code: def test_run_headless(self):
      output_directory = tempfile.mkdtemp()
      temp_directory = os.path.join(output_directory, "temp")
      os.mkdir(temp_directory)
      try:
          #
          # Run with a .cp file
          #
          fly_pipe = get_test_resources_directory(
              "../ExampleFlyURL.cppipe"
          )
          done_file = os.path.join(output_directory, "Done.txt")
          self.run_cellprofiler(
              "-c",
              "-r",
              "-o",
              output_directory,
              "-p",
              fly_pipe,
              "-d",
              done_file,
              "-t",
              temp_directory,
              "-f",
              "1",
              "-l",
              "1",
          )
          import cellprofiler_core.preferences as cpprefs
  
          self.assertTrue(os.path.exists(done_file))
  
      except IOError as e:
          if e.args[0] != "http error":
              raise e
  
          def bad_url(e=e):
              raise e
  
          unittest.expectedFailure(bad_url)()
      finally:
          shutil.rmtree(output_directory)
  
file_path: CellProfiler/tests/frontend/test_cellprofiler.py
imports: import os
  import shutil
  import subprocess
  import sys
  import tempfile
  import unittest
  from tests.frontend.modules import get_test_resources_directory
label_desc: Use image node_id 3 for calling the TestCellProfiler obj's underlying member method code with example usage: obj.test_run_headless() without return types