code: def test_getitem(self):
      class GetItem:
          def __len__(self):
              assert False, "__len__ should not be invoked"
  
          def __getitem__(self, key):
              return key
  
      x = GetItem()
      self.assertEqual(x[self.pos], self.pos)
      self.assertEqual(x[self.neg], self.neg)
      self.assertEqual(
          x[self.neg : self.pos].indices(maxsize), (0, maxsize, 1)
      )
      self.assertEqual(
          x[self.neg : self.pos : 1].indices(maxsize), (0, maxsize, 1)
      )
  
imports: import unittest
  from test import support
  import operator
label_desc: Use image node_id 3 for calling the OverflowTestCase obj's underlying member method code with example usage: obj.test_getitem() and returns: key