code: def test_main():
      support.run_unittest(PseudeOutputFilesTest, PseudeInputFilesTest)
  
imports: import unittest
  import io
  from idlelib.PyShell import PseudoInputFile, PseudoOutputFile
  from test import test_support
label_desc: Use image node_id 1 for calling a global function with example usage: test_main() without return types