# Copyright (C) 2003-2007, 2009, 2010 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.

import cStringIO
import sys
import time
import unittest

import dns.name
import dns.message
import dns.name
import dns.rdataclass
import dns.rdatatype
import dns.resolver

resolv_conf = """
    /t/t
# comment 1
; comment 2
domain foo
nameserver 10.0.0.1
nameserver 10.0.0.2
"""

message_text = """id 1234
opcode QUERY
rcode NOERROR
flags QR AA RD
;QUESTION
example. IN A
;ANSWER
example. 1 IN A 10.0.0.1
;AUTHORITY
;ADDITIONAL
"""

class ResolverTestCase(unittest.TestCase):

    if sys.platform != 'win32':
        def testRead(self):
            f = cStringIO.StringIO(resolv_conf)
            r = dns.resolver.Resolver(f)
            self.failUnless(r.nameservers == ['10.0.0.1', '10.0.0.2'] and
                            r.domain == dns.name.from_text('foo'))

    def testCacheExpiration(self):
        message = dns.message.from_text(message_text)
        name = dns.name.from_text('example.')
        answer = dns.resolver.Answer(name, dns.rdatatype.A, dns.rdataclass.IN,
                                     message)
        cache = dns.resolver.Cache()
        cache.put((name, dns.rdatatype.A, dns.rdataclass.IN), answer)
        time.sleep(2)
        self.failUnless(cache.get((name, dns.rdatatype.A, dns.rdataclass.IN))
                        is None)

    def testCacheCleaning(self):
        message = dns.message.from_text(message_text)
        name = dns.name.from_text('example.')
        answer = dns.resolver.Answer(name, dns.rdatatype.A, dns.rdataclass.IN,
                                     message)
        cache = dns.resolver.Cache(cleaning_interval=1.0)
        cache.put((name, dns.rdatatype.A, dns.rdataclass.IN), answer)
        time.sleep(2)
        self.failUnless(cache.get((name, dns.rdatatype.A, dns.rdataclass.IN))
                        is None)

    def testZoneForName1(self):
        name = dns.name.from_text('www.dnspython.org.')
        ezname = dns.name.from_text('dnspython.org.')
        zname = dns.resolver.zone_for_name(name)
        self.failUnless(zname == ezname)

    def testZoneForName2(self):
        name = dns.name.from_text('a.b.www.dnspython.org.')
        ezname = dns.name.from_text('dnspython.org.')
        zname = dns.resolver.zone_for_name(name)
        self.failUnless(zname == ezname)

    def testZoneForName3(self):
        name = dns.name.from_text('dnspython.org.')
        ezname = dns.name.from_text('dnspython.org.')
        zname = dns.resolver.zone_for_name(name)
        self.failUnless(zname == ezname)

    def testZoneForName4(self):
        def bad():
            name = dns.name.from_text('dnspython.org', None)
            zname = dns.resolver.zone_for_name(name)
        self.failUnlessRaises(dns.resolver.NotAbsolute, bad)

if __name__ == '__main__':
    unittest.main()