path: root/yaksh/test_models.py

import unittest
from yaksh.models import User, Profile, Question, Quiz, QuestionPaper,\
    QuestionSet, AnswerPaper, Answer, Course, StandardTestCase,\
    StdIOBasedTestCase, FileUpload, McqTestCase
import json
from datetime import datetime, timedelta
from django.utils import timezone
import pytz
from django.contrib.auth.models import Group
from django.core.files import File
import zipfile
import os
import shutil
import tempfile

def setUpModule():
    # create user profile
    user = User.objects.create_user(username='demo_user',
                                    password='demo',
                                    email='demo@test.com')
    User.objects.create_user(username='demo_user2',
                             password='demo',
                             email='demo@test.com')
    Profile.objects.create(user=user, roll_number=1, institute='IIT',
                           department='Chemical', position='Student')
    student = User.objects.create_user(username='demo_user3',
                                       password='demo',
                                       email='demo3@test.com')
    Profile.objects.create(user=student, roll_number=3, institute='IIT',
                           department='Chemical', position='Student')

    # create a course
    course = Course.objects.create(name="Python Course",
                                   enrollment="Enroll Request", creator=user)

    # create 20 questions
    for i in range(1, 21):
        Question.objects.create(summary='Q%d' % (i), points=1, type='code', user=user)

    # create a quiz
    quiz = Quiz.objects.create(start_date_time=datetime(2015, 10, 9, 10, 8, 15, 0,
                                                        tzinfo=pytz.utc),
                        end_date_time=datetime(2199, 10, 9, 10, 8, 15, 0,
                                               tzinfo=pytz.utc),
                        duration=30, active=True,
                        attempts_allowed=1, time_between_attempts=0,
                        description='demo quiz', pass_criteria=0,
                        language='Python', prerequisite=None,
                        course=course, instructions="Demo Instructions")

    Quiz.objects.create(start_date_time=datetime(2014, 10, 9, 10, 8, 15, 0,
                                                 tzinfo=pytz.utc),
                        end_date_time=datetime(2015, 10, 9, 10, 8, 15, 0,
                                               tzinfo=pytz.utc),
                        duration=30, active=False,
                        attempts_allowed=-1, time_between_attempts=0,
                        description='demo quiz', pass_criteria=40,
                        language='Python', prerequisite=quiz,
                        course=course, instructions="Demo Instructions")

    with open('/tmp/test.txt', 'wb') as f:
        f.write('2'.encode('ascii'))

def tearDownModule():
    User.objects.all().delete()
    Question.objects.all().delete()
    Quiz.objects.all().delete()
    
    que_id_list = ["25", "22", "24", "27"]
    for que_id in que_id_list:
        dir_path = os.path.join(os.getcwd(), "yaksh", "data","question_{0}".format(que_id))
        if os.path.exists(dir_path):
            shutil.rmtree(dir_path)

###############################################################################
class ProfileTestCases(unittest.TestCase):
    def setUp(self):
        self.user1 = User.objects.get(pk=1)
        self.profile = Profile.objects.get(pk=1)
        self.user2 = User.objects.get(pk=3)

    def test_user_profile(self):
        """ Test user profile"""
        self.assertEqual(self.user1.username, 'demo_user')
        self.assertEqual(self.profile.user.username, 'demo_user')
        self.assertEqual(int(self.profile.roll_number), 1)
        self.assertEqual(self.profile.institute, 'IIT')
        self.assertEqual(self.profile.department, 'Chemical')
        self.assertEqual(self.profile.position, 'Student')

###############################################################################
class QuestionTestCases(unittest.TestCase):
    def setUp(self):
        # Single question details
        self.user1 = User.objects.get(pk=1)
        self.user2 = User.objects.get(pk=2)
        self.question1 = Question(summary='Demo question',
            language='Python',
            type='Code',
            active=True,
            test_case_type='standardtestcase',
            description='Write a function',
            points=1.0,
            snippet='def myfunc()',
            user=self.user1
        )
        self.question1.save()

        self.question2 = Question(summary='Demo Json',
            language='python',
            type='code',
            active=True,
            description='factorial of a no',
            test_case_type='standardtestcase',
            points=2.0,
            snippet='def fact()',
            user=self.user2
        )
        self.question2.save()

        # create a temp directory and add files for loading questions test
        file_path = "/tmp/test.txt"
        self.load_tmp_path = tempfile.mkdtemp()
        shutil.copy(file_path, self.load_tmp_path)
        file1 = os.path.join(self.load_tmp_path, "test.txt")

        # create a temp directory and add files for dumping questions test
        self.dump_tmp_path = tempfile.mkdtemp()
        shutil.copy(file_path, self.dump_tmp_path)
        file2 = os.path.join(self.dump_tmp_path, "test.txt")
        file = open(file2, "r")
        django_file = File(file)
        file = FileUpload.objects.create(file=django_file, question=self.question2)

        self.question1.tags.add('python', 'function')
        self.assertion_testcase = StandardTestCase(question=self.question1,
            test_case='assert myfunc(12, 13) == 15',
            type='standardtestcase'
        )
        self.upload_test_case = StandardTestCase(question=self.question2,
            test_case='assert fact(3) == 6',
            type='standardtestcase'
        )
        self.upload_test_case.save()
        self.user_answer = "demo_answer"
        self.test_case_upload_data = [{"test_case": "assert fact(3)==6",
                                        "test_case_type": "standardtestcase",
                                        "weight": 1.0
                                        }]
        questions_data = [{"snippet": "def fact()", "active": True,
                           "points": 1.0,
                           "description": "factorial of a no",
                           "language": "Python", "type": "Code",
                           "testcase": self.test_case_upload_data,
                           "files": [[file1, 0]],
                           "summary": "Json Demo"}]
        self.json_questions_data = json.dumps(questions_data)

    def tearDown(self):
        shutil.rmtree(self.load_tmp_path)
        shutil.rmtree(self.dump_tmp_path)

    def test_question(self):
        """ Test question """
        self.assertEqual(self.question1.summary, 'Demo question')
        self.assertEqual(self.question1.language, 'Python')
        self.assertEqual(self.question1.type, 'Code')
        self.assertEqual(self.question1.description, 'Write a function')
        self.assertEqual(self.question1.points, 1.0)
        self.assertTrue(self.question1.active)
        self.assertEqual(self.question1.snippet, 'def myfunc()')
        tag_list = []
        for tag in self.question1.tags.all():
                    tag_list.append(tag.name)
        for tag in tag_list:
            self.assertIn(tag, ['python', 'function'])

    def test_dump_questions(self):
        """ Test dump questions into json """
        question = Question()
        question_id = [self.question2.id]
        questions_zip = question.dump_questions(question_id, self.user2)
        que_file = FileUpload.objects.get(question=self.question2.id)
        zip_file = zipfile.ZipFile(questions_zip, "r")
        tmp_path = tempfile.mkdtemp()
        zip_file.extractall(tmp_path)
        test_case = self.question2.get_test_cases()
        with open("{0}/questions_dump.json".format(tmp_path), "r") as f:
            questions = json.loads(f.read())
            for q in questions:
                self.assertEqual(self.question2.summary, q['summary'])
                self.assertEqual(self.question2.language, q['language'])
                self.assertEqual(self.question2.type, q['type'])
                self.assertEqual(self.question2.description, q['description'])
                self.assertEqual(self.question2.points, q['points'])
                self.assertTrue(self.question2.active)
                self.assertEqual(self.question2.snippet, q['snippet'])
                self.assertEqual(self.question2.test_case_type, q['test_case_type'])
                self.assertEqual(os.path.basename(que_file.file.path), q['files'][0][0])
                self.assertEqual([case.get_field_value() for case in test_case], q['testcase'])
        for file in zip_file.namelist():
            os.remove(os.path.join(tmp_path, file))

    def test_load_questions(self):
        """ Test load questions into database from json """
        question = Question()
        result = question.load_questions(self.json_questions_data, self.user1)
        question_data = Question.objects.get(pk=25)
        file = FileUpload.objects.get(question=25)
        test_case = question_data.get_test_cases()
        self.assertEqual(question_data.summary, 'Json Demo')
        self.assertEqual(question_data.language, 'Python')
        self.assertEqual(question_data.type, 'Code')
        self.assertEqual(question_data.description, 'factorial of a no')
        self.assertEqual(question_data.points, 1.0)
        self.assertTrue(question_data.active)
        self.assertEqual(question_data.snippet, 'def fact()')
        self.assertEqual(os.path.basename(file.file.path), "test.txt")
        self.assertEqual([case.get_field_value() for case in test_case], self.test_case_upload_data)


###############################################################################
class QuizTestCases(unittest.TestCase):
    def setUp(self):
        self.creator = User.objects.get(pk=1)
        self.teacher = User.objects.get(pk=2)
        self.quiz1 = Quiz.objects.get(pk=1)
        self.quiz2 = Quiz.objects.get(pk=2)
        self.trial_course = Course.objects.create_trial_course(self.creator)

    def test_quiz(self):
        """ Test Quiz"""
        self.assertEqual((self.quiz1.start_date_time).strftime('%Y-%m-%d'),
                         '2015-10-09')
        self.assertEqual((self.quiz1.start_date_time).strftime('%H:%M:%S'),
                         '10:08:15')
        self.assertEqual(self.quiz1.duration, 30)
        self.assertTrue(self.quiz1.active)
        self.assertEqual(self.quiz1.description, 'demo quiz')
        self.assertEqual(self.quiz1.language, 'Python')
        self.assertEqual(self.quiz1.pass_criteria, 0)
        self.assertEqual(self.quiz1.prerequisite, None)
        self.assertEqual(self.quiz1.instructions, "Demo Instructions")

    def test_is_expired(self):
        self.assertFalse(self.quiz1.is_expired())
        self.assertTrue(self.quiz2.is_expired())

    def test_has_prerequisite(self):
        self.assertFalse(self.quiz1.has_prerequisite())
        self.assertTrue(self.quiz2.has_prerequisite())

    def test_get_active_quizzes(self):
        quizzes = Quiz.objects.get_active_quizzes()
        for quiz in quizzes:
            self.assertTrue(quiz.active)

    def test_create_trial_quiz(self):
        """Test to check if trial quiz is created"""
        trial_quiz = Quiz.objects.create_trial_quiz(self.trial_course,
                                                    self.creator
                                                    )
        self.assertEqual(trial_quiz.course, self.trial_course)
        self.assertEqual(trial_quiz.duration, 1000)
        self.assertEqual(trial_quiz.description, "trial_questions")
        self.assertTrue(trial_quiz.is_trial)
        self.assertEqual(trial_quiz.time_between_attempts, 0)

    def test_create_trial_from_quiz_godmode(self):
        """Test to check if a copy of original quiz is created in godmode"""
        trial_quiz = Quiz.objects.create_trial_from_quiz(self.quiz1.id,
                                                         self.creator,
                                                         True
                                                         )
        self.assertEqual(trial_quiz.description, "Trial_orig_id_1_godmode")
        self.assertTrue(trial_quiz.is_trial)
        self.assertEqual(trial_quiz.duration, 1000)
        self.assertTrue(trial_quiz.active)
        self.assertEqual(trial_quiz.end_date_time,
                         datetime(2199, 1, 1, 0, 0, 0, 0, tzinfo=pytz.utc)
                         )
        self.assertEqual(trial_quiz.time_between_attempts, 0)

    def test_create_trial_from_quiz_usermode(self):
        """Test to check if a copy of original quiz is created in usermode"""
        trial_quiz = Quiz.objects.create_trial_from_quiz(self.quiz2.id,
                                                         self.creator,
                                                         False
                                                         )
        self.assertEqual(trial_quiz.description, "Trial_orig_id_2_usermode")
        self.assertTrue(trial_quiz.is_trial)
        self.assertEqual(trial_quiz.duration, self.quiz2.duration)
        self.assertEqual(trial_quiz.active, self.quiz2.active)
        self.assertEqual(trial_quiz.start_date_time,
                         self.quiz2.start_date_time
                         )
        self.assertEqual(trial_quiz.end_date_time,
                         self.quiz2.end_date_time
                         )
        self.assertEqual(trial_quiz.time_between_attempts, 0)

    def test_view_answerpaper(self):
        self.assertFalse(self.quiz1.view_answerpaper)
        self.assertFalse(self.quiz2.view_answerpaper)

        # When
        self.quiz1.view_answerpaper = True
        self.quiz1.save()

        # Then
        self.assertTrue(self.quiz1.view_answerpaper)



###############################################################################
class QuestionPaperTestCases(unittest.TestCase):
    @classmethod
    def setUpClass(self):
        # All active questions
        self.questions = Question.objects.filter(active=True)
        self.quiz = Quiz.objects.get(id=1)

        # create question paper
        self.question_paper = QuestionPaper.objects.create(quiz=self.quiz,
            total_marks=0.0,
            shuffle_questions=True
        )

        # add fixed set of questions to the question paper
        self.question_paper.fixed_questions.add(self.questions[3],
                                                self.questions[5])
        # create two QuestionSet for random questions
        # QuestionSet 1
        self.question_set_1 = QuestionSet.objects.create(marks=2,
            num_questions=2
        )

        # add pool of questions for random sampling
        self.question_set_1.questions.add(self.questions[6],
            self.questions[7],
            self.questions[8],
            self.questions[9]
        )
        # add question set 1 to random questions in Question Paper
        self.question_paper.random_questions.add(self.question_set_1)

        # QuestionSet 2
        self.question_set_2 = QuestionSet.objects.create(marks=3,
            num_questions=3
        )

        # add pool of questions
        self.question_set_2.questions.add(self.questions[11],
            self.questions[12],
            self.questions[13],
            self.questions[14]
        )
        # add question set 2
        self.question_paper.random_questions.add(self.question_set_2)

        # ip address for AnswerPaper
        self.ip = '127.0.0.1'

        self.user = User.objects.get(pk=1)

        self.attempted_papers = AnswerPaper.objects.filter(
            question_paper=self.question_paper,
            user=self.user
        )

        # For Trial case
        self.questions_list = [self.questions[3].id, self.questions[5].id]
        trial_course = Course.objects.create_trial_course(self.user)
        trial_quiz = Quiz.objects.create_trial_quiz(trial_course, self.user)

    def test_questionpaper(self):
        """ Test question paper"""
        self.assertEqual(self.question_paper.quiz.description, 'demo quiz')
        self.assertSequenceEqual(self.question_paper.fixed_questions.all(),
                         [self.questions[3], self.questions[5]])
        self.assertTrue(self.question_paper.shuffle_questions)

    def test_update_total_marks(self):
        """ Test update_total_marks() method of Question Paper"""
        self.assertEqual(self.question_paper.total_marks, 0)
        self.question_paper.update_total_marks()
        self.assertEqual(self.question_paper.total_marks, 15)

    def test_get_random_questions(self):
        """ Test get_random_questions() method of Question Paper"""
        random_questions_set_1 = self.question_set_1.get_random_questions()
        random_questions_set_2 = self.question_set_2.get_random_questions()
        total_random_questions = len(random_questions_set_1 + \
            random_questions_set_2)
        self.assertEqual(total_random_questions, 5)

        # To check whether random questions are from random_question_set
        questions_set_1 = set(self.question_set_1.questions.all())
        random_set_1 = set(random_questions_set_1)
        random_set_2 = set(random_questions_set_2)
        boolean = questions_set_1.intersection(random_set_1) == random_set_1
        self.assertTrue(boolean)
        self.assertEqual(len(random_set_1), 2)
        # To check that the questions are random.
        # If incase not random then check that the order is diferent
        try:
            self.assertFalse(random_set_1 == random_set_2)
        except AssertionError:
            self.assertTrue(random_questions_set_1 != random_questions_set_2)

    def test_make_answerpaper(self):
        """ Test make_answerpaper() method of Question Paper"""
        already_attempted = self.attempted_papers.count()
        attempt_num = already_attempted + 1
        answerpaper = self.question_paper.make_answerpaper(self.user, self.ip,
                                                             attempt_num)
        self.assertIsInstance(answerpaper, AnswerPaper)
        paper_questions = answerpaper.questions.all()
        self.assertEqual(len(paper_questions), 7)
        fixed_questions = set(self.question_paper.fixed_questions.all())
        self.assertTrue(fixed_questions.issubset(set(paper_questions)))
        answerpaper.passed = True
        answerpaper.save()
        self.assertFalse(self.question_paper.is_prerequisite_passed(self.user))
        # test can_attempt_now(self):
        self.assertFalse(self.question_paper.can_attempt_now(self.user))

        def test_create_trial_paper_to_test_quiz(self):
            trial_paper = QuestionPaper.objects.create_trial_paper_to_test_quiz\
                                                (trial_quiz,
                                                 self.question_paper.id
                                                 )
            self.assertEqual(trial_paper.quiz, trial_quiz)
            self.assertEqual(trial_paper.fixed_questions.all(),
                             self.question_paper.fixed_questions.all()
                             )
            self.assertEqual(trial_paper.random_questions.all(),
                             self.question_paper.random_questions.all()
                             )

        def test_create_trial_paper_to_test_questions(self):
            trial_paper = QuestionPaper.objects.\
                             create_trial_paper_to_test_questions(
                                    trial_quiz, self.questions_list
                                    )
            self.assertEqual(trial_paper.quiz, trial_quiz)
            self.assertEqual(self.questions_list,
                             self.question_paper.fixed_questions
                             .values_list("id", flat=True)
                             )


###############################################################################
class AnswerPaperTestCases(unittest.TestCase):
    @classmethod
    def setUpClass(self):
        self.ip = '101.0.0.1'
        self.user = User.objects.get(id=1)
        self.profile = self.user.profile
        self.quiz = Quiz.objects.get(pk=1)
        self.question_paper = QuestionPaper(quiz=self.quiz, total_marks=3)
        self.question_paper.save()
        self.questions = Question.objects.filter(id__in=[1,2,3])
        self.start_time = timezone.now()
        self.end_time = self.start_time + timedelta(minutes=20)
        self.question1 = self.questions.get(id=1)
        self.question2 = self.questions.get(id=2)
        self.question3 = self.questions.get(id=3)

        # create answerpaper
        self.answerpaper = AnswerPaper(user=self.user,
            question_paper=self.question_paper,
            start_time=self.start_time,
            end_time=self.end_time,
            user_ip=self.ip
        )
        self.attempted_papers = AnswerPaper.objects.filter(
            question_paper=self.question_paper,
            user=self.user
        )
        already_attempted = self.attempted_papers.count()
        self.answerpaper.attempt_number = already_attempted + 1
        self.answerpaper.save()
        self.answerpaper.questions.add(*self.questions)
        self.answerpaper.questions_unanswered.add(*self.questions)
        self.answerpaper.save()
        # answers for the Answer Paper
        self.answer_right = Answer(question=Question.objects.get(id=1),
            answer="Demo answer",
            correct=True, marks=1
        )
        self.answer_wrong = Answer(question=Question.objects.get(id=2),
            answer="My answer",
            correct=False,
            marks=0
        )
        self.answer_right.save()
        self.answer_wrong.save()
        self.answerpaper.answers.add(self.answer_right)
        self.answerpaper.answers.add(self.answer_wrong)

        self.question1.language = 'python'
        self.question1.test_case_type = 'standardtestcase'
        self.question1.save()
        self.question2.language = 'python'
        self.question2.type = 'mcq'
        self.question2.test_case_type = 'mcqtestcase'
        self.question2.save()
        self.question3.language = 'python'
        self.question3.type = 'mcc'
        self.question3.test_case_type = 'mcqtestcase'
        self.question3.save()
        self.assertion_testcase = StandardTestCase(
            question=self.question1,
            test_case='assert add(1, 3) == 4',
            type = 'standardtestcase'

        )
        self.assertion_testcase.save()
        self.mcq_based_testcase = McqTestCase(
            options = 'a',
            question=self.question2,
            correct = True,
            type = 'mcqtestcase'

        )
        self.mcq_based_testcase.save()
        self.mcc_based_testcase = McqTestCase(
            question=self.question3,
            options = 'a',
            correct = True,
            type = 'mcqtestcase'
        )
        self.mcc_based_testcase.save()

    def test_validate_and_regrade_mcc_question(self):
        # Given
        mcc_answer = ['a']
        self.answer = Answer(question=self.question3,
            answer=mcc_answer,
        )
        self.answer.save()
        self.answerpaper.answers.add(self.answer)

        # When
        json_data = None
        correct, result = self.answerpaper.validate_answer(mcc_answer,
                self.question3, json_data)

        # Then
        self.assertTrue(correct)
        self.assertTrue(result['success'])
        self.assertEqual(result['error'], 'Correct answer')
        self.answer.correct = True
        self.answer.marks = 1

        # Given
        self.answer.correct = True
        self.answer.marks = 1

        self.answer.answer = ['a', 'b']
        self.answer.save()

        # When
        details = self.answerpaper.regrade(self.question3.id)

        # Then
        self.answer = self.answerpaper.answers.filter(question=self.question3).last()
        self.assertTrue(details[0])
        self.assertEqual(self.answer.marks, 0)
        self.assertFalse(self.answer.correct)

    def test_validate_and_regrade_mcq_question(self):
        # Given
        mcq_answer = 'a'
        self.answer = Answer(question=self.question2,
            answer=mcq_answer,
        )
        self.answer.save()
        self.answerpaper.answers.add(self.answer)

        # When
        json_data = None
        correct, result = self.answerpaper.validate_answer(mcq_answer,
                self.question2, json_data)

        # Then
        self.assertTrue(correct)
        self.assertTrue(result['success'])
        self.assertEqual(result['error'], 'Correct answer')
        self.answer.correct = True
        self.answer.marks = 1

        # Given
        self.answer.correct = True
        self.answer.marks = 1

        self.answer.answer = 'b'
        self.answer.save()

        # When
        details = self.answerpaper.regrade(self.question2.id)

        # Then
        self.answer = self.answerpaper.answers.filter(question=self.question2).last()
        self.assertTrue(details[0])
        self.assertEqual(self.answer.marks, 0)
        self.assertFalse(self.answer.correct)


    def test_answerpaper(self):
        """ Test Answer Paper"""
        self.assertEqual(self.answerpaper.user.username, 'demo_user')
        self.assertEqual(self.answerpaper.user_ip, self.ip)
        questions = self.answerpaper.get_questions()
        num_questions = len(questions)
        self.assertSequenceEqual(list(questions), list(self.questions))
        self.assertEqual(num_questions, 3)
        self.assertEqual(self.answerpaper.question_paper, self.question_paper)
        self.assertEqual(self.answerpaper.start_time, self.start_time)
        self.assertEqual(self.answerpaper.status, 'inprogress')

    def test_questions(self):
        # Test questions_left() method of Answer Paper
        self.assertEqual(self.answerpaper.questions_left(), 3)
        # Test current_question() method of Answer Paper
        current_question = self.answerpaper.current_question()
        self.assertEqual(current_question.id, 1)
        # Test completed_question() method of Answer Paper
        question = self.answerpaper.completed_question(1)
        self.assertEqual(self.answerpaper.questions_left(), 2)

        # Test next_question() method of Answer Paper
        current_question = self.answerpaper.current_question()
        self.assertEqual(current_question.id, 2)

        # When
        next_question_id = self.answerpaper.next_question(current_question.id)

        # Then
        self.assertTrue(next_question_id is not None)
        self.assertEqual(next_question_id.id, 3)

        # Given, here question is already answered
        current_question_id = 1

        # When
        next_question_id = self.answerpaper.next_question(current_question_id)

        # Then
        self.assertTrue(next_question_id is not None)
        self.assertEqual(next_question_id.id, 2)

        # Given, wrong question id
        current_question_id = 12

        # When
        next_question_id = self.answerpaper.next_question(current_question_id)

        # Then
        self.assertTrue(next_question_id is not None)
        self.assertEqual(next_question_id.id, 2)

        # Given, last question in the list
        current_question_id = 3

        # When
        next_question_id = self.answerpaper.next_question(current_question_id)

        # Then
        self.assertTrue(next_question_id is not None)
        self.assertEqual(next_question_id.id, 2)

        # Test get_questions_answered() method
        # When
        questions_answered = self.answerpaper.get_questions_answered()

        # Then
        self.assertEqual(questions_answered.count(), 1)
        self.assertSequenceEqual(questions_answered, [self.questions[0]])

        # When
        questions_unanswered = self.answerpaper.get_questions_unanswered()

        # Then
        self.assertEqual(questions_unanswered.count(), 2)
        self.assertSequenceEqual(questions_unanswered,
                                 [self.questions[1], self.questions[2]])

        # Test completed_question and next_question
        # When all questions are answered
        current_question = self.answerpaper.completed_question(2)

        # Then
        self.assertEqual(self.answerpaper.questions_left(), 1)
        self.assertEqual(current_question.id, 3)

        # When
        current_question = self.answerpaper.completed_question(3)

        # Then
        self.assertEqual(self.answerpaper.questions_left(), 0)
        self.assertTrue(current_question is None)

        # When
        next_question_id = self.answerpaper.next_question(current_question_id)

        # Then
        self.assertTrue(next_question_id is None)

    def test_update_marks(self):
        """ Test update_marks method of AnswerPaper"""
        self.answerpaper.update_marks('inprogress')
        self.assertEqual(self.answerpaper.status, 'inprogress')
        self.assertTrue(self.answerpaper.is_attempt_inprogress())
        self.answerpaper.update_marks()
        self.assertEqual(self.answerpaper.status, 'completed')
        self.assertEqual(self.answerpaper.marks_obtained, 1.0)
        self.assertEqual(self.answerpaper.percent, 33.33)
        self.assertTrue(self.answerpaper.passed)
        self.assertFalse(self.answerpaper.is_attempt_inprogress())

    def test_set_end_time(self):
        current_time = timezone.now()
        self.answerpaper.set_end_time(current_time)
        self.assertEqual(self.answerpaper.end_time,current_time)

    def test_get_question_answer(self):
        """ Test get_question_answer() method of Answer Paper"""
        answered = self.answerpaper.get_question_answers()
        first_answer = list(answered.values())[0][0]
        self.assertEqual(first_answer.answer, 'Demo answer')
        self.assertTrue(first_answer.correct)
        self.assertEqual(len(answered), 2)

    def test_is_answer_correct(self):
        self.assertTrue(self.answerpaper.is_answer_correct(self.questions[0]))
        self.assertFalse(self.answerpaper.is_answer_correct(self.questions[1]))

    def test_get_previous_answers(self):
        answers = self.answerpaper.get_previous_answers(self.questions[0])
        self.assertEqual(answers.count(), 1)
        self.assertTrue(answers[0], self.answer_right)
        answers = self.answerpaper.get_previous_answers(self.questions[1])
        self.assertEqual(answers.count(), 1)
        self.assertTrue(answers[0], self.answer_wrong)

    def test_set_marks (self):
        self.answer_wrong.set_marks(0.5)
        self.assertEqual(self.answer_wrong.marks, 0.5)
        self.answer_wrong.set_marks(10.0)
        self.assertEqual(self.answer_wrong.marks,1.0)


###############################################################################
class CourseTestCases(unittest.TestCase):
    def setUp(self):
        self.course = Course.objects.get(pk=1)
        self.creator = User.objects.get(pk=1)
        self.student1 = User.objects.get(pk=2)
        self.student2 = User.objects.get(pk=3)
        self.quiz1 = Quiz.objects.get(pk=1)
        self.quiz2 = Quiz.objects.get(pk=2)


    def test_is_creator(self):
        """ Test is_creator method of Course"""
        self.assertTrue(self.course.is_creator(self.creator))

    def test_is_self_enroll(self):
        """ Test is_self_enroll method of Course"""
        self.assertFalse(self.course.is_self_enroll())

    def test_deactivate(self):
        """ Test deactivate method of Course"""
        self.course.deactivate()
        self.assertFalse(self.course.active)

    def test_activate(self):
        """ Test activate method of Course"""
        self.course.activate()
        self.assertTrue(self.course.active)

    def test_request(self):
        """ Test request and get_requests methods of Course"""
        self.course.request(self.student1, self.student2)
        self.assertSequenceEqual(self.course.get_requests(),
                                 [self.student1, self.student2])

    def test_enroll_reject(self):
        """ Test enroll, reject, get_enrolled and get_rejected methods"""
        self.assertSequenceEqual(self.course.get_enrolled(), [])
        was_rejected = False
        self.course.enroll(was_rejected, self.student1)
        self.assertSequenceEqual(self.course.get_enrolled(), [self.student1])

        self.assertSequenceEqual(self.course.get_rejected(), [])
        was_enrolled = False
        self.course.reject(was_enrolled, self.student2)
        self.assertSequenceEqual(self.course.get_rejected(), [self.student2])

        was_rejected = True
        self.course.enroll(was_rejected, self.student2)
        self.assertSequenceEqual(self.course.get_enrolled(),
                                 [self.student1, self.student2])
        self.assertSequenceEqual(self.course.get_rejected(), [])

        was_enrolled = True
        self.course.reject(was_enrolled, self.student2)
        self.assertSequenceEqual(self.course.get_rejected(), [self.student2])
        self.assertSequenceEqual(self.course.get_enrolled(), [self.student1])

        self.assertTrue(self.course.is_enrolled(self.student1))

    def test_get_quizzes(self):
        """ Test get_quizzes method of Courses"""
        self.assertSequenceEqual(self.course.get_quizzes(),
                                     [self.quiz1, self.quiz2])

    def test_add_teachers(self):
        """ Test to add teachers to a course"""
        self.course.add_teachers(self.student1, self.student2)
        self.assertSequenceEqual(self.course.get_teachers(),
                                     [self.student1, self.student2])

    def test_remove_teachers(self):
        """ Test to remove teachers from a course"""
        self.course.add_teachers(self.student1, self.student2)
        self.course.remove_teachers(self.student1)
        self.assertSequenceEqual(self.course.get_teachers(), [self.student2])

    def test_is_teacher(self):
        """ Test to check if user is teacher"""
        self.course.add_teachers(self.student2)
        result = self.course.is_teacher(self.student2)
        self.assertTrue(result)

    def test_create_trial_course(self):
        """Test to check if trial course is created"""
        # Test for manager method create_trial_course
        trial_course = Course.objects.create_trial_course(self.creator)
        self.assertEqual(trial_course.name, "trial_course")
        self.assertEqual(trial_course.enrollment, "open")
        self.assertTrue(trial_course.active)
        self.assertEqual(trial_course.students.get(user=self.creator.id),
                         self.creator
                         )
        self.assertTrue(trial_course.is_trial)


###############################################################################
class TestCaseTestCases(unittest.TestCase):
    def setUp(self):
        self.user = User.objects.get(pk=1)
        self.question1 = Question(summary='Demo question 1',
            language='Python',
            type='Code',
            active=True,
            description='Write a function',
            points=1.0,
            test_case_type="standardtestcase",
            user=self.user,
            snippet='def myfunc()'
        )
        self.question2 = Question(summary='Demo question 2',
             language='Python',
             type='Code',
             active=True,
             description='Write to standard output',
             points=1.0,
             test_case_type="stdiobasedtestcase",
             user=self.user,
             snippet='def myfunc()'
        )
        self.question1.save()
        self.question2.save()
        self.assertion_testcase = StandardTestCase(
            question=self.question1,
            test_case='assert myfunc(12, 13) == 15',
            type='standardtestcase'
        )
        self.stdout_based_testcase = StdIOBasedTestCase(
            question=self.question2,
            expected_output='Hello World',
            type='standardtestcase'

        )
        self.assertion_testcase.save()
        self.stdout_based_testcase.save()
        answer_data = {'metadata': { 'user_answer': 'demo_answer',
                        'language': 'python',
                        'partial_grading': False
                        },
                    'test_case_data': [{'test_case': 'assert myfunc(12, 13) == 15',
                        'test_case_type': 'standardtestcase',
                        'weight': 1.0
                        }]
                    }
        self.answer_data_json = json.dumps(answer_data)

    def test_assertion_testcase(self):
        """ Test question """
        self.assertEqual(self.assertion_testcase.question, self.question1)
        self.assertEqual(self.assertion_testcase.test_case,
                             'assert myfunc(12, 13) == 15')

    def test_stdout_based_testcase(self):
        """ Test question """
        self.assertEqual(self.stdout_based_testcase.question, self.question2)
        self.assertEqual(self.stdout_based_testcase.expected_output,
            'Hello World'
        )

    def test_consolidate_answer_data(self):
        """ Test consolidate answer data model method """
        result = self.question1.consolidate_answer_data(
            user_answer="demo_answer"
        )
        actual_data = json.loads(result)
        exp_data = json.loads(self.answer_data_json)
        self.assertEqual(actual_data['metadata']['user_answer'], exp_data['metadata']['user_answer'])
        self.assertEqual(actual_data['test_case_data'], exp_data['test_case_data'])