"""Tests for certbot.storage."""
# pylint disable=protected-access
import datetime
import os
import shutil
import tempfile
import unittest

import configobj
import mock
import pytz

import certbot
from certbot import cli
from certbot import configuration
from certbot import errors
from certbot.storage import ALL_FOUR

from certbot.tests import test_util


CERT = test_util.load_cert('cert.pem')


def unlink_all(rc_object):
    """Unlink all four items associated with this RenewableCert."""
    for kind in ALL_FOUR:
        os.unlink(getattr(rc_object, kind))


def fill_with_sample_data(rc_object):
    """Put dummy data into all four files of this RenewableCert."""
    for kind in ALL_FOUR:
        with open(getattr(rc_object, kind), "w") as f:
            f.write(kind)


class BaseRenewableCertTest(unittest.TestCase):
    """Base class for setting up Renewable Cert tests.

    .. note:: It may be required to write out self.config for
    your test.  Check :class:`.cli_test.DuplicateCertTest` for an example.

    """
    def setUp(self):
        from certbot import storage
        self.tempdir = tempfile.mkdtemp()

        self.cli_config = configuration.RenewerConfiguration(
            namespace=mock.MagicMock(
                config_dir=self.tempdir,
                work_dir=self.tempdir,
                logs_dir=self.tempdir,
            )
        )

        # TODO: maybe provide RenewerConfiguration.make_dirs?
        # TODO: main() should create those dirs, c.f. #902
        os.makedirs(os.path.join(self.tempdir, "live", "example.org"))
        os.makedirs(os.path.join(self.tempdir, "archive", "example.org"))
        os.makedirs(os.path.join(self.tempdir, "renewal"))

        config = configobj.ConfigObj()
        for kind in ALL_FOUR:
            config[kind] = os.path.join(self.tempdir, "live", "example.org",
                                        kind + ".pem")
        config.filename = os.path.join(self.tempdir, "renewal",
                                       "example.org.conf")
        config.write()
        self.config = config

        # We also create a file that isn't a renewal config in the same
        # location to test that logic that reads in all-and-only renewal
        # configs will ignore it and NOT attempt to parse it.
        junk = open(os.path.join(self.tempdir, "renewal", "IGNORE.THIS"), "w")
        junk.write("This file should be ignored!")
        junk.close()

        self.defaults = configobj.ConfigObj()

        with mock.patch("certbot.storage.RenewableCert._check_symlinks") as check:
            check.return_value = True
            self.test_rc = storage.RenewableCert(config.filename, self.cli_config)

    def tearDown(self):
        shutil.rmtree(self.tempdir)

    def _write_out_kind(self, kind, ver, value=None):
        link = getattr(self.test_rc, kind)
        if os.path.lexists(link):
            os.unlink(link)
        os.symlink(os.path.join(os.path.pardir, os.path.pardir, "archive",
                                "example.org", "{0}{1}.pem".format(kind, ver)),
                   link)
        with open(link, "w") as f:
            f.write(kind if value is None else value)

    def _write_out_ex_kinds(self):
        for kind in ALL_FOUR:
            self._write_out_kind(kind, 12)
            self._write_out_kind(kind, 11)


class RenewableCertTests(BaseRenewableCertTest):
    # pylint: disable=too-many-public-methods
    """Tests for certbot.storage."""

    def test_initialization(self):
        self.assertEqual(self.test_rc.lineagename, "example.org")
        for kind in ALL_FOUR:
            self.assertEqual(
                getattr(self.test_rc, kind), os.path.join(
                    self.tempdir, "live", "example.org", kind + ".pem"))

    def test_renewal_bad_config(self):
        """Test that the RenewableCert constructor will complain if
        the renewal configuration file doesn't end in ".conf"

        """
        from certbot import storage
        broken = os.path.join(self.tempdir, "broken.conf")
        with open(broken, "w") as f:
            f.write("[No closing bracket for you!")
        self.assertRaises(errors.CertStorageError, storage.RenewableCert,
                          broken, self.cli_config)
        os.unlink(broken)
        self.assertRaises(errors.CertStorageError, storage.RenewableCert,
                          "fun", self.cli_config)

    def test_renewal_incomplete_config(self):
        """Test that the RenewableCert constructor will complain if
        the renewal configuration file is missing a required file element."""
        from certbot import storage
        config = configobj.ConfigObj()
        config["cert"] = "imaginary_cert.pem"
        # Here the required privkey is missing.
        config["chain"] = "imaginary_chain.pem"
        config["fullchain"] = "imaginary_fullchain.pem"
        config.filename = os.path.join(self.tempdir, "imaginary_config.conf")
        config.write()
        self.assertRaises(errors.CertStorageError, storage.RenewableCert,
                          config.filename, self.cli_config)

    def test_no_renewal_version(self):
        from certbot import storage

        self._write_out_ex_kinds()
        self.assertTrue("version" not in self.config)

        with mock.patch("certbot.storage.logger") as mock_logger:
            storage.RenewableCert(self.config.filename, self.cli_config)
        self.assertFalse(mock_logger.warning.called)

    def test_renewal_newer_version(self):
        from certbot import storage

        self._write_out_ex_kinds()
        self.config["version"] = "99.99.99"
        self.config.write()

        with mock.patch("certbot.storage.logger") as mock_logger:
            storage.RenewableCert(self.config.filename, self.cli_config)
        self.assertTrue(mock_logger.warning.called)
        self.assertTrue("version" in mock_logger.warning.call_args[0][0])

    def test_consistent(self):
        # pylint: disable=too-many-statements,protected-access
        oldcert = self.test_rc.cert
        self.test_rc.cert = "relative/path"
        # Absolute path for item requirement
        self.assertFalse(self.test_rc._consistent())
        self.test_rc.cert = oldcert
        # Items must exist requirement
        self.assertFalse(self.test_rc._consistent())
        # Items must be symlinks requirements
        fill_with_sample_data(self.test_rc)
        self.assertFalse(self.test_rc._consistent())
        unlink_all(self.test_rc)
        # Items must point to desired place if they are relative
        for kind in ALL_FOUR:
            os.symlink(os.path.join("..", kind + "17.pem"),
                       getattr(self.test_rc, kind))
        self.assertFalse(self.test_rc._consistent())
        unlink_all(self.test_rc)
        # Items must point to desired place if they are absolute
        for kind in ALL_FOUR:
            os.symlink(os.path.join(self.tempdir, kind + "17.pem"),
                       getattr(self.test_rc, kind))
        self.assertFalse(self.test_rc._consistent())
        unlink_all(self.test_rc)
        # Items must point to things that exist
        for kind in ALL_FOUR:
            os.symlink(os.path.join("..", "..", "archive", "example.org",
                                    kind + "17.pem"),
                       getattr(self.test_rc, kind))
        self.assertFalse(self.test_rc._consistent())
        # This version should work
        fill_with_sample_data(self.test_rc)
        self.assertTrue(self.test_rc._consistent())
        # Items must point to things that follow the naming convention
        os.unlink(self.test_rc.fullchain)
        os.symlink(os.path.join("..", "..", "archive", "example.org",
                                "fullchain_17.pem"), self.test_rc.fullchain)
        with open(self.test_rc.fullchain, "w") as f:
            f.write("wrongly-named fullchain")
        self.assertFalse(self.test_rc._consistent())

    def test_current_target(self):
        # Relative path logic
        self._write_out_kind("cert", 17)
        self.assertTrue(os.path.samefile(self.test_rc.current_target("cert"),
                                         os.path.join(self.tempdir, "archive",
                                                      "example.org",
                                                      "cert17.pem")))
        # Absolute path logic
        os.unlink(self.test_rc.cert)
        os.symlink(os.path.join(self.tempdir, "archive", "example.org",
                                "cert17.pem"), self.test_rc.cert)
        with open(self.test_rc.cert, "w") as f:
            f.write("cert")
        self.assertTrue(os.path.samefile(self.test_rc.current_target("cert"),
                                         os.path.join(self.tempdir, "archive",
                                                      "example.org",
                                                      "cert17.pem")))

    def test_current_version(self):
        for ver in (1, 5, 10, 20):
            self._write_out_kind("cert", ver)
        os.unlink(self.test_rc.cert)
        os.symlink(os.path.join("..", "..", "archive", "example.org",
                                "cert10.pem"), self.test_rc.cert)
        self.assertEqual(self.test_rc.current_version("cert"), 10)

    def test_no_current_version(self):
        self.assertEqual(self.test_rc.current_version("cert"), None)

    def test_latest_and_next_versions(self):
        for ver in xrange(1, 6):
            for kind in ALL_FOUR:
                self._write_out_kind(kind, ver)
        self.assertEqual(self.test_rc.latest_common_version(), 5)
        self.assertEqual(self.test_rc.next_free_version(), 6)
        # Having one kind of file of a later version doesn't change the
        # result
        self._write_out_kind("privkey", 7)
        self.assertEqual(self.test_rc.latest_common_version(), 5)
        # ... although it does change the next free version
        self.assertEqual(self.test_rc.next_free_version(), 8)
        # Nor does having three out of four change the result
        self._write_out_kind("cert", 7)
        self._write_out_kind("fullchain", 7)
        self.assertEqual(self.test_rc.latest_common_version(), 5)
        # If we have everything from a much later version, it does change
        # the result
        for kind in ALL_FOUR:
            self._write_out_kind(kind, 17)
        self.assertEqual(self.test_rc.latest_common_version(), 17)
        self.assertEqual(self.test_rc.next_free_version(), 18)

    def test_update_link_to(self):
        for ver in xrange(1, 6):
            for kind in ALL_FOUR:
                self._write_out_kind(kind, ver)
                self.assertEqual(ver, self.test_rc.current_version(kind))
        # pylint: disable=protected-access
        self.test_rc._update_link_to("cert", 3)
        self.test_rc._update_link_to("privkey", 2)
        self.assertEqual(3, self.test_rc.current_version("cert"))
        self.assertEqual(2, self.test_rc.current_version("privkey"))
        self.assertEqual(5, self.test_rc.current_version("chain"))
        self.assertEqual(5, self.test_rc.current_version("fullchain"))
        # Currently we are allowed to update to a version that doesn't exist
        self.test_rc._update_link_to("chain", 3000)
        # However, current_version doesn't allow querying the resulting
        # version (because it's a broken link).
        self.assertEqual(os.path.basename(os.readlink(self.test_rc.chain)),
                         "chain3000.pem")

    def test_version(self):
        self._write_out_kind("cert", 12)
        # TODO: We should probably test that the directory is still the
        #       same, but it's tricky because we can get an absolute
        #       path out when we put a relative path in.
        self.assertEqual("cert8.pem",
                         os.path.basename(self.test_rc.version("cert", 8)))

    def test_update_all_links_to_success(self):
        for ver in xrange(1, 6):
            for kind in ALL_FOUR:
                self._write_out_kind(kind, ver)
                self.assertEqual(ver, self.test_rc.current_version(kind))
        self.assertEqual(self.test_rc.latest_common_version(), 5)
        for ver in xrange(1, 6):
            self.test_rc.update_all_links_to(ver)
            for kind in ALL_FOUR:
                self.assertEqual(ver, self.test_rc.current_version(kind))
            self.assertEqual(self.test_rc.latest_common_version(), 5)

    def test_update_all_links_to_partial_failure(self):
        def unlink_or_raise(path, real_unlink=os.unlink):
            # pylint: disable=missing-docstring
            basename = os.path.basename(path)
            if "fullchain" in basename and basename.startswith("prev"):
                raise ValueError
            else:
                real_unlink(path)

        self._write_out_ex_kinds()
        with mock.patch("certbot.storage.os.unlink") as mock_unlink:
            mock_unlink.side_effect = unlink_or_raise
            self.assertRaises(ValueError, self.test_rc.update_all_links_to, 12)

        for kind in ALL_FOUR:
            self.assertEqual(self.test_rc.current_version(kind), 12)

    def test_update_all_links_to_full_failure(self):
        def unlink_or_raise(path, real_unlink=os.unlink):
            # pylint: disable=missing-docstring
            if "fullchain" in os.path.basename(path):
                raise ValueError
            else:
                real_unlink(path)

        self._write_out_ex_kinds()
        with mock.patch("certbot.storage.os.unlink") as mock_unlink:
            mock_unlink.side_effect = unlink_or_raise
            self.assertRaises(ValueError, self.test_rc.update_all_links_to, 12)

        for kind in ALL_FOUR:
            self.assertEqual(self.test_rc.current_version(kind), 11)

    def test_has_pending_deployment(self):
        for ver in xrange(1, 6):
            for kind in ALL_FOUR:
                self._write_out_kind(kind, ver)
                self.assertEqual(ver, self.test_rc.current_version(kind))
        for ver in xrange(1, 6):
            self.test_rc.update_all_links_to(ver)
            for kind in ALL_FOUR:
                self.assertEqual(ver, self.test_rc.current_version(kind))
            if ver < 5:
                self.assertTrue(self.test_rc.has_pending_deployment())
            else:
                self.assertFalse(self.test_rc.has_pending_deployment())

    def test_names(self):
        # Trying the current version
        self._write_out_kind("cert", 12, test_util.load_vector("cert-san.pem"))
        self.assertEqual(self.test_rc.names(),
                         ["example.com", "www.example.com"])

        # Trying a non-current version
        self._write_out_kind("cert", 15, test_util.load_vector("cert.pem"))
        self.assertEqual(self.test_rc.names(12),
                         ["example.com", "www.example.com"])

        # Testing common name is listed first
        self._write_out_kind(
            "cert", 12, test_util.load_vector("cert-5sans.pem"))
        self.assertEqual(
            self.test_rc.names(12),
            ["example.com"] + ["{0}.example.com".format(c) for c in "abcd"])

        # Trying missing cert
        os.unlink(self.test_rc.cert)
        self.assertRaises(errors.CertStorageError, self.test_rc.names)

    @mock.patch("certbot.storage.datetime")
    def test_time_interval_judgments(self, mock_datetime):
        """Test should_autodeploy() and should_autorenew() on the basis
        of expiry time windows."""
        test_cert = test_util.load_vector("cert.pem")
        self._write_out_ex_kinds()

        self.test_rc.update_all_links_to(12)
        with open(self.test_rc.cert, "w") as f:
            f.write(test_cert)
        self.test_rc.update_all_links_to(11)
        with open(self.test_rc.cert, "w") as f:
            f.write(test_cert)

        mock_datetime.timedelta = datetime.timedelta

        for (current_time, interval, result) in [
                # 2014-12-13 12:00:00+00:00 (about 5 days prior to expiry)
                # Times that should result in autorenewal/autodeployment
                (1418472000, "2 months", True), (1418472000, "1 week", True),
                # Times that should not
                (1418472000, "4 days", False), (1418472000, "2 days", False),
                # 2009-05-01 12:00:00+00:00 (about 5 years prior to expiry)
                # Times that should result in autorenewal/autodeployment
                (1241179200, "7 years", True),
                (1241179200, "11 years 2 months", True),
                # Times that should not
                (1241179200, "8 hours", False), (1241179200, "2 days", False),
                (1241179200, "40 days", False), (1241179200, "9 months", False),
                # 2015-01-01 (after expiry has already happened, so all
                #            intervals should cause autorenewal/autodeployment)
                (1420070400, "0 seconds", True),
                (1420070400, "10 seconds", True),
                (1420070400, "10 minutes", True),
                (1420070400, "10 weeks", True), (1420070400, "10 months", True),
                (1420070400, "10 years", True), (1420070400, "99 months", True),
        ]:
            sometime = datetime.datetime.utcfromtimestamp(current_time)
            mock_datetime.datetime.utcnow.return_value = sometime
            self.test_rc.configuration["deploy_before_expiry"] = interval
            self.test_rc.configuration["renew_before_expiry"] = interval
            self.assertEqual(self.test_rc.should_autodeploy(), result)
            self.assertEqual(self.test_rc.should_autorenew(), result)

    def test_autodeployment_is_enabled(self):
        self.assertTrue(self.test_rc.autodeployment_is_enabled())
        self.test_rc.configuration["autodeploy"] = "1"
        self.assertTrue(self.test_rc.autodeployment_is_enabled())

        self.test_rc.configuration["autodeploy"] = "0"
        self.assertFalse(self.test_rc.autodeployment_is_enabled())

    def test_should_autodeploy(self):
        """Test should_autodeploy() on the basis of reasons other than
        expiry time window."""
        # pylint: disable=too-many-statements
        # Autodeployment turned off
        self.test_rc.configuration["autodeploy"] = "0"
        self.assertFalse(self.test_rc.should_autodeploy())
        self.test_rc.configuration["autodeploy"] = "1"
        # No pending deployment
        for ver in xrange(1, 6):
            for kind in ALL_FOUR:
                self._write_out_kind(kind, ver)
        self.assertFalse(self.test_rc.should_autodeploy())

    def test_autorenewal_is_enabled(self):
        self.assertTrue(self.test_rc.autorenewal_is_enabled())
        self.test_rc.configuration["autorenew"] = "1"
        self.assertTrue(self.test_rc.autorenewal_is_enabled())

        self.test_rc.configuration["autorenew"] = "0"
        self.assertFalse(self.test_rc.autorenewal_is_enabled())

    @mock.patch("certbot.storage.RenewableCert.ocsp_revoked")
    def test_should_autorenew(self, mock_ocsp):
        """Test should_autorenew on the basis of reasons other than
        expiry time window."""
        # pylint: disable=too-many-statements
        # Autorenewal turned off
        self.test_rc.configuration["autorenew"] = "0"
        self.assertFalse(self.test_rc.should_autorenew())
        self.test_rc.configuration["autorenew"] = "1"
        for kind in ALL_FOUR:
            self._write_out_kind(kind, 12)
        # Mandatory renewal on the basis of OCSP revocation
        mock_ocsp.return_value = True
        self.assertTrue(self.test_rc.should_autorenew())
        mock_ocsp.return_value = False

    @mock.patch("certbot.storage.relevant_values")
    def test_save_successor(self, mock_rv):
        # Mock relevant_values() to claim that all values are relevant here
        # (to avoid instantiating parser)
        mock_rv.side_effect = lambda x: x

        for ver in xrange(1, 6):
            for kind in ALL_FOUR:
                self._write_out_kind(kind, ver)
        self.test_rc.update_all_links_to(3)
        self.assertEqual(
            6, self.test_rc.save_successor(3, "new cert", None,
                                           "new chain", self.cli_config))
        with open(self.test_rc.version("cert", 6)) as f:
            self.assertEqual(f.read(), "new cert")
        with open(self.test_rc.version("chain", 6)) as f:
            self.assertEqual(f.read(), "new chain")
        with open(self.test_rc.version("fullchain", 6)) as f:
            self.assertEqual(f.read(), "new cert" + "new chain")
        # version 6 of the key should be a link back to version 3
        self.assertFalse(os.path.islink(self.test_rc.version("privkey", 3)))
        self.assertTrue(os.path.islink(self.test_rc.version("privkey", 6)))
        # Let's try two more updates
        self.assertEqual(
            7, self.test_rc.save_successor(6, "again", None,
                                           "newer chain", self.cli_config))
        self.assertEqual(
            8, self.test_rc.save_successor(7, "hello", None,
                                           "other chain", self.cli_config))
        # All of the subsequent versions should link directly to the original
        # privkey.
        for i in (6, 7, 8):
            self.assertTrue(os.path.islink(self.test_rc.version("privkey", i)))
            self.assertEqual("privkey3.pem", os.path.basename(os.readlink(
                self.test_rc.version("privkey", i))))

        for kind in ALL_FOUR:
            self.assertEqual(self.test_rc.available_versions(kind), range(1, 9))
            self.assertEqual(self.test_rc.current_version(kind), 3)
        # Test updating from latest version rather than old version
        self.test_rc.update_all_links_to(8)
        self.assertEqual(
            9, self.test_rc.save_successor(8, "last", None,
                                           "attempt", self.cli_config))
        for kind in ALL_FOUR:
            self.assertEqual(self.test_rc.available_versions(kind),
                             range(1, 10))
            self.assertEqual(self.test_rc.current_version(kind), 8)
        with open(self.test_rc.version("fullchain", 9)) as f:
            self.assertEqual(f.read(), "last" + "attempt")
        temp_config_file = os.path.join(self.cli_config.renewal_configs_dir,
                                        self.test_rc.lineagename) + ".conf.new"
        with open(temp_config_file, "w") as f:
            f.write("We previously crashed while writing me :(")
        # Test updating when providing a new privkey.  The key should
        # be saved in a new file rather than creating a new symlink.
        self.assertEqual(
            10, self.test_rc.save_successor(9, "with", "a",
                                            "key", self.cli_config))
        self.assertTrue(os.path.exists(self.test_rc.version("privkey", 10)))
        self.assertFalse(os.path.islink(self.test_rc.version("privkey", 10)))
        self.assertFalse(os.path.exists(temp_config_file))

    def _test_relevant_values_common(self, values):
        option = "rsa_key_size"
        mock_parser = mock.Mock(args=["--standalone"], verb="certonly",
                                defaults={option: cli.flag_default(option)})

        from certbot.storage import relevant_values
        with mock.patch("certbot.cli.helpful_parser", mock_parser):
            return relevant_values(values)

    def test_relevant_values(self):
        """Test that relevant_values() can reject an irrelevant value."""
        self.assertEqual(
            self._test_relevant_values_common({"hello": "there"}), {})

    def test_relevant_values_default(self):
        """Test that relevant_values() can reject a default value."""
        option = "rsa_key_size"
        values = {option: cli.flag_default(option)}
        self.assertEqual(self._test_relevant_values_common(values), {})

    def test_relevant_values_nondefault(self):
        """Test that relevant_values() can retain a non-default value."""
        values = {"rsa_key_size": 12}
        # A copy is given to _test_relevant_values_common
        # to make sure values isn't modified by the method
        self.assertEqual(
            self._test_relevant_values_common(values.copy()), values)

    @mock.patch("certbot.storage.relevant_values")
    def test_new_lineage(self, mock_rv):
        """Test for new_lineage() class method."""
        # Mock relevant_values to say everything is relevant here (so we
        # don't have to mock the parser to help it decide!)
        mock_rv.side_effect = lambda x: x

        from certbot import storage
        result = storage.RenewableCert.new_lineage(
            "the-lineage.com", "cert", "privkey", "chain", self.cli_config)
        # This consistency check tests most relevant properties about the
        # newly created cert lineage.
        # pylint: disable=protected-access
        self.assertTrue(result._consistent())
        self.assertTrue(os.path.exists(os.path.join(
            self.cli_config.renewal_configs_dir, "the-lineage.com.conf")))
        with open(result.fullchain) as f:
            self.assertEqual(f.read(), "cert" + "chain")
        # Let's do it again and make sure it makes a different lineage
        result = storage.RenewableCert.new_lineage(
            "the-lineage.com", "cert2", "privkey2", "chain2", self.cli_config)
        self.assertTrue(os.path.exists(os.path.join(
            self.cli_config.renewal_configs_dir, "the-lineage.com-0001.conf")))
        # Now trigger the detection of already existing files
        os.mkdir(os.path.join(
            self.cli_config.live_dir, "the-lineage.com-0002"))
        self.assertRaises(errors.CertStorageError,
                          storage.RenewableCert.new_lineage, "the-lineage.com",
                          "cert3", "privkey3", "chain3", self.cli_config)
        os.mkdir(os.path.join(self.cli_config.archive_dir, "other-example.com"))
        self.assertRaises(errors.CertStorageError,
                          storage.RenewableCert.new_lineage,
                          "other-example.com", "cert4",
                          "privkey4", "chain4", self.cli_config)
        # Make sure it can accept renewal parameters
        result = storage.RenewableCert.new_lineage(
            "the-lineage.com", "cert2", "privkey2", "chain2", self.cli_config)
        # TODO: Conceivably we could test that the renewal parameters actually
        #       got saved

    @mock.patch("certbot.storage.relevant_values")
    def test_new_lineage_nonexistent_dirs(self, mock_rv):
        """Test that directories can be created if they don't exist."""
        # Mock relevant_values to say everything is relevant here (so we
        # don't have to mock the parser to help it decide!)
        mock_rv.side_effect = lambda x: x

        from certbot import storage
        shutil.rmtree(self.cli_config.renewal_configs_dir)
        shutil.rmtree(self.cli_config.archive_dir)
        shutil.rmtree(self.cli_config.live_dir)

        storage.RenewableCert.new_lineage(
            "the-lineage.com", "cert2", "privkey2", "chain2", self.cli_config)
        self.assertTrue(os.path.exists(
            os.path.join(
                self.cli_config.renewal_configs_dir, "the-lineage.com.conf")))
        self.assertTrue(os.path.exists(os.path.join(
            self.cli_config.live_dir, "the-lineage.com", "privkey.pem")))
        self.assertTrue(os.path.exists(os.path.join(
            self.cli_config.archive_dir, "the-lineage.com", "privkey1.pem")))

    @mock.patch("certbot.storage.util.unique_lineage_name")
    def test_invalid_config_filename(self, mock_uln):
        from certbot import storage
        mock_uln.return_value = "this_does_not_end_with_dot_conf", "yikes"
        self.assertRaises(errors.CertStorageError,
                          storage.RenewableCert.new_lineage, "example.com",
                          "cert", "privkey", "chain", self.cli_config)

    def test_bad_kind(self):
        self.assertRaises(
            errors.CertStorageError, self.test_rc.current_target, "elephant")
        self.assertRaises(
            errors.CertStorageError, self.test_rc.current_version, "elephant")
        self.assertRaises(
            errors.CertStorageError, self.test_rc.version, "elephant", 17)
        self.assertRaises(
            errors.CertStorageError,
            self.test_rc.available_versions, "elephant")
        self.assertRaises(
            errors.CertStorageError,
            self.test_rc.newest_available_version, "elephant")
        # pylint: disable=protected-access
        self.assertRaises(
            errors.CertStorageError,
            self.test_rc._update_link_to, "elephant", 17)

    def test_ocsp_revoked(self):
        # XXX: This is currently hardcoded to False due to a lack of an
        #      OCSP server to test against.
        self.assertFalse(self.test_rc.ocsp_revoked())

    def test_add_time_interval(self):
        from certbot import storage

        # this month has 30 days, and the next year is a leap year
        time_1 = pytz.UTC.fromutc(datetime.datetime(2003, 11, 20, 11, 59, 21))

        # this month has 31 days, and the next year is not a leap year
        time_2 = pytz.UTC.fromutc(datetime.datetime(2012, 10, 18, 21, 31, 16))

        # in different time zone (GMT+8)
        time_3 = pytz.timezone('Asia/Shanghai').fromutc(
            datetime.datetime(2015, 10, 26, 22, 25, 41))

        intended = {
            (time_1, ""): time_1,
            (time_2, ""): time_2,
            (time_3, ""): time_3,
            (time_1, "17 days"): time_1 + datetime.timedelta(17),
            (time_2, "17 days"): time_2 + datetime.timedelta(17),
            (time_1, "30"): time_1 + datetime.timedelta(30),
            (time_2, "30"): time_2 + datetime.timedelta(30),
            (time_1, "7 weeks"): time_1 + datetime.timedelta(49),
            (time_2, "7 weeks"): time_2 + datetime.timedelta(49),
            # 1 month is always 30 days, no matter which month it is
            (time_1, "1 month"): time_1 + datetime.timedelta(30),
            (time_2, "1 month"): time_2 + datetime.timedelta(31),
            # 1 year could be 365 or 366 days, depends on the year
            (time_1, "1 year"): time_1 + datetime.timedelta(366),
            (time_2, "1 year"): time_2 + datetime.timedelta(365),
            (time_1, "1 year 1 day"): time_1 + datetime.timedelta(367),
            (time_2, "1 year 1 day"): time_2 + datetime.timedelta(366),
            (time_1, "1 year-1 day"): time_1 + datetime.timedelta(365),
            (time_2, "1 year-1 day"): time_2 + datetime.timedelta(364),
            (time_1, "4 years"): time_1 + datetime.timedelta(1461),
            (time_2, "4 years"): time_2 + datetime.timedelta(1461),
        }

        for parameters, excepted in intended.items():
            base_time, interval = parameters
            self.assertEqual(storage.add_time_interval(base_time, interval),
                             excepted)

    def test_missing_cert(self):
        from certbot import storage
        self.assertRaises(errors.CertStorageError,
                          storage.RenewableCert,
                          self.config.filename, self.cli_config)
        os.symlink("missing", self.config[ALL_FOUR[0]])
        self.assertRaises(errors.CertStorageError,
                          storage.RenewableCert,
                          self.config.filename, self.cli_config)

    def test_write_renewal_config(self):
        # Mostly tested by the process of creating and updating lineages,
        # but we can test that this successfully creates files, removes
        # unneeded items, and preserves comments.
        temp = os.path.join(self.tempdir, "sample-file")
        temp2 = os.path.join(self.tempdir, "sample-file.new")
        with open(temp, "w") as f:
            f.write("[renewalparams]\nuseful = value # A useful value\n"
                    "useless = value # Not needed\n")
        target = {}
        for x in ALL_FOUR:
            target[x] = "somewhere"
        relevant_data = {"useful": "new_value"}
        from certbot import storage
        storage.write_renewal_config(temp, temp2, target, relevant_data)
        with open(temp2, "r") as f:
            content = f.read()
        # useful value was updated
        self.assertTrue("useful = new_value" in content)
        # associated comment was preserved
        self.assertTrue("A useful value" in content)
        # useless value was deleted
        self.assertTrue("useless" not in content)
        # check version was stored
        self.assertTrue("version = {0}".format(certbot.__version__) in content)


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