code: def test_vi_operators():
      feed = partial(_feed_cli_with_input, editing_mode=EditingMode.VI)
  
      # Esc g~0
      result, cli = feed("hello\x1bg~0\n")
      assert result.text == "HELLo"
  
      # Esc gU0
      result, cli = feed("hello\x1bgU0\n")
      assert result.text == "HELLo"
  
      # Esc d0
      result, cli = feed("hello\x1bd0\n")
      assert result.text == "o"
  
imports: from __future__ import unicode_literals
  from prompt_toolkit.application import Application
  from prompt_toolkit.buffer import Buffer, AcceptAction
  from prompt_toolkit.clipboard import InMemoryClipboard, ClipboardData
  from prompt_toolkit.enums import DEFAULT_BUFFER, EditingMode
  from prompt_toolkit.eventloop.posix import PosixEventLoop
  from prompt_toolkit.history import InMemoryHistory
  from prompt_toolkit.input import PipeInput
  from prompt_toolkit.interface import CommandLineInterface
  from prompt_toolkit.key_binding.manager import KeyBindingManager
  from prompt_toolkit.output import DummyOutput
  from prompt_toolkit.terminal.vt100_input import ANSI_SEQUENCES
  from functools import partial
  import pytest
label_desc: Use image node_id 20 for calling a global function with example usage: test_vi_operators() without return types