code: def test_log1p_(self):
      self.run_test(
          "def log1p_(a):\n from math import log1p\n return log1p(a)",
          1,
          log1p_=[int],
      )
  
imports: from pythran.tests import TestEnv
label_desc: Use image node_id 22 for calling the TestMath obj's underlying member method code with example usage: obj.test_log1p_() without return types