code: def test_init__empty_tests(self):
      suite = unittest.TestSuite([])
  
      self.assertEqual(suite.countTestCases(), 0)
      # countTestCases() still works after tests are run
      suite.run(unittest.TestResult())
      self.assertEqual(suite.countTestCases(), 0)
  
imports: import unittest
  import gc
  import sys
  import weakref
  from test.test_unittest.support import LoggingResult, TestEquality
label_desc: Use image node_id 2 for calling the Test_TestSuite obj's underlying member method code with example usage: obj.test_init__empty_tests() without return types