
    public function testHookFileMimetypeMappingAlter() : void {
        $this->expectDeprecation('The deprecated alter hook hook_file_mimetype_mapping_alter() is implemented in these locations: file_deprecated_test_file_mimetype_mapping_alter. This hook is deprecated in drupal:11.2.0 and is removed from drupal:12.0.0. Implement a \\Drupal\\Core\\File\\Event\\MimeTypeMapLoadedEvent listener instead. See https://www.drupal.org/node/3494040');
        $map = \Drupal::service(MimeTypeMapInterface::class);
        $this->assertEquals([
            'file_test_2',
            'file_test_3',
        ], $map->getExtensionsForMimeType('made_up/file_test_2'));
    }

}