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, AssignmentUpload 
import json
import ruamel.yaml as yaml
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
from django.forms.models import model_to_dict
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')

    user4 = User.objects.create_user(username='demo_user4',
        password='demo',
        email='demo4@test.com'
    )
    Profile.objects.create(user=user4, roll_number=4, 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 1', 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 2', pass_criteria=40,
                        language='Python', prerequisite=quiz,
                        course=course, instructions="Demo Instructions")
    tmp_file1 = os.path.join(tempfile.gettempdir(), "test.txt")
    with open(tmp_file1, 'wb') as f:
        f.write('2'.encode('ascii'))


def tearDownModule():
    User.objects.all().delete()
    Question.objects.all().delete()
    Quiz.objects.all().delete()
    Course.objects.all().delete()
    QuestionPaper.objects.all().delete()


###############################################################################
class ProfileTestCases(unittest.TestCase):
    def setUp(self):
        self.user1 = User.objects.get(username="demo_user")
        self.profile = Profile.objects.get(user=self.user1)
        self.user2 = User.objects.get(username='demo_user3')

    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(username="demo_user")
        self.user2 = User.objects.get(username="demo_user2")
        self.question1 = Question.objects.create(summary='Demo Python 1',
            language='Python',
            type='Code',
            active=True,
            description='Write a function',
            points=1.0,
            snippet='def myfunc()',
            user=self.user1
        )

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

        # create a temp directory and add files for loading questions test
        file_path = os.path.join(tempfile.gettempdir(), "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")
        upload_file = open(file2, "r")
        django_file = File(upload_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",
                                        "test_case_args": "",
                                        "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": "Yaml Demo",
                           "tags": ['yaml_demo']
                           }]
        questions_data_with_missing_fields = [{"active": True,
                                               "points": 1.0,
                                               "description":\
                                                "factorial of a no",
                                               "language": "Python",
                                               "type": "Code",
                                               "testcase":\
                                                self.test_case_upload_data,
                                               "summary": "Yaml Demo 2"
                                               }]
        self.yaml_questions_data = yaml.safe_dump_all(questions_data)
        self.yaml_questions_data_with_missing_fields = yaml.safe_dump_all(
                questions_data_with_missing_fields
                )

    def tearDown(self):
        shutil.rmtree(self.load_tmp_path)
        shutil.rmtree(self.dump_tmp_path)
        uploaded_files = FileUpload.objects.all()
        que_id_list = [file.question.id for file in uploaded_files]
        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)
        uploaded_files.delete()

    def test_question(self):
        """ Test question """
        self.assertEqual(self.question1.summary, 'Demo Python 1')
        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 Yaml """
        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.yaml".format(tmp_path), "r") as f:
            questions = yaml.safe_load_all(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(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_with_all_fields(self):
        """ Test load questions into database from Yaml """
        question = Question()
        result = question.load_questions(self.yaml_questions_data, self.user1)
        question_data = Question.objects.get(summary="Yaml Demo")
        file = FileUpload.objects.get(question=question_data)
        test_case = question_data.get_test_cases()
        self.assertEqual(question_data.summary, 'Yaml 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)
        tags = question_data.tags.all().values_list("name",flat=True)
        self.assertListEqual(list(tags), ['yaml_demo'])
        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
                         )

    def test_load_questions_with_missing_fields(self):
        """ Test load questions into database from Yaml with
            missing fields like files, snippet and tags. """
        question = Question()
        result = question.load_questions(
                            self.yaml_questions_data_with_missing_fields,
                            self.user1
                            )
        question_data = Question.objects.get(summary="Yaml Demo 2")
        file = FileUpload.objects.filter(question=question_data)
        test_case = question_data.get_test_cases()
        self.assertEqual(question_data.summary,'Yaml Demo 2')
        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,'')
        self.assertListEqual(list(file),[])
        self.assertEqual([case.get_field_value() for case in test_case],
                         self.test_case_upload_data
                         )
        tags = question_data.tags.all().values_list("name",flat=True)
        self.assertListEqual(list(tags), [])

###############################################################################
class QuizTestCases(unittest.TestCase):
    def setUp(self):
        self.creator = User.objects.get(username="demo_user")
        self.teacher = User.objects.get(username="demo_user2")
        self.quiz1 = Quiz.objects.get(description='demo quiz 1')
        self.quiz2 = Quiz.objects.get(description='demo quiz 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 1')
        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_{}_godmode".format(self.quiz1.id)
                         )
        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_{}_usermode".format(self.quiz2.id))
        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(description="demo quiz 1")

        # create question paper with only fixed questions
        self.question_paper_fixed_questions = QuestionPaper.objects.create(
                quiz=self.quiz)
        self.question_paper_fixed_questions.fixed_questions.add(
                self.questions.get(id=1), self.questions.get(id=10))

        # create question paper with only random questions
        self.question_paper_random_questions = QuestionPaper.objects.create(
                quiz=self.quiz)
        self.question_set_random = QuestionSet.objects.create(marks=2,
            num_questions=2)
        self.question_set_random.questions.add(self.questions.get(id=3),
                self.questions.get(id=5), self.questions.get(id=7))
        self.question_paper_random_questions.random_questions.add(
                self.question_set_random)

        # create question paper with no questions
        self.question_paper_no_questions = QuestionPaper.objects.create(
                quiz=self.quiz)

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

        self.question_paper.fixed_question_order = "{0}, {1}".format(
                self.questions[3].id, self.questions[5].id
                )
        # 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(username="demo_user")

        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]
        self.trial_course = Course.objects.create_trial_course(self.user)
        self.trial_quiz = Quiz.objects.create_trial_quiz(self.trial_course, self.user)


    def test_get_question_bank(self):
        # Given
        ids = [4, 6, 7, 8, 9, 10, 12, 13, 14, 15]
        questions = list(Question.objects.filter(id__in=ids))
        # When
        question_bank = self.question_paper.get_question_bank()
        # Then
        self.assertSequenceEqual(questions, question_bank)

        # Given
        ids = [1, 10]
        questions = list(Question.objects.filter(id__in=ids))
        # When
        question_bank = self.question_paper_fixed_questions.get_question_bank()
        # Then
        self.assertSequenceEqual(questions, question_bank)

        # Given
        ids = [3, 5, 7]
        questions = list(Question.objects.filter(id__in=ids))
        # When
        question_bank = self.question_paper_random_questions.get_question_bank()
        # Then
        self.assertSequenceEqual(questions, question_bank)

        # Given
        questions = []
        # When
        question_bank = self.question_paper_no_questions.get_question_bank()
        # Then
        self.assertSequenceEqual(questions, question_bank)

    def test_questionpaper(self):
        """ Test question paper"""
        self.assertEqual(self.question_paper.quiz.description, 'demo quiz 1')
        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))
        # trying to create an answerpaper with same parameters passed.
        answerpaper2 = self.question_paper.make_answerpaper(self.user, self.ip,
                                                             attempt_num)
        # check if make_answerpaper returned an object instead of creating one.
        self.assertEqual(answerpaper, answerpaper2)



    def test_create_trial_paper_to_test_quiz(self):
        qu_list = [str(self.questions_list[0]), str(self.questions_list[1])]
        trial_paper = QuestionPaper.objects.create_trial_paper_to_test_quiz\
                                            (self.trial_quiz,
                                             self.quiz.id
                                             )
        trial_paper.random_questions.add(self.question_set_1)
        trial_paper.random_questions.add(self.question_set_2)
        trial_paper.fixed_question_order = ",".join(qu_list)
        self.assertEqual(trial_paper.quiz, self.trial_quiz)
        self.assertSequenceEqual(trial_paper.get_ordered_questions(),
                         self.question_paper.get_ordered_questions()
                         )
        trial_paper_ran = [q_set.id for q_set in
                           trial_paper.random_questions.all()]
        qp_ran = [q_set.id for q_set in
                  self.question_paper.random_questions.all()]

        self.assertSequenceEqual(trial_paper_ran, qp_ran)

    def test_create_trial_paper_to_test_questions(self):
        qu_list = [str(self.questions_list[0]), str(self.questions_list[1])]
        trial_paper = QuestionPaper.objects.\
                         create_trial_paper_to_test_questions(
                                self.trial_quiz, qu_list
                                )
        self.assertEqual(trial_paper.quiz, self.trial_quiz)
        fixed_q = self.question_paper.fixed_questions.values_list(
            'id', flat=True)
        self.assertSequenceEqual(self.questions_list, fixed_q)

    def test_fixed_order_questions(self):
        fixed_ques = self.question_paper.get_ordered_questions()
        actual_ques = [self.questions[3], self.questions[5]]
        self.assertSequenceEqual(fixed_ques, actual_ques)


###############################################################################
class AnswerPaperTestCases(unittest.TestCase):
    @classmethod
    def setUpClass(self):
        self.ip = '101.0.0.1'
        self.user = User.objects.get(username='demo_user')
        self.user2 = User.objects.get(username='demo_user2')
        self.profile = self.user.profile
        self.quiz = Quiz.objects.get(description='demo quiz 1')
        self.question_paper = QuestionPaper(quiz=self.quiz, total_marks=3)
        self.question_paper.save()
        self.quiz2 = Quiz.objects.get(description='demo quiz 2')
        self.qtn_paper_with_single_question = QuestionPaper(
            quiz=self.quiz2, total_marks=3
        )
        self.qtn_paper_with_single_question.save()

        all_questions = Question.objects.all()
        self.questions = all_questions[0:3]
        self.start_time = timezone.now()
        self.end_time = self.start_time + timedelta(minutes=20)
        self.question1 = all_questions[0]
        self.question2 = all_questions[1]
        self.question3 = all_questions[2]
        self.question4 = all_questions[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
        )
        self.question_paper.fixed_questions.add(*self.questions)
        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=self.question1,
            answer="Demo answer",
            correct=True, marks=1,
            error=json.dumps([])
        )
        self.answer_wrong = Answer(question=self.question2,
            answer="My answer",
            correct=False,
            marks=0,
            error=json.dumps(['error1', 'error2'])
        )
        self.answer_correct = Answer(question=self.question4,
            answer="correct answer",
            correct=True, marks=1,
            error=json.dumps([])
        )
        self.answer_right.save()
        self.answer_wrong.save()
        self.answer_correct.save()
        self.answerpaper.answers.add(self.answer_right)
        self.answerpaper.answers.add(self.answer_wrong)
        self.answerpaper.answers.add(self.answer_correct)

        self.answer1 = Answer.objects.create(
            question=self.question1,
            answer="answer1", correct=False, error=json.dumps([])
        )
        self.answerpaper.answers.add(self.answer1)

        # create an answerpaper with only one question
        self.answerpaper_single_question = 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
        )
        self.qtn_paper_with_single_question.fixed_questions.add(self.question4)
        already_attempted = self.attempted_papers.count()
        self.answerpaper_single_question.attempt_number = already_attempted + 1
        self.answerpaper_single_question.save()
        self.answerpaper_single_question.questions.add(self.question4)
        self.answerpaper_single_question.questions_unanswered.add(self.question4)
        self.answerpaper_single_question.save()
        # answers for the Answer Paper
        self.single_answer = Answer(question=self.question4,
            answer="Demo answer",
            correct=True, marks=1,
            error=json.dumps([])
        )
        self.single_answer.save()
        self.answerpaper.answers.add(self.single_answer)

        self.question1.language = 'python'
        self.question1.test_case_type = 'standardtestcase'
        self.question1.summary = "Question1"
        self.question1.save()
        self.question2.language = 'python'
        self.question2.type = 'mcq'
        self.question2.test_case_type = 'mcqtestcase'
        self.question2.summary = "Question2"
        self.question2.save()
        self.question3.language = 'python'
        self.question3.type = 'mcc'
        self.question3.test_case_type = 'mcqtestcase'
        self.question3.summary = "Question3"
        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()

        # Setup quiz where questions are shuffled
        # Create Quiz and Question Paper
        self.quiz2 = Quiz.objects.get(description="demo quiz 2")
        self.question_paper2 = QuestionPaper(
            quiz=self.quiz2, total_marks=3, shuffle_questions=True)
        self.question_paper2.save()
        summary_list = ['Q%d' % (i) for i in range(1, 21)]
        self.que_list = Question.objects.filter(summary__in=summary_list)
        self.question_paper2.fixed_questions.add(*self.que_list)

        # Create AnswerPaper for user1 and user2
        self.user1_answerpaper = self.question_paper2.make_answerpaper(
            self.user, self.ip, 1
        )
        self.user2_answerpaper = self.question_paper2.make_answerpaper(
            self.user2, self.ip, 1
        )

        self.user2_answerpaper2 = self.question_paper.make_answerpaper(
            self.user2, self.ip, 1
        )

    def test_get_per_question_score(self):
        # Given
        question_id = self.question4.id
        expected_score = 1
        # When
        score = self.answerpaper.get_per_question_score(question_id)
        # Then
        self.assertEqual(score, expected_score)

        # Given
        question_id = self.question2.id
        expected_score = 0
        # When
        score = self.answerpaper.get_per_question_score(question_id)
        # Then
        self.assertEqual(score, expected_score)

        # Given
        question_id = 131
        expected_score = 'NA'
        # When
        score = self.answerpaper.get_per_question_score(question_id)
        # Then
        self.assertEqual(score, expected_score)

    def test_returned_question_is_not_none(self):
        # Test add_completed_question and next_question
        # When all questions are answered

        # Before questions are answered
        self.assertEqual(self.answerpaper_single_question.questions_left(), 1)

        current_question = self.answerpaper_single_question.add_completed_question(
            self.question4.id
        )


        # Then
        self.assertEqual(
            self.answerpaper_single_question.questions_answered.all()[0],
            self.question4
        )
        self.assertEqual(self.answerpaper_single_question.questions_left(), 0)
        self.assertIsNotNone(current_question)
        self.assertEqual(current_question.summary, "Q4")

        # When
        next_question = self.answerpaper_single_question.next_question(
            self.question4.id
        )

        # Then
        self.assertEqual(self.answerpaper_single_question.questions_left(), 0)
        self.assertIsNotNone(next_question)
        self.assertEqual(next_question.summary, "Q4")

        # When
        current_question = self.answerpaper_single_question.get_current_question(
            self.answerpaper_single_question.questions.all()
        )

        # Then
        self.assertEqual(self.answerpaper_single_question.questions_left(), 0)
        self.assertIsNotNone(current_question)
        self.assertEqual(current_question.summary, "Q4")

    def test_validate_and_regrade_mcc_correct_answer(self):
        # Given
        mcc_answer = [str(self.mcc_based_testcase.id)]
        self.answer = Answer(question=self.question3,
                             answer=mcc_answer,
                             )
        self.answer.save()
        self.answerpaper.answers.add(self.answer)

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

        # Then
        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_correct_answer(self):
        # Given
        mcq_answer = str(self.mcq_based_testcase.id)
        self.answer = Answer(question=self.question2,
            answer=mcq_answer,
        )
        self.answer.save()
        self.answerpaper.answers.add(self.answer)

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

        # Then
        self.assertTrue(result['success'])
        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_mcq_incorrect_answer(self):
        # Given
        mcq_answer = 'b'
        self.answer = Answer(question=self.question2,
            answer=mcq_answer,
        )
        self.answer.save()
        self.answerpaper.answers.add(self.answer)

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

        # Then
        self.assertFalse(result['success'])

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

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

        # Then
        self.assertFalse(result['success'])

    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.summary, "Question1")
        # Test completed_question() method of Answer Paper

        question = self.answerpaper.add_completed_question(self.question1.id)
        self.assertIsNotNone(question)
        self.assertEqual(self.answerpaper.questions_left(), 2)

        # Test next_question() method of Answer Paper
        current_question = self.answerpaper.current_question()
        self.assertEqual(current_question.summary, "Question2")

        # 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.summary, "Question3")

        # Given, here question is already answered
        current_question_id = self.question1.id

        # 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.summary, "Question2")

        # 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.summary, "Question1")

        # Given, last question in the list
        current_question_id = self.question3.id

        # 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.summary, "Question1")

        # 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.add_completed_question(
            self.question2.id
        )

        # Then
        self.assertEqual(self.answerpaper.questions_left(), 1)
        self.assertIsNotNone(current_question)
        self.assertEqual(current_question.summary, "Question3")

        # When
        current_question = self.answerpaper.add_completed_question(
                                            self.question3.id
                                            )

        # Then
        self.assertEqual(self.answerpaper.questions_left(), 0)
        self.assertIsNotNone(current_question)
        self.assertTrue(current_question == self.answerpaper.questions.all()[0])

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

        # Then
        all_questions = self.questions.all()
        self.assertTrue(next_question_id == all_questions[0])

    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]
        first_answer_obj = first_answer['answer']
        self.assertEqual(first_answer_obj.answer, 'Demo answer')
        self.assertTrue(first_answer_obj.correct)
        self.assertEqual(len(answered), 3)

    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(), 2)
        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)

    def test_get_latest_answer(self):
        latest_answer = self.answerpaper.get_latest_answer(self.question1.id)
        self.assertEqual(latest_answer.id, self.answer1.id)
        self.assertEqual(latest_answer.answer, "answer1")

    def test_shuffle_questions(self):
        ques_set_1 = self.user1_answerpaper.get_all_ordered_questions()
        ques_set_2 = self.user2_answerpaper.get_all_ordered_questions()
        self.assertFalse(ques_set_1 == ques_set_2)

    def test_validate_current_question(self):
        self.user2_answerpaper2.questions_unanswered.remove(*self.questions)
        self.assertEqual(self.user2_answerpaper2.current_question(),
                         self.question1)


###############################################################################
class CourseTestCases(unittest.TestCase):
    def setUp(self):
        self.course = Course.objects.get(name="Python Course")
        self.creator = User.objects.get(username="demo_user")
        self.template_course_user = User.objects.get(username="demo_user4")
        self.student1 = User.objects.get(username="demo_user2")
        self.student2 = User.objects.get(username="demo_user3")
        self.quiz1 = Quiz.objects.get(description='demo quiz 1')
        self.quiz2 = Quiz.objects.get(description='demo quiz 2')
        self.questions = Question.objects.filter(active=True)

        # create courses with disabled enrollment
        self.enroll_request_course = Course.objects.create(
            name="Enrollment Request Course With Enrollment Disabled",
            enrollment="Enroll Request",
            creator=self.creator,
            start_enroll_time=datetime(2015, 10, 9, 10, 8, 15, 0,
                tzinfo=pytz.utc
            ),
            end_enroll_time=datetime(2015, 11, 9, 10, 8, 15, 0,
               tzinfo=pytz.utc
            ),
        )
        self.open_course = Course.objects.create(
            name="Open Course With Enrollment Disabled",
            enrollment="Open Course",
            creator=self.creator,
            start_enroll_time=datetime(2015, 10, 9, 10, 8, 15, 0,
                tzinfo=pytz.utc
            ),
            end_enroll_time=datetime(2015, 11, 9, 10, 8, 15, 0,
               tzinfo=pytz.utc
            ),
        )

        # create a course that will be cloned
        self.template_course = Course.objects.create(
            name="Template Course to clone",
            enrollment="Open Course",
            creator=self.creator,
            start_enroll_time=datetime(2015, 10, 9, 10, 8, 15, 0,
                tzinfo=pytz.utc
            ),
            end_enroll_time=datetime(2015, 11, 9, 10, 8, 15, 0,
               tzinfo=pytz.utc
            ),
        )

        self.template_quiz = 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='template quiz 1',
            pass_criteria=40,
            language='Python',
            course=self.template_course,
            instructions="Demo Instructions"
        )

        self.template_question_paper = QuestionPaper.objects.create(
            quiz=self.template_quiz,
            total_marks=0.0,
            shuffle_questions=True
        )

        self.template_question_paper.fixed_questions.add(self.questions[1],
            self.questions[2],
            self.questions[3]
        )

        self.template_quiz2 = 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='template quiz 2',
            pass_criteria=0,
            language='Python',
            prerequisite=self.template_quiz,
            course=self.template_course,
            instructions="Demo Instructions"
        )

        self.template_question_paper2 = QuestionPaper.objects.create(
            quiz=self.template_quiz2,
            total_marks=0.0,
            shuffle_questions=True
        )

        self.template_question_paper2.fixed_questions.add(self.questions[1],
            self.questions[2],
            self.questions[3]
        )

    def test_create_duplicate_course(self):
        """ Test create_duplicate_course method of course """
        # create a duplicate course
        cloned_course = self.template_course.create_duplicate_course(
            self.template_course_user
        )
        self.assertEqual(cloned_course.name,
            'Copy Of Template Course to clone')
        self.assertEqual(cloned_course.enrollment,
            self.template_course.enrollment
        )
        self.assertEqual(cloned_course.creator,
            self.template_course_user
        )
        self.assertEqual(cloned_course.start_enroll_time,
            self.template_course.start_enroll_time
        )
        self.assertEqual(cloned_course.end_enroll_time,
            self.template_course.end_enroll_time
        )

        # check if attributes are same
        cloned_course_dict = model_to_dict(cloned_course,
            fields=[field.name for field in cloned_course._meta.fields \
                if field.name != 'id']
        )
        template_course_dict = model_to_dict(self.template_course,
            fields=[field.name for field in self.template_course._meta.fields \
                if field.name != 'id']
        )
        self.assertEqual(cloned_course_dict, template_course_dict)

        # get duplicate quiz associated with duplicate course
        cloned_quiz = cloned_course.quiz_set.all()[0]

        self.assertEqual(cloned_quiz.start_date_time,
            self.template_quiz.start_date_time
        )
        self.assertEqual(cloned_quiz.end_date_time,
            self.template_quiz.end_date_time
        )
        self.assertEqual(cloned_quiz.duration,
            self.template_quiz.duration
        )
        self.assertEqual(cloned_quiz.active,
            self.template_quiz.active
        )
        self.assertEqual(cloned_quiz.attempts_allowed,
            self.template_quiz.attempts_allowed
        )
        self.assertEqual(cloned_quiz.time_between_attempts,
            self.template_quiz.time_between_attempts
        )
        self.assertEqual(cloned_quiz.description,
            'Copy Of template quiz 1'
        )
        self.assertEqual(cloned_quiz.pass_criteria,
            self.template_quiz.pass_criteria
        )
        self.assertEqual(cloned_quiz.language,
            self.template_quiz.language
        )
        self.assertEqual(cloned_quiz.course,
            cloned_course
        )
        self.assertEqual(cloned_quiz.instructions,
            self.template_quiz.instructions
        )

        # Get duplicate questionpaper associated with duplicate quiz
        cloned_qp = cloned_quiz.questionpaper_set.all()[0]

        self.assertEqual(cloned_qp.quiz, cloned_quiz)
        self.assertEqual(cloned_qp.total_marks,
            self.template_question_paper.total_marks
        )
        self.assertEqual(cloned_qp.shuffle_questions,
            self.template_question_paper.shuffle_questions
        )

        for q in cloned_qp.fixed_questions.all():
            self.assertIn(q, self.template_question_paper.fixed_questions.all())

        # get second duplicate quiz associated with duplicate course
        cloned_quiz = cloned_course.quiz_set.all()[1]

        self.assertEqual(cloned_quiz.start_date_time,
            self.template_quiz2.start_date_time
        )
        self.assertEqual(cloned_quiz.end_date_time,
            self.template_quiz2.end_date_time
        )
        self.assertEqual(cloned_quiz.duration,
            self.template_quiz2.duration
        )
        self.assertEqual(cloned_quiz.active,
            self.template_quiz2.active
        )
        self.assertEqual(cloned_quiz.attempts_allowed,
            self.template_quiz2.attempts_allowed
        )
        self.assertEqual(cloned_quiz.time_between_attempts,
            self.template_quiz2.time_between_attempts
        )
        self.assertEqual(cloned_quiz.description,
            'Copy Of template quiz 2'
        )
        self.assertEqual(cloned_quiz.pass_criteria,
            self.template_quiz2.pass_criteria
        )
        self.assertEqual(cloned_quiz.language,
            self.template_quiz2.language
        )
        self.assertEqual(cloned_quiz.course,
            cloned_course
        )
        self.assertEqual(cloned_quiz.instructions,
            self.template_quiz2.instructions
        )

        # Get second duplicate questionpaper associated with duplicate quiz
        cloned_qp = cloned_quiz.questionpaper_set.all()[0]

        self.assertEqual(cloned_qp.quiz, cloned_quiz)
        self.assertEqual(cloned_qp.total_marks,
            self.template_question_paper2.total_marks
        )
        self.assertEqual(cloned_qp.shuffle_questions,
            self.template_question_paper2.shuffle_questions
        )

        for q in cloned_qp.fixed_questions.all():
            self.assertIn(q, self.template_question_paper2.fixed_questions.all())


    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"""
        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(self.creator, trial_course.creator)
        self.assertIn(self.creator, trial_course.students.all())
        self.assertTrue(trial_course.is_trial)

    def test_enabled_enrollment_for_course(self):
        """Test to check enrollment is closed for open course"""
        self.assertTrue(self.course.is_active_enrollment())

    def test_disabled_enrollment_for_open_course(self):
        """Test to check enrollment is closed for open course"""
        self.assertFalse(self.open_course.is_active_enrollment())

    def test_disabled_enrollment_for_enroll_request_course(self):
        """Test to check enrollment is closed for open course"""
        self.assertFalse(self.enroll_request_course.is_active_enrollment())



###############################################################################
class TestCaseTestCases(unittest.TestCase):
    def setUp(self):
        self.user = User.objects.get(username="demo_user")
        self.question1 = Question(summary='Demo question 1',
            language='Python',
            type='Code',
            active=True,
            description='Write a function',
            points=1.0,
            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,
             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',
                        'test_case_args': "",
                        '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'])


class AssignmentUploadTestCases(unittest.TestCase):
    def setUp(self):
        self.user1 = User.objects.get(username="demo_user")
        self.user1.first_name = "demo"
        self.user1.last_name = "user"
        self.user1.save()
        self.user2 = User.objects.get(username="demo_user3")
        self.user2.first_name = "demo"
        self.user2.last_name = "user3"
        self.user2.save()
        self.quiz = Quiz.objects.get(description="demo quiz 1")

        self.questionpaper = QuestionPaper.objects.create(quiz=self.quiz,
            total_marks=0.0,
            shuffle_questions=True
        )
        self.question = Question.objects.create(summary='Assignment',
            language='Python',
            type='upload',
            active=True,
            description='Upload a file',
            points=1.0,
            snippet='',
            user=self.user1
        )
        self.questionpaper.fixed_question_order = "{0}".format(self.question.id)
        self.questionpaper.fixed_questions.add(self.question)
        file_path1 = os.path.join(tempfile.gettempdir(), "upload1.txt")
        file_path2 = os.path.join(tempfile.gettempdir(), "upload2.txt")
        self.assignment1 = AssignmentUpload.objects.create(user=self.user1,
            assignmentQuestion=self.question, assignmentFile=file_path1,
            question_paper=self.questionpaper
            )
        self.assignment2 = AssignmentUpload.objects.create(user=self.user2,
            assignmentQuestion=self.question, assignmentFile=file_path2,
            question_paper=self.questionpaper
            )

    def test_get_assignments_for_user_files(self):
        assignment_files, file_name = AssignmentUpload.objects.get_assignments(
                                    self.questionpaper, self.question.id,
                                    self.user1.id
                                    )
        self.assertIn("upload1.txt", assignment_files[0].assignmentFile.name)
        self.assertEqual(assignment_files[0].user, self.user1)
        actual_file_name = self.user1.get_full_name().replace(" ", "_")
        file_name = file_name.replace(" ", "_")
        self.assertEqual(file_name, actual_file_name)

    def test_get_assignments_for_quiz_files(self):
        assignment_files, file_name = AssignmentUpload.objects.get_assignments(
                                    self.questionpaper
                                    )
        files = [os.path.basename(file.assignmentFile.name)
                 for file in assignment_files]
        question_papers = [file.question_paper for file in assignment_files]
        self.assertIn("upload1.txt", files)
        self.assertIn("upload2.txt", files)
        self.assertEqual(question_papers[0].quiz, self.questionpaper.quiz)
        actual_file_name = self.quiz.description.replace(" ", "_")
        file_name = file_name.replace(" ", "_")
        self.assertIn(actual_file_name, file_name)