Programmatically login as User in Symfony 4.3+ to 5 App with Behat + Mink 1.8 + FriendsOfBehat/SymfonyExtension

README.md

The TestBrowserToken is a copy modified for my needs and taken from here

It's first a Symfony feature implemented in 5.1 here, it's just the mink adaptation with new super Symfony extension.

security.feature

Feature:
  In order to prove that login and acces to back office works
  As a user
  I want to login

  Scenario:
    Given I login as "ROLE_ADMIN" on firewall "main"
    When I go to "/"
    Then I should be on "/" #normally, we get redirected in my case to /login if not logged in

SecurityContext.php

<?php

namespace App\Tests\Behat;

use Behat\Behat\Context\Context;
use Behat\Mink\Session;
use App\Entity\User;
use App\Repository\UserRepository;
use Symfony\Component\HttpKernel\KernelInterface;
use Symfony\Component\Routing\RouterInterface;

final class SecurityContext implements Context
{
    /** @var Session */
    private $session;

    /** @var RouterInterface */
    private $router;

    /** @var KernelInterface */
    private $kernel;

    public function __construct(Session $session, RouterInterface $router, KernelInterface $kernel)
    {
        $this->session = $session;
        $this->router = $router;
        $this->kernel = $kernel;
    }

    /**
     * @Given /^I login as "([^"]*)" on firewall "([^"]*)"$/
     */
    public function iAmLoggedInAs(string $role, string $firewallContext = 'main'): void
    {
        $container = $this->kernel->getContainer();
        /** @var UserRepository $userRepository */
        $userRepository = $container->get(UserRepository::class);
        /** @var User|null $user */
        $user = $userRepository
            ->createQueryBuilder('u')
            ->where('u.roles like :role')
            ->setParameter('role', '%'.$role.'%')
            ->setMaxResults(1)
            ->getQuery()
            ->getOneOrNullResult();

        if (!$user instanceof User) {
            throw new \LogicException(sprintf('No user bo have been found having role %s', $role));
        }

        $token = new TestBrowserToken($user->getRoles(), $user);
        $token->setAuthenticated(true);
        $session = $container->get('session');
        $session->set('_security_'.$firewallContext, serialize($token));
        $session->save();

        $this->session->setCookie($session->getName(), $session->getId());

        return;
    }
}

where is the code of your modify TestBrowserToken ?