certbot/acme/tests/client_test.py

"""Tests for acme.client."""
# pylint: disable=too-many-lines
import copy
import datetime
import json
import unittest

import josepy as jose
import mock
import OpenSSL
import requests
from six.moves import http_client  # pylint: disable=import-error

from acme import challenges
from acme import errors
from acme import jws as acme_jws
from acme import messages
from acme.magic_typing import Dict  # pylint: disable=unused-import, no-name-in-module
import messages_test
import test_util

CERT_DER = test_util.load_vector('cert.der')
CERT_SAN_PEM = test_util.load_vector('cert-san.pem')
CSR_SAN_PEM = test_util.load_vector('csr-san.pem')
KEY = jose.JWKRSA.load(test_util.load_vector('rsa512_key.pem'))
KEY2 = jose.JWKRSA.load(test_util.load_vector('rsa256_key.pem'))

DIRECTORY_V1 = messages.Directory({
    messages.NewRegistration:
        'https://www.letsencrypt-demo.org/acme/new-reg',
    messages.Revocation:
        'https://www.letsencrypt-demo.org/acme/revoke-cert',
    messages.NewAuthorization:
        'https://www.letsencrypt-demo.org/acme/new-authz',
    messages.CertificateRequest:
        'https://www.letsencrypt-demo.org/acme/new-cert',
})

DIRECTORY_V2 = messages.Directory({
    'newAccount': 'https://www.letsencrypt-demo.org/acme/new-account',
    'newNonce': 'https://www.letsencrypt-demo.org/acme/new-nonce',
    'newOrder': 'https://www.letsencrypt-demo.org/acme/new-order',
    'revokeCert': 'https://www.letsencrypt-demo.org/acme/revoke-cert',
})


class ClientTestBase(unittest.TestCase):
    """Base for tests in acme.client."""

    def setUp(self):
        self.response = mock.MagicMock(
            ok=True, status_code=http_client.OK, headers={}, links={})
        self.net = mock.MagicMock()
        self.net.post.return_value = self.response
        self.net.get.return_value = self.response

        self.identifier = messages.Identifier(
            typ=messages.IDENTIFIER_FQDN, value='example.com')

        # Registration
        self.contact = ('mailto:cert-admin@example.com', 'tel:+12025551212')
        reg = messages.Registration(
            contact=self.contact, key=KEY.public_key())
        the_arg = dict(reg)  # type: Dict
        self.new_reg = messages.NewRegistration(**the_arg)
        self.regr = messages.RegistrationResource(
            body=reg, uri='https://www.letsencrypt-demo.org/acme/reg/1')

        # Authorization
        authzr_uri = 'https://www.letsencrypt-demo.org/acme/authz/1'
        challb = messages.ChallengeBody(
            uri=(authzr_uri + '/1'), status=messages.STATUS_VALID,
            chall=challenges.DNS(token=jose.b64decode(
                'evaGxfADs6pSRb2LAv9IZf17Dt3juxGJ-PCt92wr-oA')))
        self.challr = messages.ChallengeResource(
            body=challb, authzr_uri=authzr_uri)
        self.authz = messages.Authorization(
            identifier=messages.Identifier(
                typ=messages.IDENTIFIER_FQDN, value='example.com'),
            challenges=(challb,), combinations=None)
        self.authzr = messages.AuthorizationResource(
            body=self.authz, uri=authzr_uri)

        # Reason code for revocation
        self.rsn = 1


class BackwardsCompatibleClientV2Test(ClientTestBase):
    """Tests for  acme.client.BackwardsCompatibleClientV2."""

    def setUp(self):
        super(BackwardsCompatibleClientV2Test, self).setUp()
        # contains a loaded cert
        self.certr = messages.CertificateResource(
            body=messages_test.CERT)

        loaded = OpenSSL.crypto.load_certificate(
            OpenSSL.crypto.FILETYPE_PEM, CERT_SAN_PEM)
        wrapped = jose.ComparableX509(loaded)
        self.chain = [wrapped, wrapped]

        self.cert_pem = OpenSSL.crypto.dump_certificate(
            OpenSSL.crypto.FILETYPE_PEM, messages_test.CERT.wrapped).decode()

        single_chain = OpenSSL.crypto.dump_certificate(
            OpenSSL.crypto.FILETYPE_PEM, loaded).decode()
        self.chain_pem = single_chain + single_chain

        self.fullchain_pem = self.cert_pem + self.chain_pem

        self.orderr = messages.OrderResource(
            csr_pem=CSR_SAN_PEM)

    def _init(self):
        uri = 'http://www.letsencrypt-demo.org/directory'
        from acme.client import BackwardsCompatibleClientV2
        return BackwardsCompatibleClientV2(net=self.net,
            key=KEY, server=uri)

    def test_init_downloads_directory(self):
        uri = 'http://www.letsencrypt-demo.org/directory'
        from acme.client import BackwardsCompatibleClientV2
        BackwardsCompatibleClientV2(net=self.net,
            key=KEY, server=uri)
        self.net.get.assert_called_once_with(uri)

    def test_init_acme_version(self):
        self.response.json.return_value = DIRECTORY_V1.to_json()
        client = self._init()
        self.assertEqual(client.acme_version, 1)

        self.response.json.return_value = DIRECTORY_V2.to_json()
        client = self._init()
        self.assertEqual(client.acme_version, 2)

    def test_query_registration_client_v2(self):
        self.response.json.return_value = DIRECTORY_V2.to_json()
        client = self._init()
        self.response.json.return_value = self.regr.body.to_json()
        self.assertEqual(self.regr, client.query_registration(self.regr))

    def test_forwarding(self):
        self.response.json.return_value = DIRECTORY_V1.to_json()
        client = self._init()
        self.assertEqual(client.directory, client.client.directory)
        self.assertEqual(client.key, KEY)
        self.assertEqual(client.deactivate_registration, client.client.deactivate_registration)
        self.assertRaises(AttributeError, client.__getattr__, 'nonexistent')
        self.assertRaises(AttributeError, client.__getattr__, 'new_account_and_tos')
        self.assertRaises(AttributeError, client.__getattr__, 'new_account')

    def test_new_account_and_tos(self):
        # v2 no tos
        self.response.json.return_value = DIRECTORY_V2.to_json()
        with mock.patch('acme.client.ClientV2') as mock_client:
            client = self._init()
            client.new_account_and_tos(self.new_reg)
            mock_client().new_account.assert_called_with(self.new_reg)

        # v2 tos good
        with mock.patch('acme.client.ClientV2') as mock_client:
            mock_client().directory.meta.__contains__.return_value = True
            client = self._init()
            client.new_account_and_tos(self.new_reg, lambda x: True)
            mock_client().new_account.assert_called_with(
                self.new_reg.update(terms_of_service_agreed=True))

        # v2 tos bad
        with mock.patch('acme.client.ClientV2') as mock_client:
            mock_client().directory.meta.__contains__.return_value = True
            client = self._init()
            def _tos_cb(tos):
                raise errors.Error
            self.assertRaises(errors.Error, client.new_account_and_tos,
                self.new_reg, _tos_cb)
            mock_client().new_account.assert_not_called()

        # v1 yes tos
        self.response.json.return_value = DIRECTORY_V1.to_json()
        with mock.patch('acme.client.Client') as mock_client:
            regr = mock.MagicMock(terms_of_service="TOS")
            mock_client().register.return_value = regr
            client = self._init()
            client.new_account_and_tos(self.new_reg)
            mock_client().register.assert_called_once_with(self.new_reg)
            mock_client().agree_to_tos.assert_called_once_with(regr)

        # v1 no tos
        with mock.patch('acme.client.Client') as mock_client:
            regr = mock.MagicMock(terms_of_service=None)
            mock_client().register.return_value = regr
            client = self._init()
            client.new_account_and_tos(self.new_reg)
            mock_client().register.assert_called_once_with(self.new_reg)
            mock_client().agree_to_tos.assert_not_called()

    @mock.patch('OpenSSL.crypto.load_certificate_request')
    @mock.patch('acme.crypto_util._pyopenssl_cert_or_req_all_names')
    def test_new_order_v1(self, mock__pyopenssl_cert_or_req_all_names,
        unused_mock_load_certificate_request):
        self.response.json.return_value = DIRECTORY_V1.to_json()
        mock__pyopenssl_cert_or_req_all_names.return_value = ['example.com', 'www.example.com']
        mock_csr_pem = mock.MagicMock()
        with mock.patch('acme.client.Client') as mock_client:
            mock_client().request_domain_challenges.return_value = mock.sentinel.auth
            client = self._init()
            orderr = client.new_order(mock_csr_pem)
            self.assertEqual(orderr.authorizations, [mock.sentinel.auth, mock.sentinel.auth])

    def test_new_order_v2(self):
        self.response.json.return_value = DIRECTORY_V2.to_json()
        mock_csr_pem = mock.MagicMock()
        with mock.patch('acme.client.ClientV2') as mock_client:
            client = self._init()
            client.new_order(mock_csr_pem)
            mock_client().new_order.assert_called_once_with(mock_csr_pem)

    @mock.patch('acme.client.Client')
    def test_finalize_order_v1_success(self, mock_client):
        self.response.json.return_value = DIRECTORY_V1.to_json()

        mock_client().request_issuance.return_value = self.certr
        mock_client().fetch_chain.return_value = self.chain

        deadline = datetime.datetime(9999, 9, 9)
        client = self._init()
        result = client.finalize_order(self.orderr, deadline)
        self.assertEqual(result.fullchain_pem, self.fullchain_pem)
        mock_client().fetch_chain.assert_called_once_with(self.certr)

    @mock.patch('acme.client.Client')
    def test_finalize_order_v1_fetch_chain_error(self, mock_client):
        self.response.json.return_value = DIRECTORY_V1.to_json()

        mock_client().request_issuance.return_value = self.certr
        mock_client().fetch_chain.return_value = self.chain
        mock_client().fetch_chain.side_effect = [errors.Error, self.chain]

        deadline = datetime.datetime(9999, 9, 9)
        client = self._init()
        result = client.finalize_order(self.orderr, deadline)
        self.assertEqual(result.fullchain_pem, self.fullchain_pem)
        self.assertEqual(mock_client().fetch_chain.call_count, 2)

    @mock.patch('acme.client.Client')
    def test_finalize_order_v1_timeout(self, mock_client):
        self.response.json.return_value = DIRECTORY_V1.to_json()

        mock_client().request_issuance.return_value = self.certr

        deadline = deadline = datetime.datetime.now() - datetime.timedelta(seconds=60)
        client = self._init()
        self.assertRaises(errors.TimeoutError, client.finalize_order,
            self.orderr, deadline)

    def test_finalize_order_v2(self):
        self.response.json.return_value = DIRECTORY_V2.to_json()
        mock_orderr = mock.MagicMock()
        mock_deadline = mock.MagicMock()
        with mock.patch('acme.client.ClientV2') as mock_client:
            client = self._init()
            client.finalize_order(mock_orderr, mock_deadline)
            mock_client().finalize_order.assert_called_once_with(mock_orderr, mock_deadline)

    def test_revoke(self):
        self.response.json.return_value = DIRECTORY_V1.to_json()
        with mock.patch('acme.client.Client') as mock_client:
            client = self._init()
            client.revoke(messages_test.CERT, self.rsn)
        mock_client().revoke.assert_called_once_with(messages_test.CERT, self.rsn)

        self.response.json.return_value = DIRECTORY_V2.to_json()
        with mock.patch('acme.client.ClientV2') as mock_client:
            client = self._init()
            client.revoke(messages_test.CERT, self.rsn)
        mock_client().revoke.assert_called_once_with(messages_test.CERT, self.rsn)

    def test_update_registration(self):
        self.response.json.return_value = DIRECTORY_V1.to_json()
        with mock.patch('acme.client.Client') as mock_client:
            client = self._init()
            client.update_registration(mock.sentinel.regr, None)
        mock_client().update_registration.assert_called_once_with(mock.sentinel.regr, None)

    # newNonce present means it will pick acme_version 2
    def test_external_account_required_true(self):
        self.response.json.return_value = messages.Directory({
            'newNonce': 'http://letsencrypt-test.com/acme/new-nonce',
            'meta': messages.Directory.Meta(external_account_required=True),
        }).to_json()

        client = self._init()

        self.assertTrue(client.external_account_required())

    # newNonce present means it will pick acme_version 2
    def test_external_account_required_false(self):
        self.response.json.return_value = messages.Directory({
            'newNonce': 'http://letsencrypt-test.com/acme/new-nonce',
            'meta': messages.Directory.Meta(external_account_required=False),
        }).to_json()

        client = self._init()

        self.assertFalse(client.external_account_required())

    def test_external_account_required_false_v1(self):
        self.response.json.return_value = messages.Directory({
            'meta': messages.Directory.Meta(external_account_required=False),
        }).to_json()

        client = self._init()

        self.assertFalse(client.external_account_required())


class ClientTest(ClientTestBase):
    """Tests for acme.client.Client."""

    def setUp(self):
        super(ClientTest, self).setUp()

        self.directory = DIRECTORY_V1

        # Registration
        self.regr = self.regr.update(
            terms_of_service='https://www.letsencrypt-demo.org/tos')

        # Request issuance
        self.certr = messages.CertificateResource(
            body=messages_test.CERT, authzrs=(self.authzr,),
            uri='https://www.letsencrypt-demo.org/acme/cert/1',
            cert_chain_uri='https://www.letsencrypt-demo.org/ca')

        from acme.client import Client
        self.client = Client(
            directory=self.directory, key=KEY, alg=jose.RS256, net=self.net)

    def test_init_downloads_directory(self):
        uri = 'http://www.letsencrypt-demo.org/directory'
        from acme.client import Client
        self.client = Client(
            directory=uri, key=KEY, alg=jose.RS256, net=self.net)
        self.net.get.assert_called_once_with(uri)

    @mock.patch('acme.client.ClientNetwork')
    def test_init_without_net(self, mock_net):
        mock_net.return_value = mock.sentinel.net
        alg = jose.RS256
        from acme.client import Client
        self.client = Client(
            directory=self.directory, key=KEY, alg=alg)
        mock_net.called_once_with(KEY, alg=alg, verify_ssl=True)
        self.assertEqual(self.client.net, mock.sentinel.net)

    def test_register(self):
        # "Instance of 'Field' has no to_json/update member" bug:
        self.response.status_code = http_client.CREATED
        self.response.json.return_value = self.regr.body.to_json()
        self.response.headers['Location'] = self.regr.uri
        self.response.links.update({
            'terms-of-service': {'url': self.regr.terms_of_service},
        })

        self.assertEqual(self.regr, self.client.register(self.new_reg))
        # TODO: test POST call arguments

    def test_update_registration(self):
        # "Instance of 'Field' has no to_json/update member" bug:
        self.response.headers['Location'] = self.regr.uri
        self.response.json.return_value = self.regr.body.to_json()
        self.assertEqual(self.regr, self.client.update_registration(self.regr))
        # TODO: test POST call arguments

        # TODO: split here and separate test
        self.response.json.return_value = self.regr.body.update(
            contact=()).to_json()

    def test_deactivate_account(self):
        self.response.headers['Location'] = self.regr.uri
        self.response.json.return_value = self.regr.body.to_json()
        self.assertEqual(self.regr,
                         self.client.deactivate_registration(self.regr))

    def test_query_registration(self):
        self.response.json.return_value = self.regr.body.to_json()
        self.assertEqual(self.regr, self.client.query_registration(self.regr))

    def test_agree_to_tos(self):
        self.client.update_registration = mock.Mock()
        self.client.agree_to_tos(self.regr)
        regr = self.client.update_registration.call_args[0][0]
        self.assertEqual(self.regr.terms_of_service, regr.body.agreement)

    def _prepare_response_for_request_challenges(self):
        self.response.status_code = http_client.CREATED
        self.response.headers['Location'] = self.authzr.uri
        self.response.json.return_value = self.authz.to_json()

    def test_request_challenges(self):
        self._prepare_response_for_request_challenges()
        self.client.request_challenges(self.identifier)
        self.net.post.assert_called_once_with(
            self.directory.new_authz,
            messages.NewAuthorization(identifier=self.identifier),
            acme_version=1)

    def test_request_challenges_deprecated_arg(self):
        self._prepare_response_for_request_challenges()
        self.client.request_challenges(self.identifier, new_authzr_uri="hi")
        self.net.post.assert_called_once_with(
            self.directory.new_authz,
            messages.NewAuthorization(identifier=self.identifier),
            acme_version=1)

    def test_request_challenges_custom_uri(self):
        self._prepare_response_for_request_challenges()
        self.client.request_challenges(self.identifier)
        self.net.post.assert_called_once_with(
            'https://www.letsencrypt-demo.org/acme/new-authz', mock.ANY,
            acme_version=1)

    def test_request_challenges_unexpected_update(self):
        self._prepare_response_for_request_challenges()
        self.response.json.return_value = self.authz.update(
            identifier=self.identifier.update(value='foo')).to_json()
        self.assertRaises(
            errors.UnexpectedUpdate, self.client.request_challenges,
            self.identifier)

    def test_request_challenges_wildcard(self):
        wildcard_identifier = messages.Identifier(
            typ=messages.IDENTIFIER_FQDN, value='*.example.org')
        self.assertRaises(
            errors.WildcardUnsupportedError, self.client.request_challenges,
            wildcard_identifier)

    def test_request_domain_challenges(self):
        self.client.request_challenges = mock.MagicMock()
        self.assertEqual(
            self.client.request_challenges(self.identifier),
            self.client.request_domain_challenges('example.com'))

    def test_answer_challenge(self):
        self.response.links['up'] = {'url': self.challr.authzr_uri}
        self.response.json.return_value = self.challr.body.to_json()

        chall_response = challenges.DNSResponse(validation=None)

        self.client.answer_challenge(self.challr.body, chall_response)

        # TODO: split here and separate test
        self.assertRaises(errors.UnexpectedUpdate, self.client.answer_challenge,
                          self.challr.body.update(uri='foo'), chall_response)

    def test_answer_challenge_missing_next(self):
        self.assertRaises(
            errors.ClientError, self.client.answer_challenge,
            self.challr.body, challenges.DNSResponse(validation=None))

    def test_retry_after_date(self):
        self.response.headers['Retry-After'] = 'Fri, 31 Dec 1999 23:59:59 GMT'
        self.assertEqual(
            datetime.datetime(1999, 12, 31, 23, 59, 59),
            self.client.retry_after(response=self.response, default=10))

    @mock.patch('acme.client.datetime')
    def test_retry_after_invalid(self, dt_mock):
        dt_mock.datetime.now.return_value = datetime.datetime(2015, 3, 27)
        dt_mock.timedelta = datetime.timedelta

        self.response.headers['Retry-After'] = 'foooo'
        self.assertEqual(
            datetime.datetime(2015, 3, 27, 0, 0, 10),
            self.client.retry_after(response=self.response, default=10))

    @mock.patch('acme.client.datetime')
    def test_retry_after_overflow(self, dt_mock):
        dt_mock.datetime.now.return_value = datetime.datetime(2015, 3, 27)
        dt_mock.timedelta = datetime.timedelta
        dt_mock.datetime.side_effect = datetime.datetime

        self.response.headers['Retry-After'] = "Tue, 116 Feb 2016 11:50:00 MST"
        self.assertEqual(
            datetime.datetime(2015, 3, 27, 0, 0, 10),
            self.client.retry_after(response=self.response, default=10))

    @mock.patch('acme.client.datetime')
    def test_retry_after_seconds(self, dt_mock):
        dt_mock.datetime.now.return_value = datetime.datetime(2015, 3, 27)
        dt_mock.timedelta = datetime.timedelta

        self.response.headers['Retry-After'] = '50'
        self.assertEqual(
            datetime.datetime(2015, 3, 27, 0, 0, 50),
            self.client.retry_after(response=self.response, default=10))

    @mock.patch('acme.client.datetime')
    def test_retry_after_missing(self, dt_mock):
        dt_mock.datetime.now.return_value = datetime.datetime(2015, 3, 27)
        dt_mock.timedelta = datetime.timedelta

        self.assertEqual(
            datetime.datetime(2015, 3, 27, 0, 0, 10),
            self.client.retry_after(response=self.response, default=10))

    def test_poll(self):
        self.response.json.return_value = self.authzr.body.to_json()
        self.assertEqual((self.authzr, self.response),
                         self.client.poll(self.authzr))

        # TODO: split here and separate test
        self.response.json.return_value = self.authz.update(
            identifier=self.identifier.update(value='foo')).to_json()
        self.assertRaises(
            errors.UnexpectedUpdate, self.client.poll, self.authzr)

    def test_request_issuance(self):
        self.response.content = CERT_DER
        self.response.headers['Location'] = self.certr.uri
        self.response.links['up'] = {'url': self.certr.cert_chain_uri}
        self.assertEqual(self.certr, self.client.request_issuance(
            messages_test.CSR, (self.authzr,)))
        # TODO: check POST args

    def test_request_issuance_missing_up(self):
        self.response.content = CERT_DER
        self.response.headers['Location'] = self.certr.uri
        self.assertEqual(
            self.certr.update(cert_chain_uri=None),
            self.client.request_issuance(messages_test.CSR, (self.authzr,)))

    def test_request_issuance_missing_location(self):
        self.assertRaises(
            errors.ClientError, self.client.request_issuance,
            messages_test.CSR, (self.authzr,))

    @mock.patch('acme.client.datetime')
    @mock.patch('acme.client.time')
    def test_poll_and_request_issuance(self, time_mock, dt_mock):
        # clock.dt | pylint: disable=no-member
        clock = mock.MagicMock(dt=datetime.datetime(2015, 3, 27))

        def sleep(seconds):
            """increment clock"""
            clock.dt += datetime.timedelta(seconds=seconds)
        time_mock.sleep.side_effect = sleep

        def now():
            """return current clock value"""
            return clock.dt
        dt_mock.datetime.now.side_effect = now
        dt_mock.timedelta = datetime.timedelta

        def poll(authzr):  # pylint: disable=missing-docstring
            # record poll start time based on the current clock value
            authzr.times.append(clock.dt)

            # suppose it takes 2 seconds for server to produce the
            # result, increment clock
            clock.dt += datetime.timedelta(seconds=2)

            if len(authzr.retries) == 1:  # no more retries
                done = mock.MagicMock(uri=authzr.uri, times=authzr.times)
                done.body.status = authzr.retries[0]
                return done, []

            # response (2nd result tuple element) is reduced to only
            # Retry-After header contents represented as integer
            # seconds; authzr.retries is a list of Retry-After
            # headers, head(retries) is peeled of as a current
            # Retry-After header, and tail(retries) is persisted for
            # later poll() calls
            return (mock.MagicMock(retries=authzr.retries[1:],
                                   uri=authzr.uri + '.', times=authzr.times),
                    authzr.retries[0])
        self.client.poll = mock.MagicMock(side_effect=poll)

        mintime = 7

        def retry_after(response, default):
            # pylint: disable=missing-docstring
            # check that poll_and_request_issuance correctly passes mintime
            self.assertEqual(default, mintime)
            return clock.dt + datetime.timedelta(seconds=response)
        self.client.retry_after = mock.MagicMock(side_effect=retry_after)

        def request_issuance(csr, authzrs):  # pylint: disable=missing-docstring
            return csr, authzrs
        self.client.request_issuance = mock.MagicMock(
            side_effect=request_issuance)

        csr = mock.MagicMock()
        authzrs = (
            mock.MagicMock(uri='a', times=[], retries=(
                8, 20, 30, messages.STATUS_VALID)),
            mock.MagicMock(uri='b', times=[], retries=(
                5, messages.STATUS_VALID)),
        )

        cert, updated_authzrs = self.client.poll_and_request_issuance(
            csr, authzrs, mintime=mintime,
            # make sure that max_attempts is per-authorization, rather
            # than global
            max_attempts=max(len(authzrs[0].retries), len(authzrs[1].retries)))
        self.assertTrue(cert[0] is csr)
        self.assertTrue(cert[1] is updated_authzrs)
        self.assertEqual(updated_authzrs[0].uri, 'a...')
        self.assertEqual(updated_authzrs[1].uri, 'b.')
        self.assertEqual(updated_authzrs[0].times, [
            datetime.datetime(2015, 3, 27),
            # a is scheduled for 10, but b is polling [9..11), so it
            # will be picked up as soon as b is finished, without
            # additional sleeping
            datetime.datetime(2015, 3, 27, 0, 0, 11),
            datetime.datetime(2015, 3, 27, 0, 0, 33),
            datetime.datetime(2015, 3, 27, 0, 1, 5),
        ])
        self.assertEqual(updated_authzrs[1].times, [
            datetime.datetime(2015, 3, 27, 0, 0, 2),
            datetime.datetime(2015, 3, 27, 0, 0, 9),
        ])
        self.assertEqual(clock.dt, datetime.datetime(2015, 3, 27, 0, 1, 7))

        # CA sets invalid | TODO: move to a separate test
        invalid_authzr = mock.MagicMock(
            times=[], retries=[messages.STATUS_INVALID])
        self.assertRaises(
            errors.PollError, self.client.poll_and_request_issuance,
            csr, authzrs=(invalid_authzr,), mintime=mintime)

        # exceeded max_attempts | TODO: move to a separate test
        self.assertRaises(
            errors.PollError, self.client.poll_and_request_issuance,
            csr, authzrs, mintime=mintime, max_attempts=2)

    def test_deactivate_authorization(self):
        authzb = self.authzr.body.update(status=messages.STATUS_DEACTIVATED)
        self.response.json.return_value = authzb.to_json()
        authzr = self.client.deactivate_authorization(self.authzr)
        self.assertEqual(authzb, authzr.body)
        self.assertEqual(self.client.net.post.call_count, 1)
        self.assertTrue(self.authzr.uri in self.net.post.call_args_list[0][0])

    def test_check_cert(self):
        self.response.headers['Location'] = self.certr.uri
        self.response.content = CERT_DER
        self.assertEqual(self.certr.update(body=messages_test.CERT),
                         self.client.check_cert(self.certr))

        # TODO: split here and separate test
        self.response.headers['Location'] = 'foo'
        self.assertRaises(
            errors.UnexpectedUpdate, self.client.check_cert, self.certr)

    def test_check_cert_missing_location(self):
        self.response.content = CERT_DER
        self.assertRaises(
            errors.ClientError, self.client.check_cert, self.certr)

    def test_refresh(self):
        self.client.check_cert = mock.MagicMock()
        self.assertEqual(
            self.client.check_cert(self.certr), self.client.refresh(self.certr))

    def test_fetch_chain_no_up_link(self):
        self.assertEqual([], self.client.fetch_chain(self.certr.update(
            cert_chain_uri=None)))

    def test_fetch_chain_single(self):
        # pylint: disable=protected-access
        self.client._get_cert = mock.MagicMock()
        self.client._get_cert.return_value = (
            mock.MagicMock(links={}), "certificate")
        self.assertEqual([self.client._get_cert(self.certr.cert_chain_uri)[1]],
                         self.client.fetch_chain(self.certr))

    def test_fetch_chain_max(self):
        # pylint: disable=protected-access
        up_response = mock.MagicMock(links={'up': {'url': 'http://cert'}})
        noup_response = mock.MagicMock(links={})
        self.client._get_cert = mock.MagicMock()
        self.client._get_cert.side_effect = [
            (up_response, "cert")] * 9 + [(noup_response, "last_cert")]
        chain = self.client.fetch_chain(self.certr, max_length=10)
        self.assertEqual(chain, ["cert"] * 9 + ["last_cert"])

    def test_fetch_chain_too_many(self):  # recursive
        # pylint: disable=protected-access
        response = mock.MagicMock(links={'up': {'url': 'http://cert'}})
        self.client._get_cert = mock.MagicMock()
        self.client._get_cert.return_value = (response, "certificate")
        self.assertRaises(errors.Error, self.client.fetch_chain, self.certr)

    def test_revoke(self):
        self.client.revoke(self.certr.body, self.rsn)
        self.net.post.assert_called_once_with(
            self.directory[messages.Revocation], mock.ANY, acme_version=1)

    def test_revocation_payload(self):
        obj = messages.Revocation(certificate=self.certr.body, reason=self.rsn)
        self.assertTrue('reason' in obj.to_partial_json().keys())
        self.assertEqual(self.rsn, obj.to_partial_json()['reason'])

    def test_revoke_bad_status_raises_error(self):
        self.response.status_code = http_client.METHOD_NOT_ALLOWED
        self.assertRaises(
            errors.ClientError,
            self.client.revoke,
            self.certr,
            self.rsn)


class ClientV2Test(ClientTestBase):
    """Tests for acme.client.ClientV2."""

    def setUp(self):
        super(ClientV2Test, self).setUp()

        self.directory = DIRECTORY_V2

        from acme.client import ClientV2
        self.client = ClientV2(self.directory, self.net)

        self.new_reg = self.new_reg.update(terms_of_service_agreed=True)

        self.authzr_uri2 = 'https://www.letsencrypt-demo.org/acme/authz/2'
        self.authz2 = self.authz.update(identifier=messages.Identifier(
            typ=messages.IDENTIFIER_FQDN, value='www.example.com'),
            status=messages.STATUS_PENDING)
        self.authzr2 = messages.AuthorizationResource(
            body=self.authz2, uri=self.authzr_uri2)

        self.order = messages.Order(
            identifiers=(self.authz.identifier, self.authz2.identifier),
            status=messages.STATUS_PENDING,
            authorizations=(self.authzr.uri, self.authzr_uri2),
            finalize='https://www.letsencrypt-demo.org/acme/acct/1/order/1/finalize')
        self.orderr = messages.OrderResource(
            body=self.order,
            uri='https://www.letsencrypt-demo.org/acme/acct/1/order/1',
            authorizations=[self.authzr, self.authzr2], csr_pem=CSR_SAN_PEM)

    def test_new_account(self):
        self.response.status_code = http_client.CREATED
        self.response.json.return_value = self.regr.body.to_json()
        self.response.headers['Location'] = self.regr.uri

        self.assertEqual(self.regr, self.client.new_account(self.new_reg))

    def test_new_account_conflict(self):
        self.response.status_code = http_client.OK
        self.response.headers['Location'] = self.regr.uri
        self.assertRaises(errors.ConflictError, self.client.new_account, self.new_reg)

    def test_new_order(self):
        order_response = copy.deepcopy(self.response)
        order_response.status_code = http_client.CREATED
        order_response.json.return_value = self.order.to_json()
        order_response.headers['Location'] = self.orderr.uri
        self.net.post.return_value = order_response

        authz_response = copy.deepcopy(self.response)
        authz_response.json.return_value = self.authz.to_json()
        authz_response.headers['Location'] = self.authzr.uri
        authz_response2 = self.response
        authz_response2.json.return_value = self.authz2.to_json()
        authz_response2.headers['Location'] = self.authzr2.uri

        with mock.patch('acme.client.ClientV2._post_as_get') as mock_post_as_get:
            mock_post_as_get.side_effect = (authz_response, authz_response2)
            self.assertEqual(self.client.new_order(CSR_SAN_PEM), self.orderr)

    @mock.patch('acme.client.datetime')
    def test_poll_and_finalize(self, mock_datetime):
        mock_datetime.datetime.now.return_value = datetime.datetime(2018, 2, 15)
        mock_datetime.timedelta = datetime.timedelta
        expected_deadline = mock_datetime.datetime.now() + datetime.timedelta(seconds=90)

        self.client.poll_authorizations = mock.Mock(return_value=self.orderr)
        self.client.finalize_order = mock.Mock(return_value=self.orderr)

        self.assertEqual(self.client.poll_and_finalize(self.orderr), self.orderr)
        self.client.poll_authorizations.assert_called_once_with(self.orderr, expected_deadline)
        self.client.finalize_order.assert_called_once_with(self.orderr, expected_deadline)

    @mock.patch('acme.client.datetime')
    def test_poll_authorizations_timeout(self, mock_datetime):
        now_side_effect = [datetime.datetime(2018, 2, 15),
                           datetime.datetime(2018, 2, 16),
                           datetime.datetime(2018, 2, 17)]
        mock_datetime.datetime.now.side_effect = now_side_effect
        self.response.json.side_effect = [
            self.authz.to_json(), self.authz2.to_json(), self.authz2.to_json()]

        self.assertRaises(
            errors.TimeoutError, self.client.poll_authorizations, self.orderr, now_side_effect[1])

    def test_poll_authorizations_failure(self):
        deadline = datetime.datetime(9999, 9, 9)
        challb = self.challr.body.update(status=messages.STATUS_INVALID,
                                         error=messages.Error.with_code('unauthorized'))
        authz = self.authz.update(status=messages.STATUS_INVALID, challenges=(challb,))
        self.response.json.return_value = authz.to_json()

        self.assertRaises(
            errors.ValidationError, self.client.poll_authorizations, self.orderr, deadline)

    def test_poll_authorizations_success(self):
        deadline = datetime.datetime(9999, 9, 9)
        updated_authz2 = self.authz2.update(status=messages.STATUS_VALID)
        updated_authzr2 = messages.AuthorizationResource(
            body=updated_authz2, uri=self.authzr_uri2)
        updated_orderr = self.orderr.update(authorizations=[self.authzr, updated_authzr2])

        self.response.json.side_effect = (
            self.authz.to_json(), self.authz2.to_json(), updated_authz2.to_json())
        self.assertEqual(self.client.poll_authorizations(self.orderr, deadline), updated_orderr)

    def test_finalize_order_success(self):
        updated_order = self.order.update(
            certificate='https://www.letsencrypt-demo.org/acme/cert/')
        updated_orderr = self.orderr.update(body=updated_order, fullchain_pem=CERT_SAN_PEM)

        self.response.json.return_value = updated_order.to_json()
        self.response.text = CERT_SAN_PEM

        deadline = datetime.datetime(9999, 9, 9)
        self.assertEqual(self.client.finalize_order(self.orderr, deadline), updated_orderr)

    def test_finalize_order_error(self):
        updated_order = self.order.update(error=messages.Error.with_code('unauthorized'))
        self.response.json.return_value = updated_order.to_json()

        deadline = datetime.datetime(9999, 9, 9)
        self.assertRaises(errors.IssuanceError, self.client.finalize_order, self.orderr, deadline)

    def test_finalize_order_timeout(self):
        deadline = datetime.datetime.now() - datetime.timedelta(seconds=60)
        self.assertRaises(errors.TimeoutError, self.client.finalize_order, self.orderr, deadline)

    def test_revoke(self):
        self.client.revoke(messages_test.CERT, self.rsn)
        self.net.post.assert_called_once_with(
            self.directory["revokeCert"], mock.ANY, acme_version=2,
            new_nonce_url=DIRECTORY_V2['newNonce'])

    def test_update_registration(self):
        # "Instance of 'Field' has no to_json/update member" bug:
        self.response.headers['Location'] = self.regr.uri
        self.response.json.return_value = self.regr.body.to_json()
        self.assertEqual(self.regr, self.client.update_registration(self.regr))
        self.assertNotEqual(self.client.net.account, None)
        self.assertEqual(self.client.net.post.call_count, 2)
        self.assertTrue(DIRECTORY_V2.newAccount in self.net.post.call_args_list[0][0])

        self.response.json.return_value = self.regr.body.update(
            contact=()).to_json()

    def test_external_account_required_true(self):
        self.client.directory = messages.Directory({
            'meta': messages.Directory.Meta(external_account_required=True)
        })

        self.assertTrue(self.client.external_account_required())

    def test_external_account_required_false(self):
        self.client.directory = messages.Directory({
            'meta': messages.Directory.Meta(external_account_required=False)
        })

        self.assertFalse(self.client.external_account_required())

    def test_external_account_required_default(self):
        self.assertFalse(self.client.external_account_required())

    def test_post_as_get(self):
        with mock.patch('acme.client.ClientV2._authzr_from_response') as mock_client:
            mock_client.return_value = self.authzr2

            self.client.poll(self.authzr2)  # pylint: disable=protected-access

            self.client.net.post.assert_called_once_with(
                self.authzr2.uri, None, acme_version=2,
                new_nonce_url='https://www.letsencrypt-demo.org/acme/new-nonce')
            self.client.net.get.assert_not_called()

            class FakeError(messages.Error):
                """Fake error to reproduce a malformed request ACME error"""
                def __init__(self):  # pylint: disable=super-init-not-called
                    pass
                @property
                def code(self):
                    return 'malformed'
            self.client.net.post.side_effect = FakeError()

            self.client.poll(self.authzr2)  # pylint: disable=protected-access

            self.client.net.get.assert_called_once_with(self.authzr2.uri)


class MockJSONDeSerializable(jose.JSONDeSerializable):
    # pylint: disable=missing-docstring
    def __init__(self, value):
        self.value = value

    def to_partial_json(self):
        return {'foo': self.value}

    @classmethod
    def from_json(cls, jobj):
        pass  # pragma: no cover


class ClientNetworkTest(unittest.TestCase):
    """Tests for acme.client.ClientNetwork."""

    def setUp(self):
        self.verify_ssl = mock.MagicMock()
        self.wrap_in_jws = mock.MagicMock(return_value=mock.sentinel.wrapped)

        from acme.client import ClientNetwork
        self.net = ClientNetwork(
            key=KEY, alg=jose.RS256, verify_ssl=self.verify_ssl,
            user_agent='acme-python-test')

        self.response = mock.MagicMock(ok=True, status_code=http_client.OK)
        self.response.headers = {}
        self.response.links = {}

    def test_init(self):
        self.assertTrue(self.net.verify_ssl is self.verify_ssl)

    def test_wrap_in_jws(self):
        # pylint: disable=protected-access
        jws_dump = self.net._wrap_in_jws(
            MockJSONDeSerializable('foo'), nonce=b'Tg', url="url",
            acme_version=1)
        jws = acme_jws.JWS.json_loads(jws_dump)
        self.assertEqual(json.loads(jws.payload.decode()), {'foo': 'foo'})
        self.assertEqual(jws.signature.combined.nonce, b'Tg')

    def test_wrap_in_jws_v2(self):
        self.net.account = {'uri': 'acct-uri'}
        # pylint: disable=protected-access
        jws_dump = self.net._wrap_in_jws(
            MockJSONDeSerializable('foo'), nonce=b'Tg', url="url",
            acme_version=2)
        jws = acme_jws.JWS.json_loads(jws_dump)
        self.assertEqual(json.loads(jws.payload.decode()), {'foo': 'foo'})
        self.assertEqual(jws.signature.combined.nonce, b'Tg')
        self.assertEqual(jws.signature.combined.kid, u'acct-uri')
        self.assertEqual(jws.signature.combined.url, u'url')

    def test_check_response_not_ok_jobj_no_error(self):
        self.response.ok = False
        self.response.json.return_value = {}
        with mock.patch('acme.client.messages.Error.from_json') as from_json:
            from_json.side_effect = jose.DeserializationError
            # pylint: disable=protected-access
            self.assertRaises(
                errors.ClientError, self.net._check_response, self.response)

    def test_check_response_not_ok_jobj_error(self):
        self.response.ok = False
        self.response.json.return_value = messages.Error.with_code(
            'serverInternal', detail='foo', title='some title').to_json()
        # pylint: disable=protected-access
        self.assertRaises(
            messages.Error, self.net._check_response, self.response)

    def test_check_response_not_ok_no_jobj(self):
        self.response.ok = False
        self.response.json.side_effect = ValueError
        # pylint: disable=protected-access
        self.assertRaises(
            errors.ClientError, self.net._check_response, self.response)

    def test_check_response_ok_no_jobj_ct_required(self):
        self.response.json.side_effect = ValueError
        for response_ct in [self.net.JSON_CONTENT_TYPE, 'foo']:
            self.response.headers['Content-Type'] = response_ct
            # pylint: disable=protected-access
            self.assertRaises(
                errors.ClientError, self.net._check_response, self.response,
                content_type=self.net.JSON_CONTENT_TYPE)

    def test_check_response_ok_no_jobj_no_ct(self):
        self.response.json.side_effect = ValueError
        for response_ct in [self.net.JSON_CONTENT_TYPE, 'foo']:
            self.response.headers['Content-Type'] = response_ct
            # pylint: disable=protected-access
            self.assertEqual(
                self.response, self.net._check_response(self.response))

    def test_check_response_conflict(self):
        self.response.ok = False
        self.response.status_code = 409
        # pylint: disable=protected-access
        self.assertRaises(errors.ConflictError, self.net._check_response, self.response)

    def test_check_response_jobj(self):
        self.response.json.return_value = {}
        for response_ct in [self.net.JSON_CONTENT_TYPE, 'foo']:
            self.response.headers['Content-Type'] = response_ct
            # pylint: disable=protected-access
            self.assertEqual(
                self.response, self.net._check_response(self.response))

    def test_send_request(self):
        self.net.session = mock.MagicMock()
        self.net.session.request.return_value = self.response
        # pylint: disable=protected-access
        self.assertEqual(self.response, self.net._send_request(
            'HEAD', 'http://example.com/', 'foo', bar='baz'))
        self.net.session.request.assert_called_once_with(
            'HEAD', 'http://example.com/', 'foo',
            headers=mock.ANY, verify=mock.ANY, timeout=mock.ANY, bar='baz')

    @mock.patch('acme.client.logger')
    def test_send_request_get_der(self, mock_logger):
        self.net.session = mock.MagicMock()
        self.net.session.request.return_value = mock.MagicMock(
            ok=True, status_code=http_client.OK,
            headers={"Content-Type": "application/pkix-cert"},
            content=b"hi")
        # pylint: disable=protected-access
        self.net._send_request('HEAD', 'http://example.com/', 'foo',
          timeout=mock.ANY, bar='baz')
        mock_logger.debug.assert_called_with(
            'Received response:\nHTTP %d\n%s\n\n%s', 200,
            'Content-Type: application/pkix-cert', b'aGk=')

    def test_send_request_post(self):
        self.net.session = mock.MagicMock()
        self.net.session.request.return_value = self.response
        # pylint: disable=protected-access
        self.assertEqual(self.response, self.net._send_request(
            'POST', 'http://example.com/', 'foo', data='qux', bar='baz'))
        self.net.session.request.assert_called_once_with(
            'POST', 'http://example.com/', 'foo',
            headers=mock.ANY, verify=mock.ANY, timeout=mock.ANY, data='qux', bar='baz')

    def test_send_request_verify_ssl(self):
        # pylint: disable=protected-access
        for verify in True, False:
            self.net.session = mock.MagicMock()
            self.net.session.request.return_value = self.response
            self.net.verify_ssl = verify
            # pylint: disable=protected-access
            self.assertEqual(
                self.response,
                self.net._send_request('GET', 'http://example.com/'))
            self.net.session.request.assert_called_once_with(
                'GET', 'http://example.com/', verify=verify,
                timeout=mock.ANY, headers=mock.ANY)

    def test_send_request_user_agent(self):
        self.net.session = mock.MagicMock()
        # pylint: disable=protected-access
        self.net._send_request('GET', 'http://example.com/',
                               headers={'bar': 'baz'})
        self.net.session.request.assert_called_once_with(
            'GET', 'http://example.com/', verify=mock.ANY,
            timeout=mock.ANY,
            headers={'User-Agent': 'acme-python-test', 'bar': 'baz'})

        self.net._send_request('GET', 'http://example.com/',
                               headers={'User-Agent': 'foo2'})
        self.net.session.request.assert_called_with(
            'GET', 'http://example.com/',
            verify=mock.ANY, timeout=mock.ANY, headers={'User-Agent': 'foo2'})

    def test_send_request_timeout(self):
        self.net.session = mock.MagicMock()
        # pylint: disable=protected-access
        self.net._send_request('GET', 'http://example.com/',
                               headers={'bar': 'baz'})
        self.net.session.request.assert_called_once_with(
            mock.ANY, mock.ANY, verify=mock.ANY, headers=mock.ANY,
            timeout=45)

    def test_del(self, close_exception=None):
        sess = mock.MagicMock()

        if close_exception is not None:
            sess.close.side_effect = close_exception

        self.net.session = sess
        del self.net
        sess.close.assert_called_once_with()

    def test_del_error(self):
        self.test_del(ReferenceError)

    @mock.patch('acme.client.requests')
    def test_requests_error_passthrough(self, mock_requests):
        mock_requests.exceptions = requests.exceptions
        mock_requests.request.side_effect = requests.exceptions.RequestException
        # pylint: disable=protected-access
        self.assertRaises(requests.exceptions.RequestException,
                          self.net._send_request, 'GET', 'uri')

    def test_urllib_error(self):
        # Using a connection error to test a properly formatted error message
        try:
            # pylint: disable=protected-access
            self.net._send_request('GET', "http://localhost:19123/nonexistent.txt")

        # Value Error Generated Exceptions
        except ValueError as y:
            self.assertEqual("Requesting localhost/nonexistent: "
                             "Connection refused", str(y))

        # Requests Library Exceptions
        except requests.exceptions.ConnectionError as z: #pragma: no cover
            self.assertTrue("'Connection aborted.'" in str(z) or "[WinError 10061]" in str(z))


class ClientNetworkWithMockedResponseTest(unittest.TestCase):
    """Tests for acme.client.ClientNetwork which mock out response."""

    def setUp(self):
        from acme.client import ClientNetwork
        self.net = ClientNetwork(key=None, alg=None)

        self.response = mock.MagicMock(ok=True, status_code=http_client.OK)
        self.response.headers = {}
        self.response.links = {}
        self.response.checked = False
        self.acmev1_nonce_response = mock.MagicMock(
            ok=False, status_code=http_client.METHOD_NOT_ALLOWED)
        self.acmev1_nonce_response.headers = {}
        self.obj = mock.MagicMock()
        self.wrapped_obj = mock.MagicMock()
        self.content_type = mock.sentinel.content_type

        self.all_nonces = [
            jose.b64encode(b'Nonce'),
            jose.b64encode(b'Nonce2'), jose.b64encode(b'Nonce3')]
        self.available_nonces = self.all_nonces[:]

        def send_request(*args, **kwargs):
            # pylint: disable=unused-argument,missing-docstring
            self.assertFalse("new_nonce_url" in kwargs)
            method = args[0]
            uri = args[1]
            if method == 'HEAD' and uri != "new_nonce_uri":
                response = self.acmev1_nonce_response
            else:
                response = self.response

            if self.available_nonces:
                response.headers = {
                    self.net.REPLAY_NONCE_HEADER:
                    self.available_nonces.pop().decode()}
            else:
                response.headers = {}
            return response

        # pylint: disable=protected-access
        self.net._send_request = self.send_request = mock.MagicMock(
            side_effect=send_request)
        self.net._check_response = self.check_response
        self.net._wrap_in_jws = mock.MagicMock(return_value=self.wrapped_obj)

    def check_response(self, response, content_type):
        # pylint: disable=missing-docstring
        self.assertEqual(self.response, response)
        self.assertEqual(self.content_type, content_type)
        self.assertTrue(self.response.ok)
        self.response.checked = True
        return self.response

    def test_head(self):
        self.assertEqual(self.acmev1_nonce_response, self.net.head(
            'http://example.com/', 'foo', bar='baz'))
        self.send_request.assert_called_once_with(
            'HEAD', 'http://example.com/', 'foo', bar='baz')

    def test_head_v2(self):
        self.assertEqual(self.response, self.net.head(
            'new_nonce_uri', 'foo', bar='baz'))
        self.send_request.assert_called_once_with(
            'HEAD', 'new_nonce_uri', 'foo', bar='baz')

    def test_get(self):
        self.assertEqual(self.response, self.net.get(
            'http://example.com/', content_type=self.content_type, bar='baz'))
        self.assertTrue(self.response.checked)
        self.send_request.assert_called_once_with(
            'GET', 'http://example.com/', bar='baz')

    def test_post_no_content_type(self):
        self.content_type = self.net.JOSE_CONTENT_TYPE
        self.assertEqual(self.response, self.net.post('uri', self.obj))
        self.assertTrue(self.response.checked)

    def test_post(self):
        # pylint: disable=protected-access
        self.assertEqual(self.response, self.net.post(
            'uri', self.obj, content_type=self.content_type))
        self.assertTrue(self.response.checked)
        self.net._wrap_in_jws.assert_called_once_with(
            self.obj, jose.b64decode(self.all_nonces.pop()), "uri", 1)

        self.available_nonces = []
        self.assertRaises(errors.MissingNonce, self.net.post,
                          'uri', self.obj, content_type=self.content_type)
        self.net._wrap_in_jws.assert_called_with(
            self.obj, jose.b64decode(self.all_nonces.pop()), "uri", 1)

    def test_post_wrong_initial_nonce(self):  # HEAD
        self.available_nonces = [b'f', jose.b64encode(b'good')]
        self.assertRaises(errors.BadNonce, self.net.post, 'uri',
                          self.obj, content_type=self.content_type)

    def test_post_wrong_post_response_nonce(self):
        self.available_nonces = [jose.b64encode(b'good'), b'f']
        self.assertRaises(errors.BadNonce, self.net.post, 'uri',
                          self.obj, content_type=self.content_type)

    def test_post_failed_retry(self):
        check_response = mock.MagicMock()
        check_response.side_effect = messages.Error.with_code('badNonce')

        # pylint: disable=protected-access
        self.net._check_response = check_response
        self.assertRaises(messages.Error, self.net.post, 'uri',
                          self.obj, content_type=self.content_type)

    def test_post_not_retried(self):
        check_response = mock.MagicMock()
        check_response.side_effect = [messages.Error.with_code('malformed'),
                                      self.response]

        # pylint: disable=protected-access
        self.net._check_response = check_response
        self.assertRaises(messages.Error, self.net.post, 'uri',
                          self.obj, content_type=self.content_type)

    def test_post_successful_retry(self):
        post_once = mock.MagicMock()
        post_once.side_effect = [messages.Error.with_code('badNonce'),
                                      self.response]

        # pylint: disable=protected-access
        self.assertEqual(self.response, self.net.post(
            'uri', self.obj, content_type=self.content_type))

    def test_head_get_post_error_passthrough(self):
        self.send_request.side_effect = requests.exceptions.RequestException
        for method in self.net.head, self.net.get:
            self.assertRaises(
                requests.exceptions.RequestException, method, 'GET', 'uri')
        self.assertRaises(requests.exceptions.RequestException,
                          self.net.post, 'uri', obj=self.obj)

    def test_post_bad_nonce_head(self):
        # pylint: disable=protected-access
        # regression test for https://github.com/certbot/certbot/issues/6092
        bad_response = mock.MagicMock(ok=False, status_code=http_client.SERVICE_UNAVAILABLE)
        self.net._send_request = mock.MagicMock()
        self.net._send_request.return_value = bad_response
        self.content_type = None
        check_response = mock.MagicMock()
        self.net._check_response = check_response
        self.assertRaises(errors.ClientError, self.net.post, 'uri',
                          self.obj, content_type=self.content_type, acme_version=2,
                          new_nonce_url='new_nonce_uri')
        self.assertEqual(check_response.call_count, 1)

    def test_new_nonce_uri_removed(self):
        self.content_type = None
        self.net.post('uri', self.obj, content_type=None,
            acme_version=2, new_nonce_url='new_nonce_uri')


class ClientNetworkSourceAddressBindingTest(unittest.TestCase):
    """Tests that if ClientNetwork has a source IP set manually, the underlying library has
    used the provided source address."""

    def setUp(self):
        self.source_address = "8.8.8.8"

    def test_source_address_set(self):
        from acme.client import ClientNetwork
        net = ClientNetwork(key=None, alg=None, source_address=self.source_address)
        for adapter in net.session.adapters.values():
            self.assertTrue(self.source_address in adapter.source_address)

    def test_behavior_assumption(self):
        """This is a test that guardrails the HTTPAdapter behavior so that if the default for
        a Session() changes, the assumptions here aren't violated silently."""
        from acme.client import ClientNetwork
        # Source address not specified, so the default adapter type should be bound -- this
        # test should fail if the default adapter type is changed by requests
        net = ClientNetwork(key=None, alg=None)
        session = requests.Session()
        for scheme in session.adapters.keys():
            client_network_adapter = net.session.adapters.get(scheme)
            default_adapter = session.adapters.get(scheme)
            self.assertEqual(client_network_adapter.__class__, default_adapter.__class__)

if __name__ == '__main__':
    unittest.main()  # pragma: no cover