code: def test_host_unpacking_duplicate():
      with pytest.raises(ValueError):
          Client(host=f"http://localhost:1234", port=1234)
  
file_path: jina/tests/unit/clients/test_interface.py
imports: import pytest
  from jina import Client
  from jina.enums import ProtocolType
label_desc: Use image node_id 6 for calling a global function with example usage: test_host_unpacking_duplicate() without return types