code: def test_output(self):
      f = getattr(self.module, self.fprefix + "_output")
  
      assert_equal(f(ord(b"a")), b"a")
      assert_equal(f(0), b"\0")
  
imports: import pytest
  import textwrap
  from numpy.testing import assert_array_equal, assert_equal, assert_raises
  import numpy
  from numpy.f2py.tests import util
label_desc: Use image node_id 6 for calling the TestCharacter obj's underlying member method code with example usage: obj.test_output() without return types