code: def test_strappend(client):
      client.json().set("jsonkey", Path.root_path(), "foo")
      assert 6 == client.json().strappend("jsonkey", "bar")
      assert_resp_response(
          client,
          client.json().get("jsonkey", Path.root_path()),
          "foobar",
          [["foobar"]],
      )
  
imports: import pytest
  import redis
  from redis import Redis, exceptions
  from redis.commands.json.decoders import decode_list, unstring
  from redis.commands.json.path import Path
  from .conftest import _get_client, assert_resp_response, skip_ifmodversion_lt
label_desc: Use image node_id 16 for calling a global function with example usage: test_strappend(client) without return types