/**
* @test
*/
public function addTagToObjectStorageHoldingTags()
{
$tag = new \MUM\BjrFreizeit\Domain\Model\Tags();
$tagsObjectStorageMock = $this->getMock('TYPO3\\CMS\\Extbase\\Persistence\\ObjectStorage', array('attach'), array(), '', FALSE);
$tagsObjectStorageMock->expects($this->once())->method('attach')->with($this->equalTo($tag));
$this->inject($this->subject, 'tags', $tagsObjectStorageMock);
$this->subject->addTag($tag);
}