code: def test_ints(self):
      for enum in BigNum:
          self.assertEqual(self.dumps(enum), str(enum.value))
          self.assertEqual(int(self.dumps(enum)), enum)
          self.assertEqual(self.loads(self.dumps(enum)), enum)
  
imports: from enum import Enum, IntEnum
  from math import isnan
  from test.test_json import PyTest, CTest
label_desc: Use image node_id 3 for calling the TestEnum obj's underlying member method code with example usage: obj.test_ints() without return types