UserRoleTest.php

<?php

namespace Drupal\Tests\user\Kernel\Views;

use Drupal\Tests\views\Kernel\ViewsKernelTestBase;
use Drupal\user\Entity\Role;
use Drupal\user\Entity\User;
use Drupal\views\Views;

/**
 * Tests rendering when the role is numeric.
 *
 * @group user
 */
class UserRoleTest extends ViewsKernelTestBase {
    
    /**
     * Tests numeric role.
     */
    public function testNumericRole() {
        $this->installEntitySchema('user');
        $this->installSchema('user', [
            'users_data',
        ]);
        Role::create([
            'id' => 123,
            'label' => 'Numeric',
        ])->save();
        $user = User::create([
            'uid' => 2,
            'name' => 'foo',
            'roles' => 123,
        ]);
        $user->save();
        $view = Views::getView('user_admin_people');
        $this->executeView($view);
        $view->render('user_admin_people');
        $output = $view->field['roles_target_id']
            ->render($view->result[0]);
        $this->assertEquals(2, $output);
    }

}