def test_courseware_page_unfulfilled_prereqs(self):
        """
        Test courseware access when a course has pre-requisite course yet to be completed
        """
        seed_milestone_relationship_types()
        pre_requisite_course = CourseFactory.create(org="edX", course="900", run="test_run")

        pre_requisite_courses = [unicode(pre_requisite_course.id)]
        course = CourseFactory.create(
            org="edX", course="1000", run="test_run", pre_requisite_courses=pre_requisite_courses
        )
        set_prerequisite_courses(course.id, pre_requisite_courses)

        test_password = "t3stp4ss.!"
        user = UserFactory.create()
        user.set_password(test_password)
        user.save()
        self.login(user.email, test_password)
        CourseEnrollmentFactory(user=user, course_id=course.id)

        url = reverse("courseware", args=[unicode(course.id)])
        response = self.client.get(url)
        self.assertRedirects(response, reverse("dashboard"))
        self.assertEqual(response.status_code, 302)

        fulfill_course_milestone(pre_requisite_course.id, user)
        response = self.client.get(url)
        self.assertEqual(response.status_code, 200)

    def setUp(self):
        super(CourseOverviewAccessTestCase, self).setUp()

        today = datetime.datetime.now(pytz.UTC)
        last_week = today - datetime.timedelta(days=7)
        next_week = today + datetime.timedelta(days=7)

        self.course_default = CourseFactory.create()
        self.course_started = CourseFactory.create(start=last_week)
        self.course_not_started = CourseFactory.create(start=next_week, days_early_for_beta=10)
        self.course_staff_only = CourseFactory.create(visible_to_staff_only=True)
        self.course_mobile_available = CourseFactory.create(mobile_available=True)
        self.course_with_pre_requisite = CourseFactory.create(
            pre_requisite_courses=[str(self.course_started.id)]
        )
        self.course_with_pre_requisites = CourseFactory.create(
            pre_requisite_courses=[str(self.course_started.id), str(self.course_not_started.id)]
        )

        self.user_normal = UserFactory.create()
        self.user_beta_tester = BetaTesterFactory.create(course_key=self.course_not_started.id)
        self.user_completed_pre_requisite = UserFactory.create()
        fulfill_course_milestone(self.user_completed_pre_requisite, self.course_started.id)
        self.user_staff = UserFactory.create(is_staff=True)
        self.user_anonymous = AnonymousUserFactory.create()

    def test_access_on_course_with_pre_requisites(self):
        """
        Test course access when a course has pre-requisite course yet to be completed
        """
        seed_milestone_relationship_types()
        user = UserFactory.create()

        pre_requisite_course = CourseFactory.create(org="test_org", number="788", run="test_run")

        pre_requisite_courses = [unicode(pre_requisite_course.id)]
        course = CourseFactory.create(
            org="test_org", number="786", run="test_run", pre_requisite_courses=pre_requisite_courses
        )
        set_prerequisite_courses(course.id, pre_requisite_courses)

        # user should not be able to load course even if enrolled
        CourseEnrollmentFactory(user=user, course_id=course.id)
        response = access._has_access_course_desc(user, "view_courseware_with_prerequisites", course)
        self.assertFalse(response)
        self.assertIsInstance(response, access_response.MilestoneError)
        # Staff can always access course
        staff = StaffFactory.create(course_key=course.id)
        self.assertTrue(access._has_access_course_desc(staff, "view_courseware_with_prerequisites", course))

        # User should be able access after completing required course
        fulfill_course_milestone(pre_requisite_course.id, user)
        self.assertTrue(access._has_access_course_desc(user, "view_courseware_with_prerequisites", course))

    def test_access_on_course_with_pre_requisites(self):
        """
        Test course access when a course has pre-requisite course yet to be completed
        """
        user = UserFactory.create()

        pre_requisite_course = CourseFactory.create(
            org='test_org', number='788', run='test_run'
        )

        pre_requisite_courses = [unicode(pre_requisite_course.id)]
        course = CourseFactory.create(
            org='test_org', number='786', run='test_run', pre_requisite_courses=pre_requisite_courses
        )
        set_prerequisite_courses(course.id, pre_requisite_courses)

        # user should not be able to load course even if enrolled
        CourseEnrollmentFactory(user=user, course_id=course.id)
        response = access._has_access_course(user, 'load', course)
        self.assertFalse(response)
        self.assertIsInstance(response, access_response.MilestoneAccessError)
        # Staff can always access course
        staff = StaffFactory.create(course_key=course.id)
        self.assertTrue(access._has_access_course(staff, 'load', course))

        # User should be able access after completing required course
        fulfill_course_milestone(pre_requisite_course.id, user)
        self.assertTrue(access._has_access_course(user, 'load', course))

def handle_post_cert_generated(sender, instance, **kwargs):  # pylint: disable=no-self-argument, unused-argument
    """
    Handles post_save signal of GeneratedCertificate, and mark user collected
    course milestone entry if user has passed the course
    or certificate status is 'generating'.
    """
    if settings.FEATURES.get('ENABLE_PREREQUISITE_COURSES') and instance.status == CertificateStatuses.generating:
        fulfill_course_milestone(instance.course_id, instance.user)

 def test_fulfilled_prerequisite_course(self):
     """
     Tests the case when a user fulfills existing pre-requisite course
     """
     self._add_prerequisite_course()
     add_prerequisite_course(self.course.id, self.prereq_course.id)
     fulfill_course_milestone(self.prereq_course.id, self.user)
     self.init_course_access()
     self.api_response()

def handle_post_cert_generated(sender, instance, **kwargs):  # pylint: disable=unused-argument
    """
    Handles post_save signal of GeneratedCertificate, and mark user collected
    course milestone entry if user has passed the course.
    User is assumed to have passed the course if certificate status is either 'generating' or 'downloadable'.
    """
    allowed_cert_states = [CertificateStatuses.generating, CertificateStatuses.downloadable]
    if is_prerequisite_courses_enabled() and instance.status in allowed_cert_states:
        fulfill_course_milestone(instance.course_id, instance.user)

def handle_post_cert_generated(sender, instance, **kwargs):  # pylint: disable=no-self-argument, unused-argument
    """
    Handles post_save signal of GeneratedCertificate, and mark user collected
    course milestone entry if user has passed the course.
    User is assumed to have passed the course if certificate status is either 'generating' or 'downloadable'.
    """
    allowed_cert_states = [CertificateStatuses.generating, CertificateStatuses.downloadable]
    if settings.FEATURES.get('ENABLE_PREREQUISITE_COURSES') and instance.status in allowed_cert_states:
        fulfill_course_milestone(instance.course_id, instance.user)

    def test_courseware_page_unfulfilled_prereqs(self):
        """
        Test courseware access when a course has pre-requisite course yet to be completed
        """
        pre_requisite_course = CourseFactory.create(
            org='edX',
            course='900',
            run='test_run',
        )

        pre_requisite_courses = [unicode(pre_requisite_course.id)]
        course = CourseFactory.create(
            org='edX',
            course='1000',
            run='test_run',
            pre_requisite_courses=pre_requisite_courses,
        )
        set_prerequisite_courses(course.id, pre_requisite_courses)

        test_password = 't3stp4ss.!'
        user = UserFactory.create()
        user.set_password(test_password)
        user.save()
        self.login(user.email, test_password)
        CourseEnrollmentFactory(user=user, course_id=course.id)

        url = reverse('courseware', args=[unicode(course.id)])
        response = self.client.get(url)
        self.assertRedirects(
            response,
            reverse(
                'dashboard'
            )
        )
        self.assertEqual(response.status_code, 302)

        fulfill_course_milestone(pre_requisite_course.id, user)
        response = self.client.get(url)
        self.assertEqual(response.status_code, 200)

def handle_course_cert_awarded(sender, user, course_key, **kwargs):  # pylint: disable=unused-argument
    """
    Mark a milestone entry if user has passed the course.
    """
    if is_prerequisite_courses_enabled():
        fulfill_course_milestone(course_key, user)