def host_string(self):
        return '%s:%d' % (self._host, self._port)
Assert that passing a non-list is caught in allow headers.
dataset/ETHPy150Open pascalw/Airplayer/airplayer/mediabackends/base_media_backend.py/BaseMediaBackend.host_string--crossover with--dataset/ETHPy150Open openstack/oslo.middleware/oslo_middleware/tests/test_cors.py/CORSTestLatentProperties.test_invalid_latent_allow_headers