protected function setUp()
{
$this->datatype = DatatypeModel::fromArray(array('name' => 'MixedTest', 'prevalue_value' => 'a:1:{s:9:"datatypes";a:1:{i:0;a:3:{s:4:"name";' . 's:10:"Textstring";s:5:"label";s:4:"Test";s:6:"config";' . 'a:1:{s:6:"length";s:0:"";}}}}', 'model' => 'Mixed'));
$this->datatype->save();
$datatype = new Datatype();
$application = Registry::get('Application');
$datatype->setRequest($application->getServiceManager()->get('Request'));
$datatype->setRouter($application->getServiceManager()->get('Router'));
$datatype->setHelperManager($application->getServiceManager()->get('viewhelpermanager'));
$datatype->setDatatypesList($application->getServiceManager()->get('DatatypesList'));
$datatype->load($this->datatype);
$this->object = $datatype->getPrevalueEditor();
}