code: def test_str_join0(self):
      self.run_test(
          "def str_join0(): a = ['1'] ; a.pop() ; return '+e+'.join(a)",
          str_join0=[],
      )
      self.run_test(
          "def str_join0a(): a = ['1'] ; a.pop() ; return 'e'.join(a)",
          str_join0a=[],
      )
  
imports: from pythran.tests import TestEnv
  from pythran.typing import List
  import unittest
label_desc: Use image node_id 32 for calling the TestStr obj's underlying member method code with example usage: obj.test_str_join0() without return types