UserRequirementsTest.php

<?php

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

use Drupal\Tests\BrowserTestBase;

/**
 * Tests the requirements checks of the User module.
 *
 * @group user
 */
class UserRequirementsTest extends BrowserTestBase {
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Tests that the requirements check can detect a missing anonymous user.
     */
    public function testAnonymousUser() : void {
        // Remove the anonymous user.
        \Drupal::database()->delete('users')
            ->condition('uid', 0)
            ->execute();
        $this->drupalLogin($this->drupalCreateUser([
            'access administration pages',
            'administer site configuration',
        ]));
        $this->drupalGet('/admin/reports/status');
        $this->assertSession()
            ->statusCodeEquals(200);
        $this->assertSession()
            ->pageTextContains("The anonymous user does not exist.");
    }

}