python-zeroconf/tests/test_dns.py at release-pure-python-wheel · python-zeroconf/python-zeroconf · GitHub

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"""Unit tests for zeroconf._dns."""

from __future__ import annotations

import logging

import os

import socket

import unittest.mock

import pytest

import zeroconf as r

from zeroconf import DNSHinfo, DNSText, ServiceInfo, const, current_time_millis

from zeroconf._dns import DNSRRSet

from . import has_working_ipv6

log = logging.getLogger("zeroconf")

original_logging_level = logging.NOTSET

def setup_module():

global original_logging_level

original_logging_level = log.level

log.setLevel(logging.DEBUG)

def teardown_module():

if original_logging_level != logging.NOTSET:

log.setLevel(original_logging_level)

def test_display_compat_shims():

"""The legacy display helpers stay callable and route through the new formatter."""

record = r.DNSPointer(

"_http._tcp.local.", const._TYPE_PTR, const._CLASS_IN, const._DNS_OTHER_TTL, "demo._http._tcp.local."

)

assert r.DNSEntry.get_type(const._TYPE_PTR) == "ptr"

assert r.DNSEntry.get_type(4242) == "unknown-type-4242"

assert r.DNSEntry.get_class_(const._CLASS_IN) == "in"

assert r.DNSEntry.get_class_(4242) == "unknown-class-4242"

assert record.entry_to_string("hdr", None).startswith("<hdr ")

assert "data=extra" in record.entry_to_string("hdr", "extra")

assert "data=payload" in record.to_string("payload")

assert record.type_label == "ptr"

assert record.class_label == "in"

class TestDunder(unittest.TestCase):

def test_dns_text_repr(self):

# There was an issue on Python 3 that prevented DNSText's repr

# from working when the text was longer than 10 bytes

text = DNSText("irrelevant", 0, 0, 0, b"12345678901")

repr(text)

text = DNSText("irrelevant", 0, 0, 0, b"123")

repr(text)

def test_dns_hinfo_repr_eq(self):

hinfo = DNSHinfo("irrelevant", const._TYPE_HINFO, 0, 0, "cpu", "os")

assert hinfo == hinfo

repr(hinfo)

def test_dns_pointer_repr(self):

pointer = r.DNSPointer("irrelevant", const._TYPE_PTR, const._CLASS_IN, const._DNS_OTHER_TTL, "123")

repr(pointer)

@unittest.skipIf(not has_working_ipv6(), "Requires IPv6")

@unittest.skipIf(os.environ.get("SKIP_IPV6"), "IPv6 tests disabled")

def test_dns_address_repr(self):

address = r.DNSAddress("irrelevant", const._TYPE_SOA, const._CLASS_IN, 1, b"a")

assert "data=b'a'" in repr(address)

address_ipv4 = r.DNSAddress(

"irrelevant",

const._TYPE_SOA,

const._CLASS_IN,

socket.inet_pton(socket.AF_INET, "127.0.0.1"),

)

assert "data=127.0.0.1" in repr(address_ipv4)

address_ipv6 = r.DNSAddress(

"irrelevant",

const._TYPE_SOA,

const._CLASS_IN,

socket.inet_pton(socket.AF_INET6, "::1"),

)

assert "data=::1" in repr(address_ipv6)

def test_dns_question_repr(self):

question = r.DNSQuestion("irrelevant", const._TYPE_SRV, const._CLASS_IN | const._CLASS_UNIQUE)

repr(question)

assert (question != question) is False

def test_dns_service_repr(self):

service = r.DNSService(

"irrelevant",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"a",

)

repr(service)

def test_dns_record_abc(self):

record = r.DNSRecord("irrelevant", const._TYPE_SRV, const._CLASS_IN, const._DNS_HOST_TTL)

self.assertRaises(r.AbstractMethodException, record.__eq__, record)

with pytest.raises((r.AbstractMethodException, TypeError)):

record.write(None) # type: ignore[arg-type]

def test_service_info_dunder(self):

type_ = "_test-srvc-type._tcp.local."

name = "xxxyyy"

registration_name = f"{name}.{type_}"

info = ServiceInfo(

type_,

registration_name,

80,

b"",

"spare-rig.local.",

addresses=[socket.inet_aton("10.7.4.2")],

)

assert (info != info) is False

repr(info)

def test_service_info_text_properties_not_given(self):

type_ = "_test-srvc-type._tcp.local."

name = "xxxyyy"

registration_name = f"{name}.{type_}"

info = ServiceInfo(

type_=type_,

name=registration_name,

addresses=[socket.inet_aton("10.7.4.2")],

port=80,

server="spare-rig.local.",

)

assert isinstance(info.text, bytes)

repr(info)

def test_dns_outgoing_repr(self):

dns_outgoing = r.DNSOutgoing(const._FLAGS_QR_QUERY)

repr(dns_outgoing)

def test_dns_record_is_expired(self):

record = r.DNSRecord("irrelevant", const._TYPE_SRV, const._CLASS_IN, 8)

now = current_time_millis()

assert record.is_expired(now) is False

assert record.is_expired(now + (8 / 2 * 1000)) is False

assert record.is_expired(now + (8 * 1000)) is True

def test_dns_record_is_stale(self):

record = r.DNSRecord("irrelevant", const._TYPE_SRV, const._CLASS_IN, 8)

now = current_time_millis()

assert record.is_stale(now) is False

assert record.is_stale(now + (8 / 4.1 * 1000)) is False

assert record.is_stale(now + (8 / 1.9 * 1000)) is True

assert record.is_stale(now + (8 * 1000)) is True

def test_dns_record_is_recent(self):

now = current_time_millis()

record = r.DNSRecord("irrelevant", const._TYPE_SRV, const._CLASS_IN, 8)

assert record.is_recent(now + (8 / 4.2 * 1000)) is True

assert record.is_recent(now + (8 / 3 * 1000)) is False

assert record.is_recent(now + (8 / 2 * 1000)) is False

assert record.is_recent(now + (8 * 1000)) is False

def test_dns_question_hashablity():

"""Test DNSQuestions are hashable."""

record1 = r.DNSQuestion("irrelevant", const._TYPE_A, const._CLASS_IN)

record2 = r.DNSQuestion("irrelevant", const._TYPE_A, const._CLASS_IN)

record_set = {record1, record2}

assert len(record_set) == 1

record_set.add(record1)

assert len(record_set) == 1

record3_dupe = r.DNSQuestion("irrelevant", const._TYPE_A, const._CLASS_IN)

assert record2 == record3_dupe

assert record2.__hash__() == record3_dupe.__hash__()

record_set.add(record3_dupe)

assert len(record_set) == 1

record4_dupe = r.DNSQuestion("notsame", const._TYPE_A, const._CLASS_IN)

assert record2 != record4_dupe

assert record2.__hash__() != record4_dupe.__hash__()

record_set.add(record4_dupe)

assert len(record_set) == 2

def test_dns_record_hashablity_does_not_consider_ttl():

"""Test DNSRecord are hashable."""

# Verify the TTL is not considered in the hash

record1 = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_OTHER_TTL, b"same")

record2 = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_HOST_TTL, b"same")

record_set = {record1, record2}

assert len(record_set) == 1

record_set.add(record1)

assert len(record_set) == 1

record3_dupe = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_HOST_TTL, b"same")

assert record2 == record3_dupe

assert record2.__hash__() == record3_dupe.__hash__()

record_set.add(record3_dupe)

assert len(record_set) == 1

def test_dns_record_hashablity_does_not_consider_created():

"""Test DNSRecord are hashable and created is not considered."""

# Verify the TTL is not considered in the hash

record1 = r.DNSAddress(

"irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_HOST_TTL, b"same", created=1.0

)

record2 = r.DNSAddress(

"irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_HOST_TTL, b"same", created=2.0

)

record_set = {record1, record2}

assert len(record_set) == 1

record_set.add(record1)

assert len(record_set) == 1

record3_dupe = r.DNSAddress(

"irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_HOST_TTL, b"same", created=3.0

)

assert record2 == record3_dupe

assert record2.__hash__() == record3_dupe.__hash__()

record_set.add(record3_dupe)

assert len(record_set) == 1

def test_dns_record_hashablity_does_not_consider_unique():

"""Test DNSRecord are hashable and unique is ignored."""

# Verify the unique value is not considered in the hash

record1 = r.DNSAddress(

"irrelevant",

const._TYPE_A,

const._CLASS_IN | const._CLASS_UNIQUE,

const._DNS_OTHER_TTL,

b"same",

)

record2 = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, const._DNS_OTHER_TTL, b"same")

assert record1.class_ == record2.class_

assert record1.__hash__() == record2.__hash__()

record_set = {record1, record2}

assert len(record_set) == 1

def test_dns_address_record_hashablity():

"""Test DNSAddress are hashable."""

address1 = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 1, b"a")

address2 = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 1, b"b")

address3 = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 1, b"c")

address4 = r.DNSAddress("irrelevant", const._TYPE_AAAA, const._CLASS_IN, 1, b"c")

record_set = {address1, address2, address3, address4}

assert len(record_set) == 4

record_set.add(address1)

assert len(record_set) == 4

address3_dupe = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 1, b"c")

record_set.add(address3_dupe)

assert len(record_set) == 4

# Verify we can remove records

additional_set = {address1, address2}

record_set -= additional_set

assert record_set == {address3, address4}

def test_dns_hinfo_record_hashablity():

"""Test DNSHinfo are hashable."""

hinfo1 = r.DNSHinfo("irrelevant", const._TYPE_HINFO, 0, 0, "cpu1", "os")

hinfo2 = r.DNSHinfo("irrelevant", const._TYPE_HINFO, 0, 0, "cpu2", "os")

record_set = {hinfo1, hinfo2}

assert len(record_set) == 2

record_set.add(hinfo1)

assert len(record_set) == 2

hinfo2_dupe = r.DNSHinfo("irrelevant", const._TYPE_HINFO, 0, 0, "cpu2", "os")

assert hinfo2 == hinfo2_dupe

assert hinfo2.__hash__() == hinfo2_dupe.__hash__()

record_set.add(hinfo2_dupe)

assert len(record_set) == 2

def test_dns_pointer_record_hashablity():

"""Test DNSPointer are hashable."""

ptr1 = r.DNSPointer("irrelevant", const._TYPE_PTR, const._CLASS_IN, const._DNS_OTHER_TTL, "123")

ptr2 = r.DNSPointer("irrelevant", const._TYPE_PTR, const._CLASS_IN, const._DNS_OTHER_TTL, "456")

record_set = {ptr1, ptr2}

assert len(record_set) == 2

record_set.add(ptr1)

assert len(record_set) == 2

ptr2_dupe = r.DNSPointer("irrelevant", const._TYPE_PTR, const._CLASS_IN, const._DNS_OTHER_TTL, "456")

assert ptr2 == ptr2

assert ptr2.__hash__() == ptr2_dupe.__hash__()

record_set.add(ptr2_dupe)

assert len(record_set) == 2

def test_dns_pointer_comparison_is_case_insensitive():

"""Test DNSPointer comparison is case insensitive."""

ptr1 = r.DNSPointer("irrelevant", const._TYPE_PTR, const._CLASS_IN, const._DNS_OTHER_TTL, "123")

ptr2 = r.DNSPointer(

"irrelevant".upper(),

const._TYPE_PTR,

const._CLASS_IN,

const._DNS_OTHER_TTL,

"123",

)

assert ptr1 == ptr2

def test_dns_text_record_hashablity():

"""Test DNSText are hashable."""

text1 = r.DNSText("irrelevant", 0, 0, const._DNS_OTHER_TTL, b"12345678901")

text2 = r.DNSText("irrelevant", 1, 0, const._DNS_OTHER_TTL, b"12345678901")

text3 = r.DNSText("irrelevant", 0, 1, const._DNS_OTHER_TTL, b"12345678901")

text4 = r.DNSText("irrelevant", 0, 0, const._DNS_OTHER_TTL, b"ABCDEFGHIJK")

record_set = {text1, text2, text3, text4}

assert len(record_set) == 4

record_set.add(text1)

assert len(record_set) == 4

text1_dupe = r.DNSText("irrelevant", 0, 0, const._DNS_OTHER_TTL, b"12345678901")

assert text1 == text1_dupe

assert text1.__hash__() == text1_dupe.__hash__()

record_set.add(text1_dupe)

assert len(record_set) == 4

def test_dns_service_record_hashablity():

"""Test DNSService are hashable."""

srv1 = r.DNSService(

"irrelevant",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"a",

)

srv2 = r.DNSService(

"irrelevant",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"a",

)

srv3 = r.DNSService(

"irrelevant",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

81,

"a",

)

srv4 = r.DNSService(

"irrelevant",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"ab",

)

record_set = {srv1, srv2, srv3, srv4}

assert len(record_set) == 4

record_set.add(srv1)

assert len(record_set) == 4

srv1_dupe = r.DNSService(

"irrelevant",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"a",

)

assert srv1 == srv1_dupe

assert srv1.__hash__() == srv1_dupe.__hash__()

record_set.add(srv1_dupe)

assert len(record_set) == 4

def test_dns_service_server_key():

"""Test DNSService server_key is lowercase."""

srv1 = r.DNSService(

"X._tcp._http.local.",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"X.local.",

)

assert srv1.name == "X._tcp._http.local."

assert srv1.key == "x._tcp._http.local."

assert srv1.server == "X.local."

assert srv1.server_key == "x.local."

def test_dns_service_server_comparison_is_case_insensitive():

"""Test DNSService server comparison is case insensitive."""

srv1 = r.DNSService(

"X._tcp._http.local.",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"X.local.",

)

srv2 = r.DNSService(

"X._tcp._http.local.",

const._TYPE_SRV,

const._CLASS_IN,

const._DNS_HOST_TTL,

80,

"x.local.",

)

assert srv1 == srv2

def test_dns_nsec_record_hashablity():

"""Test DNSNsec are hashable."""

nsec1 = r.DNSNsec(

"irrelevant",

const._TYPE_PTR,

const._CLASS_IN,

const._DNS_OTHER_TTL,

"irrelevant",

[1, 2, 3],

)

nsec2 = r.DNSNsec(

"irrelevant",

const._TYPE_PTR,

const._CLASS_IN,

const._DNS_OTHER_TTL,

"irrelevant",

[1, 2],

)

record_set = {nsec1, nsec2}

assert len(record_set) == 2

record_set.add(nsec1)

assert len(record_set) == 2

nsec2_dupe = r.DNSNsec(

"irrelevant",

const._TYPE_PTR,

const._CLASS_IN,

const._DNS_OTHER_TTL,

"irrelevant",

[1, 2],

)

assert nsec2 == nsec2_dupe

assert nsec2.__hash__() == nsec2_dupe.__hash__()

record_set.add(nsec2_dupe)

assert len(record_set) == 2

def test_rrset_does_not_consider_ttl():

"""Test DNSRRSet does not consider the ttl in the hash."""

longarec = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 100, b"same")

shortarec = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 10, b"same")

longaaaarec = r.DNSAddress("irrelevant", const._TYPE_AAAA, const._CLASS_IN, 100, b"same")

shortaaaarec = r.DNSAddress("irrelevant", const._TYPE_AAAA, const._CLASS_IN, 10, b"same")

rrset = DNSRRSet([longarec, shortaaaarec])

assert rrset.suppresses(longarec)

assert rrset.suppresses(shortarec)

assert not rrset.suppresses(longaaaarec)

assert rrset.suppresses(shortaaaarec)

verylongarec = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 1000, b"same")

longarec = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 100, b"same")

mediumarec = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 60, b"same")

shortarec = r.DNSAddress("irrelevant", const._TYPE_A, const._CLASS_IN, 10, b"same")

rrset2 = DNSRRSet([mediumarec])

assert not rrset2.suppresses(verylongarec)

assert rrset2.suppresses(longarec)

assert rrset2.suppresses(mediumarec)

assert rrset2.suppresses(shortarec)

python-zeroconf/tests/test_dns.py at release-pure-python-wheel · python-zeroconf/python-zeroconf · GitHub

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