How to mock dependency injection with phpunit?

Question

I wish to test methods in this class:

class EmailerService
{
    protected $mailer;
    protected $router;
    protected $em;
    protected $emailMan;
    protected $emailReminderMan;
    protected $secret;

    /**
     * Construct
     *
     * @param \Swift_Mailer                                             $mailer
     * @param \Symfony\Bundle\FrameworkBundle\Routing\Router            $router
     * @param \Doctrine\ORM\EntityManager                               $em
     * @param EmailManager                                              $emailMan
     * @param EmailReminderManager                                      $emailReminderMan
     * @param                                                           $secret
     */
    public function __construct(Swift_Mailer $mailer, Router $router, EntityManager $em, EmailManager $emailMan, EmailReminderManager $emailReminderMan, $secret)
    {
        $this->mailer = $mailer;
        $this->router = $router;
        $this->em = $em;
        $this->emailMan = $emailMan;
        $this->emailReminderMan = $emailReminderMan;
        $this->secret = $secret;
    }

My test currently looks like this:

class EmailerServiceTest extends \PHPUnit_Framework_TestCase
{
    protected $emailer;

    public function setUp()
    {
        $mailer = $this->getMockBuilder('Swift_Mailer')
            ->disableOriginalConstructor()
            ->getMock();

        $router = $this->getMockBuilder('Router')
            ->disableOriginalConstructor()
            ->getMock();

        $em = $this->getMockBuilder('EntityManager')
            ->disableOriginalConstructor()
            ->getMock();

        $emailMan = $this->getMockBuilder('EmailManager')
            ->disableOriginalConstructor()
            ->getMock();

        $emailReminderMan = $this->getMockBuilder('EmailReminderManager')
            ->disableOriginalConstructor()
            ->getMock();

        $secret = '123';

        $this->emailer = new EmailerService($mailer, $router, $em, $emailMan, $emailReminderMan, $secret);
    }

But I get the error:

1) T\CBundle\Tests\Service\EmailerServiceTest::testGetVariablesForModule Argument 2 passed to T\CBundle\Service\EmailerService::__construct() must be an instance of Symfony\Bundle\FrameworkBundle\Routing\Router, instance of Mock_Router_3e61717e given, called in ...

Also a bit confused why it triggers with Router, and not first with Swift_Mailer

@DonCallisto The correct files are imported/used at the top; Router specifically is Symfony\Bundle\FrameworkBundle\Routing\Router — Tjorriemorrie
– Tjorriemorrie, Commented Jan 31, 2014 at 9:46
new EmailerService($mailer, $router, .... ) could you show us the declaration of $router? Moreover, could I know if EmailerService is registered as a service or is only a naming convention that you use? — DonCallisto
– DonCallisto, Commented Jan 31, 2014 at 10:00
Try with $this->getMockBuilder('Symfony\Bundle\Frameworkbundle\Routing\Router') — Touki
– Touki, Commented Jan 31, 2014 at 10:10
@Tjorriemorrie: sorry, I didn't notice the code where you instantiate it ... — DonCallisto
– DonCallisto, Commented Jan 31, 2014 at 10:18

Wouter J · Accepted Answer · 2014-01-31 10:51:21Z

You have to use the real classname, otherwise PHPunit will just create a class named Router (note: this is not the expected Symfony\Component\Routing\Router):

     // don't need it here, Swift_Mailer is in the global scope
    $mailer = $this->getMockBuilder('Swift_Mailer')
        ->disableOriginalConstructor()
        ->getMock();

    $router = $this->getMockBuilder('Symfony\Bundle\FrameworkBundle\Routing\Router')
        ->disableOriginalConstructor()
        ->getMock();

    $em = $this->getMockBuilder('Doctrine\ORM\EntityManager')
        ->disableOriginalConstructor()
        ->getMock();

    $emailMan = $this->getMockBuilder('Full\Namespace\To\EmailManager')
        ->disableOriginalConstructor()
        ->getMock();

    $emailReminderMan = $this->getMockBuilder('Full\Namespace\To\EmailReminderManager')
        ->disableOriginalConstructor()
        ->getMock();

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