/brz/remove-bazaar

# Copyright (C) 2006-2012, 2016 Canonical Ltd

#

# This program is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 2 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

"""Tests for the formatting and construction of errors."""

import inspect

import re

import socket

import sys

from .. import (

    controldir,

    errors,

    osutils,

    tests,

    urlutils,

    )

from ..sixish import (

    PY3,

    text_type,

    )

class TestErrors(tests.TestCase):

    def test_no_arg_named_message(self):

        """Ensure the __init__ and _fmt in errors do not have "message" arg.

        This test fails if __init__ or _fmt in errors has an argument

        named "message" as this can cause errors in some Python versions.

        Python 2.5 uses a slot for StandardError.message.

        See bug #603461

        """

        fmt_pattern = re.compile("%\\(message\\)[sir]")

        for c in errors.BzrError.__subclasses__():

            init = getattr(c, '__init__', None)

            fmt = getattr(c, '_fmt', None)

            if init:

                if PY3:

                    args = inspect.getfullargspec(init)[0]

                else:

                    args = inspect.getargspec(init)[0]

                self.assertFalse('message' in args,

                                 ('Argument name "message" not allowed for '

                                  '"errors.%s.__init__"' % c.__name__))

            if fmt and fmt_pattern.search(fmt):

                self.assertFalse(True, ('"message" not allowed in '

                                        '"errors.%s._fmt"' % c.__name__))

    def test_bad_filename_encoding(self):

        error = errors.BadFilenameEncoding(b'bad/filen\xe5me', 'UTF-8')

        self.assertContainsRe(

            str(error),

            "^Filename b?'bad/filen\\\\xe5me' is not valid in your current"

            " filesystem encoding UTF-8$")

    def test_duplicate_help_prefix(self):

        error = errors.DuplicateHelpPrefix('foo')

        self.assertEqualDiff('The prefix foo is in the help search path twice.',

                             str(error))

    def test_ghost_revisions_have_no_revno(self):

        error = errors.GhostRevisionsHaveNoRevno('target', 'ghost_rev')

        self.assertEqualDiff("Could not determine revno for {target} because"

                             " its ancestry shows a ghost at {ghost_rev}",

                             str(error))

    def test_incompatibleVersion(self):

        error = errors.IncompatibleVersion("module", [(4, 5, 6), (7, 8, 9)],

                                           (1, 2, 3))

        self.assertEqualDiff(

            'API module is not compatible; one of versions '

            '[(4, 5, 6), (7, 8, 9)] is required, but current version is '

            '(1, 2, 3).',

            str(error))

    def test_inconsistent_delta(self):

        error = errors.InconsistentDelta('path', 'file-id', 'reason for foo')

        self.assertEqualDiff(

            "An inconsistent delta was supplied involving 'path', 'file-id'\n"

            "reason: reason for foo",

            str(error))

    def test_inconsistent_delta_delta(self):

        error = errors.InconsistentDeltaDelta([], 'reason')

        self.assertEqualDiff(

            "An inconsistent delta was supplied: []\nreason: reason",

            str(error))

    def test_in_process_transport(self):

        error = errors.InProcessTransport('fpp')

        self.assertEqualDiff(

            "The transport 'fpp' is only accessible within this process.",

            str(error))

    def test_invalid_http_range(self):

        error = errors.InvalidHttpRange('path',

                                        'Content-Range: potatoes 0-00/o0oo0',

                                        'bad range')

        self.assertEqual("Invalid http range"

                         " 'Content-Range: potatoes 0-00/o0oo0'"

                         " for path: bad range",

                         str(error))

    def test_invalid_range(self):

        error = errors.InvalidRange('path', 12, 'bad range')

        self.assertEqual("Invalid range access in path at 12: bad range",

                         str(error))

    def test_jail_break(self):

        error = errors.JailBreak("some url")

        self.assertEqualDiff("An attempt to access a url outside the server"

                             " jail was made: 'some url'.",

                             str(error))

    def test_lock_active(self):

        error = errors.LockActive("lock description")

        self.assertEqualDiff("The lock for 'lock description' is in use and "

                             "cannot be broken.",

                             str(error))

    def test_lock_corrupt(self):

        error = errors.LockCorrupt("corruption info")

        self.assertEqualDiff("Lock is apparently held, but corrupted: "

                             "corruption info\n"

                             "Use 'brz break-lock' to clear it",

                             str(error))

    def test_medium_not_connected(self):

        error = errors.MediumNotConnected("a medium")

        self.assertEqualDiff(

            "The medium 'a medium' is not connected.", str(error))

    def test_no_smart_medium(self):

        error = errors.NoSmartMedium("a transport")

        self.assertEqualDiff("The transport 'a transport' cannot tunnel the "

                             "smart protocol.",

                             str(error))

    def test_no_such_id(self):

        error = errors.NoSuchId("atree", "anid")

        self.assertEqualDiff("The file id \"anid\" is not present in the tree "

                             "atree.",

                             str(error))

    def test_no_such_revision_in_tree(self):

        error = errors.NoSuchRevisionInTree("atree", "anid")

        self.assertEqualDiff("The revision id {anid} is not present in the"

                             " tree atree.", str(error))

        self.assertIsInstance(error, errors.NoSuchRevision)

    def test_not_stacked(self):

        error = errors.NotStacked('a branch')

        self.assertEqualDiff("The branch 'a branch' is not stacked.",

                             str(error))

    def test_not_write_locked(self):

        error = errors.NotWriteLocked('a thing to repr')

        self.assertEqualDiff("'a thing to repr' is not write locked but needs "

                             "to be.",

                             str(error))

    def test_lock_failed(self):

        error = errors.LockFailed(

            'http://canonical.com/', 'readonly transport')

        self.assertEqualDiff("Cannot lock http://canonical.com/: readonly transport",

                             str(error))

        self.assertFalse(error.internal_error)

    def test_too_many_concurrent_requests(self):

        error = errors.TooManyConcurrentRequests("a medium")

        self.assertEqualDiff("The medium 'a medium' has reached its concurrent "

                             "request limit. Be sure to finish_writing and finish_reading on "

                             "the currently open request.",

                             str(error))

    def test_unstackable_location(self):

        error = errors.UnstackableLocationError('foo', 'bar')

        self.assertEqualDiff("The branch 'foo' cannot be stacked on 'bar'.",

                             str(error))

    def test_unstackable_repository_format(self):

        format = u'foo'

        url = "/foo"

        error = errors.UnstackableRepositoryFormat(format, url)

        self.assertEqualDiff(

            "The repository '/foo'(foo) is not a stackable format. "

            "You will need to upgrade the repository to permit branch stacking.",

            str(error))

    def test_up_to_date(self):

        error = errors.UpToDateFormat("someformat")

        self.assertEqualDiff(

            "The branch format someformat is already at the most "

            "recent format.", str(error))

    def test_read_error(self):

        # a unicode path to check that %r is being used.

        path = u'a path'

        error = errors.ReadError(path)

        self.assertContainsRe(str(error), "^Error reading from u?'a path'.$")

    def test_bzrerror_from_literal_string(self):

        # Some code constructs BzrError from a literal string, in which case

        # no further formatting is done.  (I'm not sure raising the base class

        # is a great idea, but if the exception is not intended to be caught

        # perhaps no more is needed.)

        try:

            raise errors.BzrError('this is my errors; %d is not expanded')

        except errors.BzrError as e:

            self.assertEqual('this is my errors; %d is not expanded', str(e))

    def test_reading_completed(self):

        error = errors.ReadingCompleted("a request")

        self.assertEqualDiff("The MediumRequest 'a request' has already had "

                             "finish_reading called upon it - the request has been completed and"

                             " no more data may be read.",

                             str(error))

    def test_writing_completed(self):

        error = errors.WritingCompleted("a request")

        self.assertEqualDiff("The MediumRequest 'a request' has already had "

                             "finish_writing called upon it - accept bytes may not be called "

                             "anymore.",

                             str(error))

    def test_writing_not_completed(self):

        error = errors.WritingNotComplete("a request")

        self.assertEqualDiff("The MediumRequest 'a request' has not has "

                             "finish_writing called upon it - until the write phase is complete"

                             " no data may be read.",

                             str(error))

    def test_transport_not_possible(self):

        error = errors.TransportNotPossible('readonly', 'original error')

        self.assertEqualDiff('Transport operation not possible:'

                             ' readonly original error', str(error))

    def assertSocketConnectionError(self, expected, *args, **kwargs):

        """Check the formatting of a SocketConnectionError exception"""

        e = errors.SocketConnectionError(*args, **kwargs)

        self.assertEqual(expected, str(e))

    def test_socket_connection_error(self):

        """Test the formatting of SocketConnectionError"""

        # There should be a default msg about failing to connect

        # we only require a host name.

        self.assertSocketConnectionError(

            'Failed to connect to ahost',

            'ahost')

        # If port is None, we don't put :None

        self.assertSocketConnectionError(

            'Failed to connect to ahost',

            'ahost', port=None)

        # But if port is supplied we include it

        self.assertSocketConnectionError(

            'Failed to connect to ahost:22',

            'ahost', port=22)

        # We can also supply extra information about the error

        # with or without a port

        self.assertSocketConnectionError(

            'Failed to connect to ahost:22; bogus error',

            'ahost', port=22, orig_error='bogus error')

        self.assertSocketConnectionError(

            'Failed to connect to ahost; bogus error',

            'ahost', orig_error='bogus error')

        # An exception object can be passed rather than a string

        orig_error = ValueError('bad value')

        self.assertSocketConnectionError(

            'Failed to connect to ahost; %s' % (str(orig_error),),

            host='ahost', orig_error=orig_error)

        # And we can supply a custom failure message

        self.assertSocketConnectionError(

            'Unable to connect to ssh host ahost:444; my_error',

            host='ahost', port=444, msg='Unable to connect to ssh host',

            orig_error='my_error')

    def test_target_not_branch(self):

        """Test the formatting of TargetNotBranch."""

        error = errors.TargetNotBranch('foo')

        self.assertEqual(

            "Your branch does not have all of the revisions required in "

            "order to merge this merge directive and the target "

            "location specified in the merge directive is not a branch: "

            "foo.", str(error))

    def test_unexpected_smart_server_response(self):

        e = errors.UnexpectedSmartServerResponse(('not yes',))

        self.assertEqual(

            "Could not understand response from smart server: ('not yes',)",

            str(e))

    def test_unknown_container_format(self):

        """Test the formatting of UnknownContainerFormatError."""

        e = errors.UnknownContainerFormatError('bad format string')

        self.assertEqual(

            "Unrecognised container format: 'bad format string'",

            str(e))

    def test_unexpected_end_of_container(self):

        """Test the formatting of UnexpectedEndOfContainerError."""

        e = errors.UnexpectedEndOfContainerError()

        self.assertEqual(

            "Unexpected end of container stream", str(e))

    def test_unknown_record_type(self):

        """Test the formatting of UnknownRecordTypeError."""

        e = errors.UnknownRecordTypeError("X")

        self.assertEqual(

            "Unknown record type: 'X'",

            str(e))

    def test_invalid_record(self):

        """Test the formatting of InvalidRecordError."""

        e = errors.InvalidRecordError("xxx")

        self.assertEqual(

            "Invalid record: xxx",

            str(e))

    def test_container_has_excess_data(self):

        """Test the formatting of ContainerHasExcessDataError."""

        e = errors.ContainerHasExcessDataError("excess bytes")

        self.assertEqual(

            "Container has data after end marker: 'excess bytes'",

            str(e))

    def test_duplicate_record_name_error(self):

        """Test the formatting of DuplicateRecordNameError."""

        e = errors.DuplicateRecordNameError(b"n\xc3\xa5me")

        self.assertEqual(

            u"Container has multiple records with the same name: n\xe5me",

            text_type(e))

    def test_check_error(self):

        e = errors.BzrCheckError('example check failure')

        self.assertEqual(

            "Internal check failed: example check failure",

            str(e))

        self.assertTrue(e.internal_error)

    def test_repository_data_stream_error(self):

        """Test the formatting of RepositoryDataStreamError."""

        e = errors.RepositoryDataStreamError(u"my reason")

        self.assertEqual(

            "Corrupt or incompatible data stream: my reason", str(e))

    def test_immortal_pending_deletion_message(self):

        err = errors.ImmortalPendingDeletion('foo')

        self.assertEqual(

            "Unable to delete transform temporary directory foo.  "

            "Please examine foo to see if it contains any files "

            "you wish to keep, and delete it when you are done.",

            str(err))

    def test_invalid_url_join(self):

        """Test the formatting of InvalidURLJoin."""

        e = urlutils.InvalidURLJoin('Reason', 'base path', ('args',))

        self.assertEqual(

            "Invalid URL join request: Reason: 'base path' + ('args',)",

            str(e))

    def test_unable_encode_path(self):

        err = errors.UnableEncodePath('foo', 'executable')

        self.assertEqual("Unable to encode executable path 'foo' in "

                         "user encoding " + osutils.get_user_encoding(),

                         str(err))

    def test_unknown_format(self):

        err = errors.UnknownFormatError('bar', kind='foo')

        self.assertEqual("Unknown foo format: 'bar'", str(err))

    def test_tip_change_rejected(self):

        err = errors.TipChangeRejected(u'Unicode message\N{INTERROBANG}')

        self.assertEqual(

            u'Tip change rejected: Unicode message\N{INTERROBANG}',

            text_type(err))

    def test_error_from_smart_server(self):

        error_tuple = ('error', 'tuple')

        err = errors.ErrorFromSmartServer(error_tuple)

        self.assertEqual(

            "Error received from smart server: ('error', 'tuple')", str(err))

    def test_untranslateable_error_from_smart_server(self):

        error_tuple = ('error', 'tuple')

        orig_err = errors.ErrorFromSmartServer(error_tuple)

        err = errors.UnknownErrorFromSmartServer(orig_err)

        self.assertEqual(

            "Server sent an unexpected error: ('error', 'tuple')", str(err))

    def test_smart_message_handler_error(self):

        # Make an exc_info tuple.

        try:

            raise Exception("example error")

        except Exception:

            err = errors.SmartMessageHandlerError(sys.exc_info())

        # GZ 2010-11-08: Should not store exc_info in exception instances.

        try:

            self.assertStartsWith(

                str(err), "The message handler raised an exception:\n")

            self.assertEndsWith(str(err), "Exception: example error\n")

        finally:

            del err

    def test_unresumable_write_group(self):

        repo = "dummy repo"

        wg_tokens = ['token']

        reason = "a reason"

        err = errors.UnresumableWriteGroup(repo, wg_tokens, reason)

        self.assertEqual(

            "Repository dummy repo cannot resume write group "

            "['token']: a reason", str(err))

    def test_unsuspendable_write_group(self):

        repo = "dummy repo"

        err = errors.UnsuspendableWriteGroup(repo)

        self.assertEqual(

            'Repository dummy repo cannot suspend a write group.', str(err))

    def test_not_branch_no_args(self):

        err = errors.NotBranchError('path')

        self.assertEqual('Not a branch: "path".', str(err))

    def test_not_branch_bzrdir_with_recursive_not_branch_error(self):

        class FakeBzrDir(object):

            def open_repository(self):

                # str() on the NotBranchError will trigger a call to this,

                # which in turn will another, identical NotBranchError.

                raise errors.NotBranchError('path', controldir=FakeBzrDir())

        err = errors.NotBranchError('path', controldir=FakeBzrDir())

        self.assertEqual('Not a branch: "path": NotBranchError.', str(err))

    def test_recursive_bind(self):

        error = errors.RecursiveBind('foo_bar_branch')

        msg = ('Branch "foo_bar_branch" appears to be bound to itself. '

               'Please use `brz unbind` to fix.')

        self.assertEqualDiff(msg, str(error))

    def test_retry_with_new_packs(self):

        fake_exc_info = ('{exc type}', '{exc value}', '{exc traceback}')

        error = errors.RetryWithNewPacks(

            '{context}', reload_occurred=False, exc_info=fake_exc_info)

        self.assertEqual(

            'Pack files have changed, reload and retry. context: '

            '{context} {exc value}', str(error))

class PassThroughError(errors.BzrError):

    _fmt = """Pass through %(foo)s and %(bar)s"""

    def __init__(self, foo, bar):

        errors.BzrError.__init__(self, foo=foo, bar=bar)

class ErrorWithBadFormat(errors.BzrError):

    _fmt = """One format specifier: %(thing)s"""

class ErrorWithNoFormat(errors.BzrError):

    __doc__ = """This class has a docstring but no format string."""

class TestErrorFormatting(tests.TestCase):

    def test_always_str(self):

        e = PassThroughError(u'\xb5', 'bar')

        self.assertIsInstance(e.__str__(), str)

        # In Python 2 str(foo) *must* return a real byte string

        # not a Unicode string. The following line would raise a

        # Unicode error, because it tries to call str() on the string

        # returned from e.__str__(), and it has non ascii characters

        s = str(e)

        if PY3:

            self.assertEqual('Pass through \xb5 and bar', s)

        else:

            self.assertEqual('Pass through \xc2\xb5 and bar', s)

    def test_missing_format_string(self):

        e = ErrorWithNoFormat(param='randomvalue')

        self.assertStartsWith(str(e),

                              "Unprintable exception ErrorWithNoFormat")

    def test_mismatched_format_args(self):

        # Even though ErrorWithBadFormat's format string does not match the

        # arguments we constructing it with, we can still stringify an instance

        # of this exception. The resulting string will say its unprintable.

        e = ErrorWithBadFormat(not_thing='x')

        self.assertStartsWith(

            str(e), 'Unprintable exception ErrorWithBadFormat')

    def test_cannot_bind_address(self):

        # see <https://bugs.launchpad.net/bzr/+bug/286871>

        e = errors.CannotBindAddress('example.com', 22,

                                     socket.error(13, 'Permission denied'))

        self.assertContainsRe(

            str(e),

            r'Cannot bind address "example\.com:22":.*Permission denied')

class TestErrorsUsingTransport(tests.TestCaseWithMemoryTransport):

    """Tests for errors that need to use a branch or repo."""

    def test_no_public_branch(self):

        b = self.make_branch('.')

        error = errors.NoPublicBranch(b)

        url = urlutils.unescape_for_display(b.base, 'ascii')

        self.assertEqualDiff(

            'There is no public branch set for "%s".' % url, str(error))

    def test_no_repo(self):

        dir = controldir.ControlDir.create(self.get_url())

        error = errors.NoRepositoryPresent(dir)

        self.assertNotEqual(-1,

                            str(error).find((dir.transport.clone('..').base)))

        self.assertEqual(-1, str(error).find((dir.transport.base)))

    def test_corrupt_repository(self):

        repo = self.make_repository('.')

        error = errors.CorruptRepository(repo)

        self.assertEqualDiff("An error has been detected in the repository %s.\n"

                             "Please run brz reconcile on this repository." %

                             repo.controldir.root_transport.base,

                             str(error))

    def test_not_branch_bzrdir_with_repo(self):

        controldir = self.make_repository('repo').controldir

        err = errors.NotBranchError('path', controldir=controldir)

        self.assertEqual(

            'Not a branch: "path": location is a repository.', str(err))

    def test_not_branch_bzrdir_without_repo(self):

        controldir = self.make_controldir('bzrdir')

        err = errors.NotBranchError('path', controldir=controldir)

        self.assertEqual('Not a branch: "path".', str(err))

    def test_not_branch_laziness(self):

        real_bzrdir = self.make_controldir('path')

        class FakeBzrDir(object):

            def __init__(self):

                self.calls = []

            def open_repository(self):

                self.calls.append('open_repository')

                raise errors.NoRepositoryPresent(real_bzrdir)

        fake_bzrdir = FakeBzrDir()

        err = errors.NotBranchError('path', controldir=fake_bzrdir)

        self.assertEqual([], fake_bzrdir.calls)

        str(err)

        self.assertEqual(['open_repository'], fake_bzrdir.calls)

        # Stringifying twice doesn't try to open a repository twice.

        str(err)

        self.assertEqual(['open_repository'], fake_bzrdir.calls)