code: def test_emacs_kill_ring():
      operations = (
          # abc ControlA ControlK
          "abc\x01\x0b"
          # def ControlA ControlK
          "def\x01\x0b"
          # ghi ControlA ControlK
          "ghi\x01\x0b"
          # ControlY (yank)
          "\x19"
      )
  
      result, cli = _feed_cli_with_input(operations + "\r")
      assert result.text == "ghi"
  
      result, cli = _feed_cli_with_input(operations + "\x1by\r")
      assert result.text == "def"
  
      result, cli = _feed_cli_with_input(operations + "\x1by\x1by\r")
      assert result.text == "abc"
  
      result, cli = _feed_cli_with_input(
          operations + "\x1by\x1by\x1by\r"
      )
      assert result.text == "ghi"
  
imports: from __future__ import annotations
  from functools import partial
  import pytest
  from prompt_toolkit.clipboard import ClipboardData, InMemoryClipboard
  from prompt_toolkit.enums import EditingMode
  from prompt_toolkit.filters import ViInsertMode
  from prompt_toolkit.history import InMemoryHistory
  from prompt_toolkit.input.defaults import create_pipe_input
  from prompt_toolkit.input.vt100_parser import ANSI_SEQUENCES
  from prompt_toolkit.key_binding.bindings.named_commands import prefix_meta
  from prompt_toolkit.key_binding.key_bindings import KeyBindings
  from prompt_toolkit.output import DummyOutput
  from prompt_toolkit.shortcuts import PromptSession
label_desc: Use image node_id 16 for calling a global function with example usage: test_emacs_kill_ring() without return types