code: def test_empty(self):
      with self.assertRaisesRegexp(SystemExit, ""):
          net_run.main()
      with self.assertRaisesRegexp(SystemExit, ""):
          net_gan.main()
      with self.assertRaisesRegexp(SystemExit, ""):
          net_segment.main()
      with self.assertRaisesRegexp(SystemExit, ""):
          net_regress.main()
      with self.assertRaisesRegexp(SystemExit, ""):
          net_autoencoder.main()
  
file_path: NiftyNet/tests/entry_point_test.py
imports: from __future__ import absolute_import, print_function
  import os
  import sys
  import tensorflow
  import net_autoencoder
  import net_gan
  import net_regress
  import net_run
  import net_segment
  from tests.niftynet_testcase import NiftyNetTestCase
label_desc: Use image node_id 5 for calling the EntryPointTest obj's underlying member method code with example usage: obj.test_empty() without return types