~abentley/bzrtools/bzrtools.dev

# Copyright (C) 2008 Aaron Bentley

#

#    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

import os

from bzrlib.transform import TreeTransform

from bzrlib.tests import TestCaseWithTransport, HardlinkFeature

from bzrlib.plugins.bzrtools import command

from bzrlib.plugins.bzrtools.link_tree import link_tree

class TestLinkTreeBase(object):

    _test_needs_features = [HardlinkFeature]

    def setUp(self):

        TestCaseWithTransport.setUp(self)

        self.parent_tree = self.make_branch_and_tree('parent')

        self.parent_tree.lock_write()

        self.addCleanup(self.parent_tree.unlock)

        self.build_tree_contents([('parent/foo', 'bar')])

        self.parent_tree.add('foo', 'foo-id')

        self.parent_tree.commit('added foo')

        child_bzrdir = self.parent_tree.bzrdir.sprout('child')

        self.child_tree = child_bzrdir.open_workingtree()

    def hardlinked(self):

        parent_stat = os.lstat(self.parent_tree.abspath('foo'))

        child_stat = os.lstat(self.child_tree.abspath('foo'))

        return parent_stat.st_ino == child_stat.st_ino

class TestLinkTree(TestLinkTreeBase, TestCaseWithTransport):

    def test_link_fails_if_modified(self):

        """If the file to be linked has modified text, don't link."""

        self.build_tree_contents([('child/foo', 'baz')])

        link_tree(self.child_tree, self.parent_tree)

        self.assertFalse(self.hardlinked())

    def test_link_fails_if_execute_bit_changed(self):

        """If the file to be linked has modified execute bit, don't link."""

        tt = TreeTransform(self.child_tree)

        try:

            trans_id = tt.trans_id_tree_file_id('foo-id')

            tt.set_executability(True, trans_id)

            tt.apply()

        finally:

            tt.finalize()

        link_tree(self.child_tree, self.parent_tree)

        self.assertFalse(self.hardlinked())

    def test_link_succeeds_if_unmodified(self):

        """If the file to be linked is unmodified, link"""

        link_tree(self.child_tree, self.parent_tree)

        self.assertTrue(self.hardlinked())

class TestLinkTreeCommand(TestLinkTreeBase, TestCaseWithTransport):

    def test_link_tree(self):

        """Ensure the command works as intended"""

        command._testing = True

        try:

            os.chdir('child')

            self.parent_tree.unlock()

            self.run_bzr('link-tree ../parent')

            self.assertTrue(self.hardlinked())

            # want teh addCleanup to work properly

            self.parent_tree.lock_write()

        finally:

            command._testing = False