public async Task <SampleExam.Domain.UserExam> SelectUserExamAsync(int userExamId)
{
SampleExam.Domain.UserExam userExam = null;
using (var dbContext = this.dbContextFactory.CreateDbContext())
{
userExam = await dbContext.UserExams.FindAsync(userExamId);
}
return(userExam);
}
public async Task <Tuple <int, int> > TakeExam(int userExamId, bool fail = false, bool skipSomeQuestions = false)
{
var link = "/questionanswers";
SampleExam.Domain.UserExam userExam = null;
using (var context = dbContextFactory.CreateDbContext())
{
userExam = context.UserExams
.Include(e => e.Exam)
.ThenInclude(e => e.Questions).ThenInclude(e => e.AnswerOptions)
.Where(e => e.Id == userExamId).First();
}
var questions = userExam.Exam.Questions.Shuffle().ToArray();
int rightAnswerCount = questions.Length * userExam.Exam.PassPercentage / 100;
rightAnswerCount = fail ? Math.Max(0, rightAnswerCount - 2) : Math.Min(questions.Length, rightAnswerCount + 2);
if (skipSomeQuestions)
{
var takePersentage = userExam.Exam.PassPercentage + ((100 - userExam.Exam.PassPercentage) / 2);
var take = questions.Count() * takePersentage / 100;
take = Math.Max(take, rightAnswerCount);
questions = questions.Take(take).ToArray();
}
Assert.True(questions.Count() > rightAnswerCount);
var request = new Request();
request.UserExamQuestionAnswer = new UserExamQuestionAnswerData()
{
UserExamId = userExamId
};
//answering questions randomly
foreach (var question in questions)
{
request.UserExamQuestionAnswer.QuestionId = question.Id;
request.UserExamQuestionAnswer.AnswerOptionIds = AnswerQuestion(question, AnswerType.Random);
var questionAnswer = await client.PostQuestionAnswerSuccesfully(link, request);
}
//changing answers to fail/succeed
var random = Utils.NewRandom();
for (int i = 0; i < questions.Length; i++)
{
var question = questions[i];
request.UserExamQuestionAnswer.QuestionId = question.Id;
var answerType = i < rightAnswerCount ? AnswerType.Right : AnswerType.Wrong;
request.UserExamQuestionAnswer.AnswerOptionIds = AnswerQuestion(question, answerType);
var questionAnswer = await client.PostQuestionAnswerSuccesfully(link, request);
}
return(Tuple.Create(rightAnswerCount, questions.Count()));
}
public async Task <SampleExam.Domain.UserExam> UpdateUserExamStartDate(int userExamId, int minutesToAdd)
{
SampleExam.Domain.UserExam userExam = null;
using (var dbContext = this.dbContextFactory.CreateDbContext())
{
userExam = await dbContext.UserExams.FindAsync(userExamId);
userExam.StartedtedAt = userExam.StartedtedAt.AddMinutes(minutesToAdd);
await dbContext.SaveChangesAsync();
}
return(userExam);
}
