public function testRemoveInterviewQuestion()
 {
     $intSchema = new InterviewSchema();
     $intQuestion = new InterviewQuestion();
     $intSchema->addInterviewQuestion($intQuestion);
     $this->assertContainsOnly($intQuestion, $intSchema->getInterviewQuestions());
     $intSchema->removeInterviewQuestion($intQuestion);
     $this->assertNotContains($intQuestion, $intSchema->getInterviewQuestions());
 }