code: def test_character_bc(self, state):
      f = getattr(self.module, self.fprefix + "_character_bc_" + state)
  
      c, a = f()
      assert_equal(c, b"a")
      assert_equal(len(a), 1)
  
      c, a = f(b"b")
      assert_equal(c, b"b")
      assert_equal(len(a), 2)
  
      assert_raises(Exception, lambda: f(b"c"))
  
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 5 for calling the TestMiscCharacter obj's underlying member method code with example usage: obj.test_character_bc(state) without return types