/**
  * @test
  */
 public function allSubGroupsCanBeRemoved()
 {
     $group1 = new \TYPO3\CMS\Extbase\Domain\Model\BackendUserGroup();
     $group1->setTitle('foo');
     $group2 = new \TYPO3\CMS\Extbase\Domain\Model\BackendUserGroup();
     $group2->setTitle('bar');
     $this->subject->addSubGroup($group1);
     $this->subject->addSubGroup($group2);
     $this->subject->removeAllSubGroups();
     $this->assertEquals(count($this->subject->getSubGroups()), 0);
 }