code: def test_no_indent(self):
      input_ = "[1,\n2]"
      expect = "[1, 2]\n"
      args = sys.executable, "-m", "json.tool", "--no-indent"
      process = subprocess.run(
          args, input=input_, capture_output=True, text=True, check=True
      )
      self.assertEqual(process.stdout, 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 11 for calling the TestTool obj's underlying member method code with example usage: obj.test_no_indent() without return types