PermissionsTest.php

<?php

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

use Drupal\KernelTests\KernelTestBase;

/**
 * @group system
 */
class PermissionsTest extends KernelTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected static $modules = [
    'system',
    'user',
  ];
  
  /**
   * Tests the 'access content' permission is provided by the System module.
   */
  public function testAccessContentPermission() : void {
    // Uninstalling modules requires the users_data table to exist.
    $this->installSchema('user', [
      'users_data',
    ]);
    $permissions = $this->container
      ->get('user.permissions')
      ->getPermissions();
    $this->assertSame('system', $permissions['access content']['provider']);
    // Install the 'node' module, assert that it is now the 'node' module
    // providing the 'access content' permission.
    $this->container
      ->get('module_installer')
      ->install([
      'node',
    ]);
    $permissions = $this->container
      ->get('user.permissions')
      ->getPermissions();
    $this->assertSame('system', $permissions['access content']['provider']);
    // Uninstall the 'node' module, assert that it is again the 'system' module.
    $this->container
      ->get('module_installer')
      ->uninstall([
      'node',
    ]);
    $permissions = $this->container
      ->get('user.permissions')
      ->getPermissions();
    $this->assertSame('system', $permissions['access content']['provider']);
  }

}