protected function setUpMedia()
{
// Create Media Type
$documentType = new MediaType();
$documentType->setName('document');
$documentType->setDescription('This is a document');
$imageType = new MediaType();
$imageType->setName('image');
$imageType->setDescription('This is an image');
$videoType = new MediaType();
$videoType->setName('video');
$videoType->setDescription('This is a video');
$this->mediaTypes['image'] = $imageType;
$this->mediaTypes['video'] = $videoType;
// create some tags
$tag1 = new Tag();
$tag1->setName('Tag 1');
$tag2 = new Tag();
$tag2->setName('Tag 2');
$this->em->persist($tag1);
$this->em->persist($tag2);
$this->em->persist($documentType);
$this->em->persist($imageType);
$this->em->persist($videoType);
$this->em->flush();
}