code: def test_simple_encoding(self, r_no_decode):
      unicode_string = chr(3456) + "abcd" + chr(3421)
      r_no_decode["unicode-string"] = unicode_string.encode("utf-8")
      cached_val = r_no_decode["unicode-string"]
      assert isinstance(cached_val, bytes)
      assert unicode_string == cached_val.decode("utf-8")
  
imports: import pytest
  import redis
  from redis.connection import Connection
  from redis.utils import HIREDIS_PACK_AVAILABLE
  from .conftest import _get_client
label_desc: Use image node_id 3 for calling the TestEncoding obj's underlying member method code with example usage: obj.test_simple_encoding(r_no_decode) without return types