UninstallKernelTest.php

<?php

namespace Drupal\Tests\system\Kernel\Installer;

use Drupal\KernelTests\KernelTestBase;

/**
 * Tests the uninstallation of modules.
 *
 * @group Module
 */
class UninstallKernelTest extends KernelTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    public static $modules = [
        'system',
        'user',
        'field',
        'file',
        'image',
        'media',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() {
        parent::setUp();
        $this->installSchema('user', [
            'users_data',
        ]);
        $this->installEntitySchema('media');
        $this->installEntitySchema('file');
        $this->installConfig([
            'media',
        ]);
    }
    
    /**
     * Tests uninstalling media and file modules.
     */
    public function testUninstallMedia() {
        // Media creates a file field that is removed on uninstall, ensure that it
        // is fully deleted (as it is empty) and that file then can be uninstalled
        // as well.
        \Drupal::service('module_installer')->uninstall([
            'media',
        ]);
        \Drupal::service('module_installer')->uninstall([
            'file',
        ]);
    }

}