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  • Committer: Martin Pool
  • Date: 2005-09-07 04:00:21 UTC
  • Revision ID: mbp@sourcefrog.net-20050907040020-2c7a5e0176888d95
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bzrlib/tests/test_memorytree.py
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# Copyright (C) 2006 Canonical Ltd
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# Authors:  Robert Collins <robert.collins@canonical.com>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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"""Tests for the MemoryTree class."""
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from bzrlib import errors
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from bzrlib.memorytree import MemoryTree
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from bzrlib.tests import TestCaseWithTransport
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from bzrlib.treebuilder import TreeBuilder
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class TestMemoryTree(TestCaseWithTransport):
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    def test_create_on_branch(self):
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        """Creating a mutable tree on a trivial branch works."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        self.assertEqual(branch.bzrdir, tree.bzrdir)
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        self.assertEqual(branch, tree.branch)
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        self.assertEqual([], tree.get_parent_ids())
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    def test_create_on_branch_with_content(self):
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        """Creating a mutable tree on a non-trivial branch works."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        # build some content
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        tree.lock_write()
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        builder = TreeBuilder()
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        builder.start_tree(tree)
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        builder.build(['foo'])
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        builder.finish_tree()
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        rev_id = tree.commit('first post')
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        tree.unlock()
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_read()
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        self.assertEqual([rev_id], tree.get_parent_ids())
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        self.assertEqual('contents of foo\n',
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            tree.get_file(tree.path2id('foo')).read())
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        tree.unlock()
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    def test_lock_tree_write(self):
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        """Check we can lock_tree_write and unlock MemoryTrees."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_tree_write()
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        tree.unlock()
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    def test_lock_tree_write_after_read_fails(self):
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        """Check that we error when trying to upgrade a read lock to write."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_read()
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        self.assertRaises(errors.ReadOnlyError, tree.lock_tree_write)
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        tree.unlock()
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    def test_lock_write(self):
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        """Check we can lock_write and unlock MemoryTrees."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_write()
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        tree.unlock()
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    def test_lock_write_after_read_fails(self):
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        """Check that we error when trying to upgrade a read lock to write."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_read()
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        self.assertRaises(errors.ReadOnlyError, tree.lock_write)
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        tree.unlock()
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    def test_add_with_kind(self):
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_write()
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        tree.add(['', 'afile', 'adir'], None, 
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                 ['directory', 'file', 'directory'])
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        self.assertEqual('afile', tree.id2path(tree.path2id('afile')))
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        self.assertEqual('adir', tree.id2path(tree.path2id('adir')))
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        self.assertFalse(tree.has_filename('afile'))
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        self.assertFalse(tree.has_filename('adir'))
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        tree.unlock()
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    def test_put_new_file(self):
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_write()
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        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 
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                  kinds=['directory', 'file'])
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        tree.put_file_bytes_non_atomic('foo-id', 'barshoom')
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        self.assertEqual('barshoom', tree.get_file('foo-id').read())
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        tree.unlock()
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    def test_put_existing_file(self):
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_write()
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        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 
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                 kinds=['directory', 'file'])
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        tree.put_file_bytes_non_atomic('foo-id', 'first-content')
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        tree.put_file_bytes_non_atomic('foo-id', 'barshoom')
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        self.assertEqual('barshoom', tree.get_file('foo-id').read())
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        tree.unlock()
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    def test_commit_trivial(self):
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        """Smoke test for commit on a MemoryTree.
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        Becamse of commits design and layering, if this works, all commit
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        logic should work quite reliably.
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        """
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_write()
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        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 
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                 kinds=['directory', 'file'])
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        tree.put_file_bytes_non_atomic('foo-id', 'barshoom')
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        revision_id = tree.commit('message baby')
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        # the parents list for the tree should have changed.
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        self.assertEqual([revision_id], tree.get_parent_ids())
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        tree.unlock()
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        # and we should have a revision that is accessible outside the tree lock
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        revtree = tree.branch.repository.revision_tree(revision_id)
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        self.assertEqual('barshoom', revtree.get_file('foo-id').read())
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    def test_unversion(self):
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        """Some test for unversion of a memory tree."""
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        branch = self.make_branch('branch')
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        tree = MemoryTree.create_on_branch(branch)
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        tree.lock_write()
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        tree.add(['', 'foo'], ids=['root-id', 'foo-id'], 
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                 kinds=['directory', 'file'])
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        tree.unversion(['foo-id'])
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        self.assertFalse(tree.has_id('foo-id'))
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        tree.unlock()
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    def test_last_revision(self):
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        """There should be a last revision method we can call."""
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        tree = self.make_branch_and_memory_tree('branch')
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        tree.lock_write()
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        tree.add('')
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        rev_id = tree.commit('first post')
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        tree.unlock()
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        self.assertEqual(rev_id, tree.last_revision())