get-installer-bootstrap/tests/Controller/Admin/AuthControllerTest.php

<?php

namespace App\Tests\Controller\Admin;

use App\Entity\User;
use App\Tests\DatabaseWebTestCase;
use Symfony\Component\PasswordHasher\Hasher\UserPasswordHasherInterface;

final class AuthControllerTest extends DatabaseWebTestCase
{
    public function testAdminRedirectsToLogin(): void
    {
        $this->client->request('GET', '/admin');

        self::assertResponseRedirects('/admin/login');
    }

    public function testAdminCanLogin(): void
    {
        $container = static::getContainer();

        $user = (new User())->setUsername('admin');
        $hash = $container->get(UserPasswordHasherInterface::class)->hashPassword($user, 'secret-password');
        $user->setPasswordHash($hash);

        $this->entityManager->persist($user);
        $this->entityManager->flush();

        $crawler = $this->client->request('GET', '/admin/login');
        $form = $crawler->selectButton('Sign in')->form([
            'login_form[username]' => 'admin',
            'login_form[password]' => 'secret-password',
        ]);
        $this->client->submit($form);

        self::assertResponseRedirects('/admin');
    }

    public function testLoginUsesUtilityAdminLayout(): void
    {
        $this->client->request('GET', '/admin/login');

        self::assertSelectorExists('body.admin-auth');
        self::assertSelectorExists('.admin-card');
        self::assertSelectorExists('.button-primary');
    }
}