$this->assertNotEmpty($content->getMimetype(), 'Mimetype for https://ma.ttias.be is ok');
$this->assertNotEmpty($content->getPreviewPicture(), 'Preview picture for https://ma.ttias.be is ok');
$this->assertNotEmpty($content->getLanguage(), 'Language for https://ma.ttias.be is ok');
$this->assertNotEmpty($content->getMimetype(), 'Mimetype for https://ma.ttias.be is ok');
$this->assertNotEmpty($content->getPreviewPicture(), 'Preview picture for https://ma.ttias.be is ok');
$this->assertNotEmpty($content->getLanguage(), 'Language for https://ma.ttias.be is ok');