'Test the grade for a user who has not answered any test.'

def test_no_grade(self):

    resp = self.client.get(self.get_url(self.student.username))
    self.assertEqual(resp.status_code, status.HTTP_200_OK)
    expected_data = [{'username': self.student.username, 'letter_grade': None, 'percent': 0.0, 'course_key': str(self.course_key), 'passed': False}]
    self.assertEqual(resp.data, expected_data)
