public function testRemoveAlternative()
 {
     $intQuestion = new InterviewQuestion();
     $alternative = new InterviewQuestionAlternative();
     $intQuestion->addAlternative($alternative);
     $this->assertContainsOnly($alternative, $intQuestion->getAlternatives());
     $intQuestion->removeAlternative($alternative);
     $this->assertNotContains($alternative, $intQuestion->getAlternatives());
 }