symfony-5-cli-template/tests/acceptance/PageControllerCest.php

<?php

declare(strict_types=1);

namespace App\Tests\acceptance\Controller;

use App\Tests\AcceptanceTester;

class PageControllerCest
{
    /** @var AcceptanceTester */
    private $tester;

    public function _before(AcceptanceTester $tester): void
    {
        $this->tester = $tester;
    }

    public function testBaseAvailability(): void
    {
        $this->tester->amOnPage('/');
        $this->tester->seeResponseCodeIs(400);
    }
}