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import asyncio
import ipaddress
import socket
from unittest.mock import patch
import pytest
from aiohttp.resolver import AsyncResolver, DefaultResolver, ThreadedResolver
try:
import aiodns
gethostbyname = hasattr(aiodns.DNSResolver, 'gethostbyname')
except ImportError:
aiodns = None
gethostbyname = False
class FakeResult:
def __init__(self, addresses):
self.addresses = addresses
class FakeQueryResult:
def __init__(self, host):
self.host = host
@asyncio.coroutine
def fake_result(addresses):
return FakeResult(addresses=tuple(addresses))
@asyncio.coroutine
def fake_query_result(result):
return [FakeQueryResult(host=h)
for h in result]
def fake_addrinfo(hosts):
@asyncio.coroutine
def fake(*args, **kwargs):
if not hosts:
raise socket.gaierror
return list([(None, None, None, None, [h, 0])
for h in hosts])
return fake
@pytest.mark.skipif(not gethostbyname, reason="aiodns 1.1 required")
@asyncio.coroutine
def test_async_resolver_positive_lookup(loop):
with patch('aiodns.DNSResolver') as mock:
mock().gethostbyname.return_value = fake_result(['127.0.0.1'])
resolver = AsyncResolver(loop=loop)
real = yield from resolver.resolve('www.python.org')
ipaddress.ip_address(real[0]['host'])
mock().gethostbyname.assert_called_with('www.python.org',
socket.AF_INET)
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
@asyncio.coroutine
def test_async_resolver_query_positive_lookup(loop):
with patch('aiodns.DNSResolver') as mock:
del mock().gethostbyname
mock().query.return_value = fake_query_result(['127.0.0.1'])
resolver = AsyncResolver(loop=loop)
real = yield from resolver.resolve('www.python.org')
ipaddress.ip_address(real[0]['host'])
mock().query.assert_called_with('www.python.org', 'A')
@pytest.mark.skipif(not gethostbyname, reason="aiodns 1.1 required")
@asyncio.coroutine
def test_async_resolver_multiple_replies(loop):
with patch('aiodns.DNSResolver') as mock:
ips = ['127.0.0.1', '127.0.0.2', '127.0.0.3', '127.0.0.4']
mock().gethostbyname.return_value = fake_result(ips)
resolver = AsyncResolver(loop=loop)
real = yield from resolver.resolve('www.google.com')
ips = [ipaddress.ip_address(x['host']) for x in real]
assert len(ips) > 3, "Expecting multiple addresses"
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
@asyncio.coroutine
def test_async_resolver_query_multiple_replies(loop):
with patch('aiodns.DNSResolver') as mock:
del mock().gethostbyname
ips = ['127.0.0.1', '127.0.0.2', '127.0.0.3', '127.0.0.4']
mock().query.return_value = fake_query_result(ips)
resolver = AsyncResolver(loop=loop)
real = yield from resolver.resolve('www.google.com')
ips = [ipaddress.ip_address(x['host']) for x in real]
@pytest.mark.skipif(not gethostbyname, reason="aiodns 1.1 required")
@asyncio.coroutine
def test_async_resolver_negative_lookup(loop):
with patch('aiodns.DNSResolver') as mock:
mock().gethostbyname.side_effect = aiodns.error.DNSError()
resolver = AsyncResolver(loop=loop)
with pytest.raises(aiodns.error.DNSError):
yield from resolver.resolve('doesnotexist.bla')
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
@asyncio.coroutine
def test_async_resolver_query_negative_lookup(loop):
with patch('aiodns.DNSResolver') as mock:
del mock().gethostbyname
mock().query.side_effect = aiodns.error.DNSError()
resolver = AsyncResolver(loop=loop)
with pytest.raises(aiodns.error.DNSError):
yield from resolver.resolve('doesnotexist.bla')
@asyncio.coroutine
def test_threaded_resolver_positive_lookup(loop):
loop.getaddrinfo = fake_addrinfo(["127.0.0.1"])
resolver = ThreadedResolver(loop=loop)
real = yield from resolver.resolve('www.python.org')
ipaddress.ip_address(real[0]['host'])
@asyncio.coroutine
def test_threaded_resolver_multiple_replies(loop):
ips = ['127.0.0.1', '127.0.0.2', '127.0.0.3', '127.0.0.4']
loop.getaddrinfo = fake_addrinfo(ips)
resolver = ThreadedResolver(loop=loop)
real = yield from resolver.resolve('www.google.com')
ips = [ipaddress.ip_address(x['host']) for x in real]
assert len(ips) > 3, "Expecting multiple addresses"
@asyncio.coroutine
def test_threaded_negative_lookup(loop):
ips = []
loop.getaddrinfo = fake_addrinfo(ips)
resolver = ThreadedResolver(loop=loop)
with pytest.raises(socket.gaierror):
yield from resolver.resolve('doesnotexist.bla')
@asyncio.coroutine
def test_close_for_threaded_resolver(loop):
resolver = ThreadedResolver(loop=loop)
yield from resolver.close()
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
@asyncio.coroutine
def test_close_for_async_resolver(loop):
resolver = AsyncResolver(loop=loop)
yield from resolver.close()
def test_default_loop_for_threaded_resolver(loop):
asyncio.set_event_loop(loop)
resolver = ThreadedResolver()
assert resolver._loop is loop
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
def test_default_loop_for_async_resolver(loop):
asyncio.set_event_loop(loop)
resolver = AsyncResolver()
assert resolver._loop is loop
@pytest.mark.skipif(not gethostbyname, reason="aiodns 1.1 required")
@asyncio.coroutine
def test_async_resolver_ipv6_positive_lookup(loop):
with patch('aiodns.DNSResolver') as mock:
mock().gethostbyname.return_value = fake_result(['::1'])
resolver = AsyncResolver(loop=loop)
real = yield from resolver.resolve('www.python.org',
family=socket.AF_INET6)
ipaddress.ip_address(real[0]['host'])
mock().gethostbyname.assert_called_with('www.python.org',
socket.AF_INET6)
@pytest.mark.skipif(aiodns is None, reason="aiodns required")
@asyncio.coroutine
def test_async_resolver_query_ipv6_positive_lookup(loop):
with patch('aiodns.DNSResolver') as mock:
del mock().gethostbyname
mock().query.return_value = fake_query_result(['::1'])
resolver = AsyncResolver(loop=loop)
real = yield from resolver.resolve('www.python.org',
family=socket.AF_INET6)
ipaddress.ip_address(real[0]['host'])
mock().query.assert_called_with('www.python.org', 'AAAA')
def test_async_resolver_aiodns_not_present(loop, monkeypatch):
monkeypatch.setattr("aiohttp.resolver.aiodns", None)
with pytest.raises(RuntimeError):
AsyncResolver(loop=loop)
def test_default_resolver():
# if gethostbyname:
# assert DefaultResolver is AsyncResolver
# else:
# assert DefaultResolver is ThreadedResolver
assert DefaultResolver is ThreadedResolver
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