public HttpResponseMessage PostTest([FromBody] TestDataModel model)
        {
            foreach (var subject in model.SubjectList)
            {
                if (_questionDal.GetAllQuestions().Count(q => q.CategoryId == subject.Id) < model.NumberOfQuestions)
                {
                    return(Request.CreateResponse(HttpStatusCode.BadRequest, new { Message = " Number of questions to high " }));
                }
            }

            var questionList = new List <Question>();

            foreach (var subject in model.SubjectList)
            {
                var questions =
                    _questionDal.GetAllQuestions()
                    .Where(q => q.CategoryId == subject.Id)
                    .OrderBy(r => Guid.NewGuid())
                    .Take(model.NumberOfQuestions).ToList();
                questionList.AddRange(questions);
            }

            var test = _testDal.AddTestWithQuestions(model.TestName, model.TestLevelId,
                                                     new TimeSpan(model.Hours, model.Minutes, model.Seconds), questionList);


            return(Request.CreateResponse(HttpStatusCode.Created, new { Message = "Test has been created" }));
        }