'L{_ErrorFormatter.formatError} should use L{os.strerror} to format
error messages if it is constructed without any better mechanism.'

def test_strerrorFormatting(self):

    formatter = _ErrorFormatter(None, None, None)
    message = formatter.formatError(self.probeErrorCode)
    self.assertEqual(message, os.strerror(self.probeErrorCode))
