code: def test_emacs_yank():
      # ControlY (yank)
      c = InMemoryClipboard(ClipboardData("XYZ"))
      result, cli = _feed_cli_with_input("hello\x02\x19\r", clipboard=c)
      assert result.text == "hellXYZo"
      assert result.cursor_position == len("hellXYZ")
  
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 7 for calling a global function with example usage: test_emacs_yank() without return types