code: def test_exp_(self):
      self.run_test(
          "def exp_(a):\n from math import exp\n return exp(a)",
          1,
          exp_=[int],
      )
  
imports: from pythran.tests import TestEnv
label_desc: Use image node_id 2 for calling the TestMath obj's underlying member method code with example usage: obj.test_exp_() without return types