code: def testInterruptCaught(self):
      def test(result):
          pid = os.getpid()
          os.kill(pid, signal.SIGINT)
          result.breakCaught = True
          self.assertTrue(result.shouldStop)
  
      def test_function():
          result = unittest.TestResult()
          unittest.installHandler()
          unittest.registerResult(result)
  
          self.assertNotEqual(
              signal.getsignal(signal.SIGINT),
              self._default_handler,
          )
  
          try:
              test(result)
          except KeyboardInterrupt:
              self.fail("KeyboardInterrupt not handled")
          self.assertTrue(result.breakCaught)
  
      self.withRepeats(test_function)
  
imports: import gc
  import io
  import os
  import sys
  import signal
  import weakref
  import unittest
  from test import support
label_desc: Use image node_id 6 for calling the TestBreak obj's underlying member method code with example usage: obj.testInterruptCaught() without return types