code: def test_cpr_response(processor, stream):
      stream.feed("a\x1b[40;10Rb")
      assert len(processor.keys) == 3
      assert processor.keys[0].key == "a"
      assert processor.keys[1].key == Keys.CPRResponse
      assert processor.keys[2].key == "b"
  
imports: from __future__ import annotations
  import pytest
  from prompt_toolkit.input.vt100_parser import Vt100Parser
  from prompt_toolkit.keys import Keys
label_desc: Use image node_id 12 for calling a global function with example usage: test_cpr_response(processor, stream) without return types