    def test_get_problem_responses_successful(self):
        """
        Test whether get_problem_responses returns an appropriate status
        message if CSV generation was started successfully.
        """
        url = reverse(
            'get_problem_responses',
            kwargs={'course_id': unicode(self.course.id)}
        )
        problem_location = ''

        response = self.client.get(url, {'problem_location': problem_location})
        res_json = json.loads(response.content)
        self.assertIn('status', res_json)
        status = res_json['status']
        self.assertIn('is being created', status)
        self.assertNotIn('already in progress', status)
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.