Symfony 3 unit test form with constructor - php

Question

I am trying to unit test a form which has 2 dependencies (ObjectManager and EventDispatcher)
I had tried to follow official doc but without success.
My testing file:
<?php
namespace Lch\MediaBundle\Tests\Form;
use Lch\MediaBundle\Form\AddImageType;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Doctrine\Common\Persistence\ObjectManager;
use Symfony\Component\Form\PreloadedExtension;
use Symfony\Component\Form\Test\TypeTestCase;
class AddImageTypeTest extends TypeTestCase
{
private $entityManager;
private $eventDispatcher;
protected function setUp()
{
$this->entityManager = $this->createMock(ObjectManager::class);
$this->eventDispatcher = $this->createMock(EventDispatcher::class);
parent::setUp();
}
protected function getExtensions()
{
$type = new AddImageType($this->entityManager, $this->eventDispatcher);
return array(
new PreloadedExtension(array($type), array()),
);
}
public function testSubmitValidData()
{
$form = $this->factory->create(AddImageType::class);
}
}
I got this error when I execute my test suite:
TypeError: Argument 1 passed to
LCH\MediaBundle\Form\AddImageType::__construct() must implement
interface Doctrine\Common\Persistence\ObjectManager, none given,
called in
/home/matthieu/www/lch/media/src/Lch/MediaBundle/vendor/symfony/symfony/src/Symfony/Component/Form/FormRegistry.php
on line 85
It seems that the job I do in the getExtensions method is not working, but cannot figure it out.
Does anyone have a clue?

Answer 1

ObjectManager is an interface, meaning you can't instantiate or pass it directly to other constructors.
If you are using Doctrine, replace it with Doctrine\ORM\EntityManager which implements ObjectManager interface and can be instantiated, otherwise replace it with your own implementation.
<?php
namespace Lch\MediaBundle\Tests\Form;
use Lch\MediaBundle\Form\AddImageType;
use Symfony\Component\EventDispatcher\EventDispatcher;
use Doctrine\ORM\EntityManager;
use Symfony\Component\Form\PreloadedExtension;
use Symfony\Component\Form\Test\TypeTestCase;
class AddImageTypeTest extends TypeTestCase
{
private $entityManager;
private $eventDispatcher;
protected function setUp()
{
$this->entityManager = $this->createMock(EntityManager::class);
$this->eventDispatcher = $this->createMock(EventDispatcher::class);
parent::setUp();
}
protected function getExtensions()
{
$type = new AddImageType($this->entityManager, $this->eventDispatcher);
return array(
new PreloadedExtension(array($type), array()),
);
}
public function testSubmitValidData()
{
$form = $this->factory->create(AddImageType::class);
}
}