code: def get_mock_stdin_reader(self) -> asyncio.StreamReader:
      stdin_reader = asyncio.StreamReader()
      stdin_reader.feed_data(b"EXIT;\n")
      stdin_reader.feed_eof()
      return stdin_reader
  
file_path: evadb/test/unit_tests/test_eva_cmd_client.py
imports: import argparse
  import asyncio
  import unittest
  from mock import patch
  from evadb.evadb_cmd_client import evadb_client, main
  from evadb.evadb_config import BASE_EVADB_CONFIG
label_desc: Use image node_id 2 for calling the CMDClientTest obj's underlying member method code with example usage: obj.get_mock_stdin_reader() and returns: stdin_reader