# Copyright (C) Dnspython Contributors, see LICENSE for text of ISC license

# -*- coding: utf-8
# Copyright (C) 2003-2007, 2009-2011 Nominum, Inc.
#
# Permission to use, copy, modify, and distribute this software and its
# documentation for any purpose with or without fee is hereby granted,
# provided that the above copyright notice and this permission notice
# appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND NOMINUM DISCLAIMS ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL NOMINUM BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
# OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

from __future__ import print_function

import unittest

from io import BytesIO

import dns.edns

class OptionTestCase(unittest.TestCase):
    def testGenericOption(self):
        opt = dns.edns.GenericOption(3, b'data')
        io = BytesIO()
        opt.to_wire(io)
        data = io.getvalue()
        self.assertEqual(data, b'data')

    def testECSOption_prefix_length(self):
        opt = dns.edns.ECSOption('1.2.255.33', 20)
        io = BytesIO()
        opt.to_wire(io)
        data = io.getvalue()
        self.assertEqual(data, b'\x00\x01\x14\x00\x01\x02\xf0')

    def testECSOption_from_wire(self):
        opt = dns.edns.option_from_wire(8, b'\x00\x01\x14\x00\x01\x02\xf0',
                                        0, 7)
        self.assertEqual(opt.otype, dns.edns.ECS)
        self.assertEqual(opt.address, '1.2.240.0')
        self.assertEqual(opt.srclen, 20)
        self.assertEqual(opt.scopelen, 0)

    def testECSOption(self):
        opt = dns.edns.ECSOption('1.2.3.4', 24)
        io = BytesIO()
        opt.to_wire(io)
        data = io.getvalue()
        self.assertEqual(data, b'\x00\x01\x18\x00\x01\x02\x03')

    def testECSOption_v6(self):
        opt = dns.edns.ECSOption('2001:4b98::1')
        io = BytesIO()
        opt.to_wire(io)
        data = io.getvalue()
        self.assertEqual(data, b'\x00\x02\x38\x00\x20\x01\x4b\x98\x00\x00\x00')
