def test_get_encoding_ascii():

->     temp = py.test.ensuretemp('test_get_encoding')

       fpath = temp.join('ascii.py')

       fpath.write(str(py.code.Source("""\

           def foo():

               return 'foo'

       """)))

       # XXX I think the specs say we have to assume latin-1 here...

       assert get_module_encoding(fpath.strpath) == 'ISO-8859-1'