public function setUp()
{
$this->dm = $this->createDocumentManager(array(__DIR__));
$this->node = $this->resetFunctionalNode($this->dm);
$class = $this->dm->getClassMetadata('Doctrine\\Tests\\Models\\CMS\\CmsUser');
$class->mappings['groups']['cascade'] = ClassMetadata::CASCADE_REMOVE;
$class = $this->dm->getClassMetadata('Doctrine\\Tests\\Models\\CMS\\CmsUser');
$class->mappings['articlesReferrers']['cascade'] = ClassMetadata::CASCADE_REMOVE;
$class = $this->dm->getClassMetadata('Doctrine\\Tests\\Models\\CMS\\CmsGroup');
$class->mappings['users']['cascade'] = ClassMetadata::CASCADE_REMOVE;
$class = $this->dm->getClassMetadata('Doctrine\\Tests\\Models\\CMS\\CmsArticle');
$class->mappings['user']['cascade'] = ClassMetadata::CASCADE_REMOVE;
}