code: def test_slice(self):
      def check(start, stop, step=None):
          i = slice(start, stop, step)
          self.assertEqual(list(r[i]), list(r)[i])
          self.assertEqual(len(r[i]), len(list(r)[i]))
  
      for r in [
          range(10),
          range(0),
          range(1, 9, 3),
          range(8, 0, -3),
          range(sys.maxsize + 1, sys.maxsize + 10),
      ]:
          check(0, 2)
          check(0, 20)
          check(1, 2)
          check(20, 30)
          check(-30, -20)
          check(-1, 100, 2)
          check(0, -1)
          check(-1, -3, -1)
  
imports: import unittest
  import sys
  import pickle
  import itertools
  from test.support import ALWAYS_EQ
label_desc: Use image node_id 24 for calling the RangeTest obj's underlying member method code with example usage: obj.test_slice() without return types