Symfony 2.5 profiler a Behat 3

app\config_test.yml

imports:
    - { resource: config_dev.yml }

framework:
    test: ~
    session:
        storage_id: session.storage.mock_file
    profiler:
        enabled: true
        collect: false
        only_exceptions: false

web_profiler:
    toolbar: false
    intercept_redirects: false

swiftmailer:
    disable_delivery: true

behat.yml

default:
    suites:
        default:
            contexts:
                - FeatureContext:
                    profiler: '@profiler'
            filters:
                tags: "~@javascript"
    extensions:
        Behat\MinkExtension:
            base_url:  'https://example.dev/app_test.php/'
            sessions:
                default:
                    symfony2: ~
                javascript:
                    selenium2:
                        wd_host: http://33.33.33.1:4444/wd/hub
            browser_name: chrome
            show_auto:    false
        Behat\Symfony2Extension: ~

Controller.php

<?php

namespace Bundle\WebsiteBundle\Controller;

use Sensio\Bundle\FrameworkExtraBundle\Configuration\Route;
use Sensio\Bundle\FrameworkExtraBundle\Configuration\Template;
use Symfony\Component\Form\FormFactoryInterface;
use Symfony\Component\HttpFoundation\RedirectResponse;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\RouterInterface;

/**
 * @Route(service="bundle.controller.Default")
 */
class DefaultController
{
    /**
     * @var \Symfony\Component\Form\FormFactoryInterface
     */
    private $formFactory;

    /**
     * @var \Swift_Mailer
     */
    private $mailer;

    /**
     * @var \Symfony\Component\Routing\RouterInterface
     */
    private $router;

    public function __construct(FormFactoryInterface $formFactory, \Swift_Mailer $mailer, RouterInterface $router)
    {
        $this->formFactory = $formFactory;
        $this->mailer = $mailer;
        $this->router = $router;
    }

    /**
     * @Route("/somePath")
     * @Template()
     */
    public function showAction(Request $request)
    {
        $form = $this->formFactory->create('formServiceName');

        if ($request->getMethod() === 'POST') {
            $form->submit($request);
            if ($form->isValid()) {
                $message = \Swift_Message::newInstance()
                    ->setSubject('Mail Subject')
                    ->setFrom('send@example.com')
                    ->setTo('receive@example.com')
                    ->setBody('Lorem Ipsum')
                ;
                $this->mailer->send($message);
                $request->getSession()->getFlashBag()->add('success','Well donea');
            } else {
                $request->getSession()->getFlashBag()->add('error','Something went wrong');   
            }
        }

        return array(
            'form' => $form->createView(),
        );
    }
}

feature\bootstrap\FeatureContext.php

<?php

use Behat\Behat\Context\SnippetAcceptingContext;
use Behat\MinkExtension\Context\MinkContext;
use Symfony\Component\HttpKernel\Profiler\Profiler;

class FeatureContext extends MinkContext implements SnippetAcceptingContext
{

    /** @var \Symfony\Component\HttpKernel\Profiler\Profiler */
    private $profiler;

    public function __construct(Profiler $profiler)
    {
        $this->profiler = $profiler;
        $this->profiler->enable();
    }

    /**
     * @BeforeScenario
     */
    public function enableFollowRedirects()
    {
        $this->getClient()->followRedirects(true);
    }

    /**
     * @When I press :button without redirection
     */
    public function iPressWithoutRedirection($button)
    {
        $this->getClient()->followRedirects(false);
        $button = $this->fixStepArgument($button);
        $this->getSession()->getPage()->pressButton($button);
    }

    /**
     * @When /^I follow the redirection$/
     * @Then /^I should be redirected$/
     */
    public function iFollowTheRedirection()
    {
        $client = $this->getClient();
        $client->followRedirects(true);

        return $client->followRedirect();
    }

    /**
     * @Then /^no email should have been sent$/
     */
    public function noEmailShouldHaveBeenSent()
    {
        /** @var Symfony\Bundle\SwiftmailerBundle\DataCollector\MessageDataCollector $mailer */
        $mailer = $this->getProfiler()->getCollector('swiftmailer');
        if (0 < $count = $mailer->getMessageCount()) {
            throw new \RuntimeException(sprintf('Expected no email to be sent, but %d emails were sent.', $count));
        }
    }

    /**
     * @Then email with subject :subject should have been sent to :to
     */
    public function emailWithSubjectShouldHaveBeenSentToWith($subject, $to)
    {
        /** @var Symfony\Bundle\SwiftmailerBundle\DataCollector\MessageDataCollector $mailer */
        $mailer = $this->getProfiler()->getCollector('swiftmailer');
        if (0 === $mailer->getMessageCount()) {
            throw new \RuntimeException('No emails have been sent.');
        }

        $foundToAddresses = null;
        $foundSubjects = array();
        foreach ($mailer->getMessages() as $message) {
            $foundSubjects[] = $message->getSubject();
            $foundToAddresses = implode(', ', array_keys($message->getTo()));
            if (trim($subject) === trim($message->getSubject())) {
                return;
            } else {
                continue;
            }
        }

        if (!$foundToAddresses) {
            if (!empty($foundSubjects)) {
                throw new \RuntimeException(sprintf('Subject "%s" was not found, but only these subjects: "%s"', $subject, implode('", "', $foundSubjects)));
            }
            // not found
            throw new \RuntimeException(sprintf('No message with subject "%s" found.', $subject));
        }
        throw new \RuntimeException(sprintf('Subject found, but "%s" is not among to-addresses: %s', $to, $foundToAddresses));
    }

    /**
     * @return Symfony\Bundle\FrameworkBundle\Client
     */
    private function getClient()
    {
        return $this->getSession()->getDriver()->getClient();
    }

    /**
     * @return \Symfony\Component\HttpKernel\Profiler\Profile
     */
    private function getProfiler()
    {
        return $this->getClient()->getProfile();
    }
}

Mój problem polega na tym, że w takiej w tym przypadku gdy uruchomię scenariusz behata:

  Scenario: Successfully send email
    Given I am on "/somePath"
    When I fill in "Name" with "Robert C. Martin's"
    And I press "Send" without redirection
    Then email with subject "Mail Subject" should have been sent to "receive@example.com"

To profiler nie istnieje i w feature\bootstrap\FeatureContext.php:107 dostaje Try to getProfile() on non-object

W przypadku, gdy w config_test.yml zmienię parametr profilera collect na true

framework:
    ....
    profiler:
        ...
        collect: true

wszystko jest w porządku.

---

I teraz o co chodzi.

Profiler nie jest mi potrzebny do wszystkich scenariuszy albo nawet całych suitów (bo spowalnia całe działanie itp.). Tak też w konfiguracji dla środowiska testowego chce go mieć wyłączonego, albo przynajmniej wyłączone zbieranie danych. Dokumentacji mówi, że możemy przeczytać:
If you want to only collect information on-demand, you can set the collect flag to false and activate the data collectors by hand:

$profiler->enable();

co teoretycznie robię konstruktorze, ale to nie chcę ze mną współpracować.

Co robię źle? Jakieś pomysły?