mirror of
https://github.com/tahoe-lafs/tahoe-lafs.git
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139 lines
4.1 KiB
Python
139 lines
4.1 KiB
Python
"""
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Tests for allmydata.util.iputil.
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Ported to Python 3.
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"""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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from __future__ import unicode_literals
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from future.utils import PY2, native_str
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if PY2:
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from builtins import filter, map, zip, ascii, chr, hex, input, next, oct, open, pow, round, super, bytes, dict, list, object, range, str, max, min # noqa: F401
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import os, socket
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import gc
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from testtools.matchers import (
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MatchesAll,
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IsInstance,
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AllMatch,
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MatchesPredicate,
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)
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from twisted.trial import unittest
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from tenacity import retry, stop_after_attempt
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from foolscap.api import Tub
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from allmydata.util import iputil, gcutil
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from ..util.iputil import (
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get_local_addresses_sync,
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)
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from .common import (
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SyncTestCase,
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)
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class ListenOnUsed(unittest.TestCase):
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"""Tests for listenOnUnused."""
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def create_tub(self, basedir):
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os.makedirs(basedir)
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tubfile = os.path.join(basedir, "tub.pem")
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tub = Tub(certFile=tubfile)
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tub.setOption("expose-remote-exception-types", False)
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tub.startService()
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self.addCleanup(tub.stopService)
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return tub
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@retry(stop=stop_after_attempt(7))
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def test_random_port(self):
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"""A random port is selected if none is given."""
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tub = self.create_tub("utils/ListenOnUsed/test_randomport")
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self.assertEqual(len(tub.getListeners()), 0)
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portnum = iputil.listenOnUnused(tub)
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# We can connect to this port:
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s = socket.socket()
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s.connect(("127.0.0.1", portnum))
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s.close()
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self.assertEqual(len(tub.getListeners()), 1)
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# Listen on another port:
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tub2 = self.create_tub("utils/ListenOnUsed/test_randomport_2")
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portnum2 = iputil.listenOnUnused(tub2)
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self.assertNotEqual(portnum, portnum2)
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@retry(stop=stop_after_attempt(7))
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def test_specific_port(self):
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"""The given port is used."""
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tub = self.create_tub("utils/ListenOnUsed/test_givenport")
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s = socket.socket()
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s.bind(("127.0.0.1", 0))
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port = s.getsockname()[1]
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s.close()
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port2 = iputil.listenOnUnused(tub, port)
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self.assertEqual(port, port2)
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class GcUtil(unittest.TestCase):
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"""Tests for allmydata.util.gcutil, which is used only by listenOnUnused."""
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def test_gc_after_allocations(self):
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"""The resource tracker triggers allocations every 26 allocations."""
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tracker = gcutil._ResourceTracker()
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collections = []
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self.patch(gc, "collect", lambda: collections.append(1))
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for _ in range(2):
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for _ in range(25):
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tracker.allocate()
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self.assertEqual(len(collections), 0)
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tracker.allocate()
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self.assertEqual(len(collections), 1)
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del collections[:]
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def test_release_delays_gc(self):
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"""Releasing a file descriptor resource delays GC collection."""
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tracker = gcutil._ResourceTracker()
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collections = []
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self.patch(gc, "collect", lambda: collections.append(1))
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for _ in range(2):
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tracker.allocate()
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for _ in range(3):
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tracker.release()
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for _ in range(25):
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tracker.allocate()
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self.assertEqual(len(collections), 0)
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tracker.allocate()
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self.assertEqual(len(collections), 1)
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class GetLocalAddressesSyncTests(SyncTestCase):
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"""
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Tests for ``get_local_addresses_sync``.
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"""
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def test_some_ipv4_addresses(self):
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"""
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``get_local_addresses_sync`` returns a list of IPv4 addresses as native
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strings.
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"""
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self.assertThat(
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get_local_addresses_sync(),
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MatchesAll(
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IsInstance(list),
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AllMatch(
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MatchesAll(
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IsInstance(native_str),
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MatchesPredicate(
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lambda addr: socket.inet_pton(socket.AF_INET, addr),
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"%r is not an IPv4 address.",
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),
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),
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),
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),
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)
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