@Test(timeout = 1000)
    public void randomQuestion() throws Exception {
        ExcSet excSet = Jcp1ExcSet.getInstance();
        QuestionGeneratorImpl rnd = new QuestionGeneratorImpl(excSet);
        Set<Class> wasQuestionClass = new HashSet<>(4);
        while (wasQuestionClass.size() != 4) {
            Question q = rnd.randomQuestion();
            wasQuestionClass.add(q.getClass());
        }
    }