/**
* @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);
}