code: def test_command_line_interface(self):
      target_string = "obama.jpg,obama"
      runner = CliRunner()
      image_folder = os.path.join(
          os.path.dirname(__file__), "test_images"
      )
      image_file = os.path.join(
          os.path.dirname(__file__), "test_images", "obama.jpg"
      )
  
      result = runner.invoke(
          face_recognition_cli.main, args=[image_folder, image_file]
      )
  
      self.assertEqual(result.exit_code, 0)
      self.assertTrue(target_string in result.output)
  
imports: import unittest
  import os
  import numpy
  from click.testing import CliRunner
  from face_recognition import api
  from face_recognition import face_recognition_cli
  from face_recognition import face_detection_cli
label_desc: Use image node_id 22 for calling the Test_face_recognition obj's underlying member method code with example usage: obj.test_command_line_interface() without return types