~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006 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 WorkingTree.flush."""

import sys

from bzrlib import errors

from bzrlib.tests import TestSkipped

from bzrlib.tests.per_workingtree import TestCaseWithWorkingTree

class TestFlush(TestCaseWithWorkingTree):

    def test_flush_fresh_tree(self):

        tree = self.make_branch_and_tree('t1')

        tree.lock_write()

        try:

            tree.flush()

        finally:

            tree.unlock()

    def test_flush_when_inventory_is_modified(self):

        if sys.platform == "win32":

            raise TestSkipped("don't use oslocks on win32 in unix manner")

        # This takes a write lock on the source tree, then opens a second copy

        # and tries to grab a read lock. This works on Unix and is a reasonable

        # way to detect when the file is actually written to, but it won't work

        # (as a test) on Windows. It might be nice to instead stub out the

        # functions used to write and that way do both less work and also be

        # able to execute on Windows.

        self.thisFailsStrictLockCheck()

        # when doing a flush the inventory should be written if needed.

        # we test that by changing the inventory (using

        # _set_inventory for now until add etc have lazy writes of

        # the inventory on unlock).

        tree = self.make_branch_and_tree('tree')

        # prepare for a series of changes that will modify the

        # inventory

        tree.lock_write()

        try:

            old_root = tree.get_root_id()

            tree.set_root_id('new-root')

            # to detect that the inventory is written by flush, we

            # first check that it was not written yet.

            reference_tree = tree.bzrdir.open_workingtree()

            self.assertEqual(old_root, reference_tree.get_root_id())

            # now flush the tree which should write the inventory.

            tree.flush()

            # and check it was written using another reference tree

            reference_tree = tree.bzrdir.open_workingtree()

            self.assertEqual('new-root', reference_tree.get_root_id())

        finally:

            tree.unlock()

    def test_flush_with_read_lock_fails(self):

        """Flush cannot be used during a read lock."""

        tree = self.make_branch_and_tree('t1')

        tree.lock_read()

        try:

            self.assertRaises(errors.NotWriteLocked, tree.flush)

        finally:

            tree.unlock()

    def test_flush_with_no_lock_fails(self):

        tree = self.make_branch_and_tree('t1')

        self.assertRaises(errors.NotWriteLocked, tree.flush)