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Viewing changes to bzrlib/tests/test_memorytree.py

Various changes to allow non-workingtree specific tests to run entirely
from MemoryTransports:
 * Create MemoryTree and pull up common code for it from WorkingTree to
   a new common base class MutableTree.
 * Add MutableTree.mkdir().
 * Add MutableTree.put_file_bytes_nonatomic().
 * New test helper make_branch_and_memory_tree().
(Robert Collins)

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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_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, ['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=['foo-id'], kinds=['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=['foo-id'], kinds=['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=['foo-id'], kinds=['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())