code: def test_product_iter(self):
      self.run_test(
          """
                        def product_iter(n):
                          from itertools import product
                          s = 0
                          for x in product(n,n):
                            for y in x:
                              s += y
                          return s""",
          list(range(-5, 5)),
          product_iter=[List[int]],
      )
  
imports: from pythran.tests import TestEnv
  import unittest
  import numpy
  from pythran.typing import List, NDArray
label_desc: Use image node_id 28 for calling the TestItertools obj's underlying member method code with example usage: obj.test_product_iter() without return types