SearchIndexTest.php

<?php

namespace Drupal\Tests\search\Kernel;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the service "search.index".
 *
 * @group search
 */
class SearchIndexTest extends KernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'search',
    ];
    
    /**
     * Test that the service "search.index" is backend overridable.
     */
    public function testSearchIndexServiceIsBackendOverridable() {
        $definition = $this->container
            ->getDefinition('search.index');
        $this->assertTrue($definition->hasTag('backend_overridable'));
    }

}