docstr: Test permutation without second arg
docstr_tok: ["Test","permutation","without","second","arg"]
code: def test_permutations(self):
      """Test permutation without second arg"""
      self.run_test(
          "def permutations_2_(l0): "
          "  from itertools import permutations;"
          "  return list(permutations(l0))",
          [0, 1, 2, 3],
          permutations_2_=[List[int]],
      )
  
imports: from pythran.tests import TestEnv
  import unittest
  import numpy
  from pythran.typing import List, NDArray
label_desc: Use image node_id 41 for calling the TestItertools obj's underlying member method code with example usage: obj.test_permutations() without return types