code: def test_supercommand(self):
      opt = script.superscript_main(
          args=["test_script", "--foo", "test"]
      )
      assert opt.get("foo") == "test"
  
imports: import sys
  import unittest
  from unittest.mock import patch
  from parlai.core.params import ParlaiParser
  import parlai.core.script
  import parlai.utils.testing
label_desc: Use image node_id 2 for calling the TestSuperCommand obj's underlying member method code with example usage: obj.test_supercommand() without return types