~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2009 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

"""Tests for smart server request infrastructure (bzrlib.smart.request)."""

from bzrlib import errors

from bzrlib.smart import request

from bzrlib.tests import TestCase

class NoBodyRequest(request.SmartServerRequest):

    """A request that does not implement do_body."""

    def do(self):

        return request.SuccessfulSmartServerResponse(('ok',))

class DoErrorRequest(request.SmartServerRequest):

    """A request that raises an error from self.do()."""

    def do(self):

        raise errors.NoSuchFile('xyzzy')

class ChunkErrorRequest(request.SmartServerRequest):

    """A request that raises an error from self.do_chunk()."""

    def do(self):

        """No-op."""

        pass

    def do_chunk(self, bytes):

        raise errors.NoSuchFile('xyzzy')

class EndErrorRequest(request.SmartServerRequest):

    """A request that raises an error from self.do_end()."""

    def do(self):

        """No-op."""

        pass

    def do_chunk(self, bytes):

        """No-op."""

        pass

    def do_end(self):

        raise errors.NoSuchFile('xyzzy')

class TestSmartRequest(TestCase):

    def test_request_class_without_do_body(self):

        """If a request has no body data, and the request's implementation does

        not override do_body, then no exception is raised.

        """

        # Create a SmartServerRequestHandler with a SmartServerRequest subclass

        # that does not implement do_body.

        handler = request.SmartServerRequestHandler(

            None, {'foo': NoBodyRequest}, '/')

        # Emulate a request with no body (i.e. just args).

        handler.args_received(('foo',))

        handler.end_received()

        # Request done, no exception was raised.

class TestSmartRequestHandlerErrorTranslation(TestCase):

    """Tests that SmartServerRequestHandler will translate exceptions raised by

    a SmartServerRequest into FailedSmartServerResponses.

    """

    def assertNoResponse(self, handler):

        self.assertEqual(None, handler.response)

    def assertResponseIsTranslatedError(self, handler):

        expected_translation = ('NoSuchFile', 'xyzzy')

        self.assertEqual(

            request.FailedSmartServerResponse(expected_translation),

            handler.response)

    def test_error_translation_from_args_received(self):

        handler = request.SmartServerRequestHandler(

            None, {'foo': DoErrorRequest}, '/')

        handler.args_received(('foo',))

        self.assertResponseIsTranslatedError(handler)

    def test_error_translation_from_chunk_received(self):

        handler = request.SmartServerRequestHandler(

            None, {'foo': ChunkErrorRequest}, '/')

        handler.args_received(('foo',))

        self.assertNoResponse(handler)

        handler.accept_body('bytes')

        self.assertResponseIsTranslatedError(handler)

    def test_error_translation_from_end_received(self):

        handler = request.SmartServerRequestHandler(

            None, {'foo': EndErrorRequest}, '/')

        handler.args_received(('foo',))

        self.assertNoResponse(handler)

        handler.end_received()

        self.assertResponseIsTranslatedError(handler)

class TestRequestHanderErrorTranslation(TestCase):

    """Tests for bzrlib.smart.request._translate_error."""

    def assertTranslationEqual(self, expected_tuple, error):

        self.assertEqual(expected_tuple, request._translate_error(error))

    def test_NoSuchFile(self):

        self.assertTranslationEqual(

            ('NoSuchFile', 'path'), errors.NoSuchFile('path'))

    def test_LockContention(self):

        self.assertTranslationEqual(

            ('LockContention', 'lock', 'msg'),

            errors.LockContention('lock', 'msg'))

    def test_TokenMismatch(self):

        self.assertTranslationEqual(

            ('TokenMismatch', 'some-token', 'actual-token'),

            errors.TokenMismatch('some-token', 'actual-token'))