~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2006 Canonical Ltd

# Authors:  Robert Collins <robert.collins@canonical.com>

#

# 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 the MemoryTree class."""

from bzrlib import errors

from bzrlib.memorytree import MemoryTree

from bzrlib.tests import TestCaseWithTransport

from bzrlib.treebuilder import TreeBuilder

class TestMemoryTree(TestCaseWithTransport):

    def test_create_on_branch(self):

        """Creating a mutable tree on a trivial branch works."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        self.assertEqual(branch.bzrdir, tree.bzrdir)

        self.assertEqual(branch, tree.branch)

        self.assertEqual([], tree.get_parent_ids())

    def test_create_on_branch_with_content(self):

        """Creating a mutable tree on a non-trivial branch works."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        # build some content

        tree.lock_write()

        builder = TreeBuilder()

        builder.start_tree(tree)

        builder.build(['foo'])

        builder.finish_tree()

        rev_id = tree.commit('first post')

        tree.unlock()

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_read()

        self.assertEqual([rev_id], tree.get_parent_ids())

        self.assertEqual('contents of foo\n',

            tree.get_file(tree.path2id('foo')).read())

        tree.unlock()

    def test_get_root_id(self):

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        try:

            tree.add([''])

            self.assertIsNot(None, tree.get_root_id())

        finally:

            tree.unlock()

    def test_lock_tree_write(self):

        """Check we can lock_tree_write and unlock MemoryTrees."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_tree_write()

        tree.unlock()

    def test_lock_tree_write_after_read_fails(self):

        """Check that we error when trying to upgrade a read lock to write."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_read()

        self.assertRaises(errors.ReadOnlyError, tree.lock_tree_write)

        tree.unlock()

    def test_lock_write(self):

        """Check we can lock_write and unlock MemoryTrees."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        tree.unlock()

    def test_lock_write_after_read_fails(self):

        """Check that we error when trying to upgrade a read lock to write."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_read()

        self.assertRaises(errors.ReadOnlyError, tree.lock_write)

        tree.unlock()

    def test_add_with_kind(self):

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        tree.add(['', 'afile', 'adir'], None, 

                 ['directory', 'file', 'directory'])

        self.assertEqual('afile', tree.id2path(tree.path2id('afile')))

        self.assertEqual('adir', tree.id2path(tree.path2id('adir')))

        self.assertFalse(tree.has_filename('afile'))

        self.assertFalse(tree.has_filename('adir'))

        tree.unlock()

    def test_put_new_file(self):

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 

                  kinds=['directory', 'file'])

        tree.put_file_bytes_non_atomic('foo-id', 'barshoom')

        self.assertEqual('barshoom', tree.get_file('foo-id').read())

        tree.unlock()

    def test_put_existing_file(self):

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 

                 kinds=['directory', 'file'])

        tree.put_file_bytes_non_atomic('foo-id', 'first-content')

        tree.put_file_bytes_non_atomic('foo-id', 'barshoom')

        self.assertEqual('barshoom', tree.get_file('foo-id').read())

        tree.unlock()

    def test_commit_trivial(self):

        """Smoke test for commit on a MemoryTree.

        Becamse of commits design and layering, if this works, all commit

        logic should work quite reliably.

        """

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 

                 kinds=['directory', 'file'])

        tree.put_file_bytes_non_atomic('foo-id', 'barshoom')

        revision_id = tree.commit('message baby')

        # the parents list for the tree should have changed.

        self.assertEqual([revision_id], tree.get_parent_ids())

        tree.unlock()

        # and we should have a revision that is accessible outside the tree lock

        revtree = tree.branch.repository.revision_tree(revision_id)

        revtree.lock_read()

        self.addCleanup(revtree.unlock)

        self.assertEqual('barshoom', revtree.get_file('foo-id').read())

    def test_unversion(self):

        """Some test for unversion of a memory tree."""

        branch = self.make_branch('branch')

        tree = MemoryTree.create_on_branch(branch)

        tree.lock_write()

        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 

                 kinds=['directory', 'file'])

        tree.unversion(['foo-id'])

        self.assertFalse(tree.has_id('foo-id'))

        tree.unlock()

    def test_last_revision(self):

        """There should be a last revision method we can call."""

        tree = self.make_branch_and_memory_tree('branch')

        tree.lock_write()

        tree.add('')

        rev_id = tree.commit('first post')

        tree.unlock()

        self.assertEqual(rev_id, tree.last_revision())