local_redis = <pytest_redis.executor.RedisExecutor: "/usr/bin/r..." 0x7f5e88335e80> tmp_path = PosixPath('/tmp/pytest-of-jenkins/pytest-0/test_server_metrics0') monkeypatch = <_pytest.monkeypatch.MonkeyPatch object at 0x7f5e8838e668> def test_server_metrics(local_redis, tmp_path, monkeypatch): """Test the metrics generation""" rc = RedisClient(host=local_redis.host, port=local_redis.port) data = { "col1": 1, "col2": 4, "col3": 6, "col4": 10, } for coll in data.keys(): for i in range(0, data[coll]): rc.pfadd(coll, i) cfg = { "counters": {"cls": "redis", "host": f"{local_redis.host}:{local_redis.port}"} } _environment_config_file(tmp_path, monkeypatch, cfg) > app = make_app_from_configfile() .tox/py3/lib/python3.7/site-packages/swh/counters/tests/test_server.py:124: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ .tox/py3/lib/python3.7/site-packages/swh/counters/api/server.py:92: in make_app_from_configfile app = make_app(api_cfg) _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ config = {'counters': {'cls': 'redis', 'host': '127.0.0.1:23836'}} def make_app(config: Dict[str, Any]) -> RPCServerApp: """Initialize the remote api application. """ app = RPCServerApp( __name__, backend_class=CountersInterface, backend_factory=lambda: get_counters(**config["counters"]), ) > app.add_backend_class( backend_class=HistoryInterface, backend_factory=lambda: get_history(**config["history"]), ) E AttributeError: 'RPCServerApp' object has no attribute 'add_backend_class' .tox/py3/lib/python3.7/site-packages/swh/counters/api/server.py:29: AttributeError