/**
  * @covers Rcm\Plugin\PluginInterface::saveInstance
  * @covers RcmSocialButtons\Controller\PluginController::saveInstance
  */
 function testSaveAction()
 {
     $em = $this->getEmMock();
     $em->expects($this->once())->method('persist');
     $em->expects($this->once())->method('flush');
     $this->unit->setEm($em);
     $this->unit->saveInstance(42, '<p>hi</p>');
 }