code: def test_stdin_stdout(self):
      args = sys.executable, "-m", "json.tool"
      process = subprocess.run(
          args,
          input=self.data,
          capture_output=True,
          text=True,
          check=True,
      )
      self.assertEqual(process.stdout, self.expect)
      self.assertEqual(process.stderr, "")
  
imports: import errno
  import os
  import sys
  import textwrap
  import unittest
  import subprocess
  from test import support
  from test.support import os_helper
  from test.support.script_helper import assert_python_ok
label_desc: Use image node_id 1 for calling the TestTool obj's underlying member method code with example usage: obj.test_stdin_stdout() without return types