/**
  * @test
  */
 public function addHolidayToObjectStorageHoldingHoliday()
 {
     $holiday = new \MUM\BjrFreizeit\Domain\Model\Holiday();
     $holidayObjectStorageMock = $this->getMock('TYPO3\\CMS\\Extbase\\Persistence\\ObjectStorage', array('attach'), array(), '', FALSE);
     $holidayObjectStorageMock->expects($this->once())->method('attach')->with($this->equalTo($holiday));
     $this->inject($this->subject, 'holiday', $holidayObjectStorageMock);
     $this->subject->addHoliday($holiday);
 }