def _merge_result(self, command, res, **kwargs):
"""
`res` is a dict with the following structure Dict(NodeName, CommandResult)
"""
if command in self.result_callbacks:
return self.result_callbacks[command](res, **kwargs)
# Default way to handle result
return first_key(res)
def test_first_key_value_error():
with pytest.raises(ValueError):
first_key(None)
def test_first_key():
assert first_key({"foo": 1}) == 1
with pytest.raises(RedisClusterException) as ex:
first_key({"foo": 1, "bar": 2})
assert str(ex.value).startswith("More then 1 result from command")