code: def test_getslice(self):
      l = [0, 1, 2, 3, 4]
      u = self.type2test(l)
  
      self.assertEqual(u[0:0], self.type2test())
      self.assertEqual(u[1:2], self.type2test([1]))
      self.assertEqual(u[-2:-1], self.type2test([3]))
      self.assertEqual(u[-1000:1000], u)
      self.assertEqual(u[1000:-1000], self.type2test([]))
      self.assertEqual(u[:], u)
      self.assertEqual(u[1:None], self.type2test([1, 2, 3, 4]))
      self.assertEqual(u[None:3], self.type2test([0, 1, 2]))
  
      # Extended slices
      self.assertEqual(u[::], u)
      self.assertEqual(u[::2], self.type2test([0, 2, 4]))
      self.assertEqual(u[1::2], self.type2test([1, 3]))
      self.assertEqual(u[::-1], self.type2test([4, 3, 2, 1, 0]))
      self.assertEqual(u[::-2], self.type2test([4, 2, 0]))
      self.assertEqual(u[3::-2], self.type2test([3, 1]))
      self.assertEqual(u[3:3:-2], self.type2test([]))
      self.assertEqual(u[3:2:-2], self.type2test([3]))
      self.assertEqual(u[3:1:-2], self.type2test([3]))
      self.assertEqual(u[3:0:-2], self.type2test([3, 1]))
      self.assertEqual(u[::-100], self.type2test([4]))
      self.assertEqual(u[100:-100:], self.type2test([]))
      self.assertEqual(u[-100:100:], u)
      self.assertEqual(u[100:-100:-1], u[::-1])
      self.assertEqual(u[-100:100:-1], self.type2test([]))
      self.assertEqual(u[-100:100:2], self.type2test([0, 2, 4]))
  
      # Test extreme cases with long ints
      a = self.type2test([0, 1, 2, 3, 4])
      self.assertEqual(a[-pow(2, 128) : 3], self.type2test([0, 1, 2]))
      self.assertEqual(a[3 : pow(2, 145)], self.type2test([3, 4]))
      self.assertEqual(a[3 :: sys.maxsize], self.type2test([3]))
  
imports: import unittest
  import sys
  import pickle
  from test import support
  from test.support import ALWAYS_EQ, NEVER_EQ
  from itertools import chain
label_desc: Use image node_id 4 for calling the CommonTest obj's underlying member method code with example usage: obj.test_getslice() without return types