'Tests the sad path :('

def test_delete_asset_with_invalid_asset(self):

    test_url = reverse_course_url('assets_handler', self.course.id, kwargs={'asset_key_string': unicode('/c4x/edX/toy/asset/invalid.pdf')})
    resp = self.client.delete(test_url, HTTP_ACCEPT='application/json')
    self.assertEquals(resp.status_code, 404)
